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ADF4113BRU - 4 GHz Integer-N RF PLL | Analog Devices
ADF4113BRU

ADF4113BRU - 4 GHz Integer-N RF PLL | Analog Devices

The Analog Devices ADF4113BRU is a single integer-N RF frequency synthesizer with a 4.0 GHz maximum operating frequency, programmable prescaler and charge pump, and a 16-pin TSSOP package. The device combines a low-noise digital phase-frequency detector, precision charge pump, programmable reference divider, programmable A and B counters, and a dual-modulus prescaler for local-oscillator generation in wireless receivers and transmitters. Its programmable architecture lets designers divide down a stable reference source and synthesize the required carrier frequency while controlling channel spacing through the reference divider, counters, and prescaler settings. An integer-N PLL is a frequency-synthesizer category in which the feedback prescaler and integer counters establish the output frequency while the phase-frequency detector and charge-pump network close the loop around a voltage-controlled oscillator. The ADF4110 family therefore belongs to the broader hierarchy of clock and timing ICs, frequency synthesizers, phase-locked loops, RF signal-chain ICs, and semiconductors. Integer-N operation simplifies control compared with fractional-N architectures, while the maximum RF input rate enables high-frequency local-oscillator designs when the VCO and loop bandwidth are suitable. The ADF4113BRU supports RF synthesis up to 4.0 GHz and includes programmable dual-modulus prescaling, programmable charge-pump currents, a separate charge-pump supply, and a programmable reference divider. The family documentation also identifies 3 V system operation. Separate charge-pump supply capability allows extended tuning-voltage headroom, which is useful when the external VCO requires a tuning range beyond the main supply rail. The programmable charge-pump current provides another control point for loop dynamics and reference-spur trade-offs. The internal signal path uses a low-noise digital phase-frequency detector, precision charge pump, programmable reference divider, A and B counters, and P/P+1 dual-modulus prescaler. This arrangement is intended for integer-N local oscillators in RF upconversion and downconversion paths. The 16-TSSOP body is 4.40 mm wide and corresponds to the 0.173-inch package description listed by DigiKey. Package, lead finish, and orderable suffix must be checked against the Analog Devices ordering guide before substituting an alternative. Typical uses include GSM and other wireless receiver or transmitter local oscillators, RF upconversion and downconversion blocks, communications test equipment, and frequency-generation subsystems. In such systems, the reference divider can reduce a high-frequency reference before comparison with the divided VCO output. The A counter, B counter, and dual-modulus prescaler determine the integer multiplication relationship, while the charge pump and external loop filter translate phase error into VCO tuning voltage. The principal design constraint is loop stability. Component values for the charge-pump, loop filter, and VCO must be derived for the actual reference frequency, target output frequency, prescaler, phase margin, and tuning range. RF routing also requires short, controlled-impedance paths, solid return planes, and careful separation between sensitive synthesizer inputs and high-energy clock or switching nodes. The ADF4113 datasheet family should be consulted for the complete pin table and application circuit. This product record combines verified manufacturer and distributor information with a focused comparison of same-package options, practical loop-filter and layout guidance, and commercial availability context. It is intended to help engineers confirm footprint, frequency capability, programming architecture, and source-document status before committing a PLL design to layout or production.

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ADF4113BRUZ - 4GHz Integer-N RF PLL | Analog Devices
ADF4113BRUZ

ADF4113BRUZ - 4GHz Integer-N RF PLL | Analog Devices

The Analog Devices ADF4113BRUZ is a single-channel, integer-N RF phase-locked-loop frequency synthesizer rated to 4 GHz and packaged in a 16-pin TSSOP with a 4.40 mm body width. It generates programmable local-oscillator or clock frequencies for wireless transmitters and receivers by combining a programmable prescaler, integer-N frequency dividers, a phase-frequency detector, a charge pump, and a reference-divider stage in one RF synthesizer package. An RF PLL is a closed-loop timing circuit used to create a stable, programmable output frequency from a reference source. The phase-frequency detector compares the divided output with the divided reference, while the charge pump converts phase error into a control voltage for an external voltage-controlled oscillator. In system terms, the ADF4113BRUZ belongs to the hierarchy of clock and timing ICs, frequency synthesizers, RF synthesizers, and phase-locked loops used for local-oscillator generation. Key features include integer-N frequency synthesis, operation up to 4 GHz, and a programmable prescaler and charge-pump arrangement. The device is intended for RF local-oscillator generation in wireless receivers and transmitters. Its 16-pin TSSOP package is relatively compact for an RF synthesizer, but correct implementation still requires an external crystal or reference oscillator, loop-filter components, and a VCO or externally supplied RF feedback path. The synthesizer architecture supports programmable A and B counters, a dual-modulus P/P+1 prescaler, a programmable reference divider, a low-noise digital phase-frequency detector, and a precision charge pump. These functional blocks allow the output frequency to be set by integer division ratios while the closed feedback loop corrects phase and frequency errors. The exact counter ranges, minimum channel spacing, reference-input conditions, and lock-time behavior should be confirmed against the manufacturer datasheet before final loop design. Typical applications include GSM and wireless local oscillators, radio receiver and transmitter down-converters and up-converters, RF test equipment, and frequency-generation modules. The integer-N architecture is particularly useful where channel spacing and integer divider ratios align with the required output frequencies. A fractional-N synthesizer may be more appropriate when non-integer channel spacing or finer resolution is required. The principal design consideration is the complete reference, filter, and VCO chain. The charge-pump current, loop-filter resistance and capacitance, reference frequency, prescaler, and N-counter values jointly determine phase noise, lock time, spur performance, and reference-divider spur levels. Follow the manufacturer’s loop-filter example and PCB layout guidance, and keep RF feedback routing short and controlled. This product page combines the ADF4113BRUZ ordering information, a 4 GHz parameter summary, same-package replacement candidates, application guidance, and implementation-focused design notes. These resources support initial part selection and board planning while the manufacturer datasheet remains the controlling reference for ratings, pin functions, register behavior, and final circuit values.

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ADF4116BRUZ - 550 MHz Integer-N PLL | Analog Devices
ADF4116BRUZ

ADF4116BRUZ - 550 MHz Integer-N PLL | Analog Devices

The Analog Devices ADF4116BRUZ is a single-channel, integer-N radio-frequency phase-locked loop frequency synthesizer with a maximum output frequency of 550 MHz, supplied in a 16-pin TSSOP package. It combines a low-noise digital phase-frequency detector, precision charge pump, programmable reference divider, programmable A and B counters, and a dual-modulus prescaler for programmable RF clock and local-oscillator generation. An RF PLL frequency synthesizer is a clock-and-timing IC that locks an output phase to a reference frequency. Within the broader semiconductor hierarchy, the ADF4116 belongs to the clock and timing family and supports applications that require stable, programmable RF frequencies for wireless receiver and transmitter signal chains. The ADF4116 operates from a 5.5 V supply and includes a separate charge-pump supply arrangement for extended tuning-voltage capability. It supports 3 V systems, uses an external reference, and provides an external CMOS clock input and clock output. Its architecture permits integer-N frequency planning using the programmable reference divider, A counter, B counter, and dual-modulus prescaler. At an RF output frequency of up to 550 MHz, the device can generate local-oscillator signals for wireless upconversion and downconversion sections. The manufacturer identifies ADF4116, ADF4117, and ADF4118 as a related family with maximum frequencies of 550 MHz, 1.2 GHz, and 3.0 GHz, respectively; the higher-frequency members also support separate tuning-voltage operation. Typical uses include wireless receiver and transmitter local oscillators, RF signal-generation systems, test and measurement equipment, and frequency conversion stages in communications equipment. Designers must select the reference frequency, prescaler, counter values, charge-pump current, and loop-filter components to meet the required output range and phase-noise performance. A key design consideration is loop-filter tuning because it directly affects lock behavior, phase noise, and reference-spur performance. The charge-pump output drives the external loop filter, and the available tuning voltage must remain within both the RF-VCO and ADF4116 charge-pump constraints. This product page consolidates verified manufacturer specifications, distributor pricing, lifecycle information, and same-package replacement analysis. It also distinguishes a documented legacy variant from reel-format order codes so engineers can make a pin-compatible sourcing decision without treating packaging-only variants as separate drop-in alternatives.

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ADF4117BRU - 1.2GHz Integer-N RF PLL | Analog Devices
ADF4117BRU

ADF4117BRU - 1.2GHz Integer-N RF PLL | Analog Devices

The Analog Devices ADF4117BRU is a 1.2 GHz integer-N radio-frequency phase-locked-loop frequency synthesizer in a 16-pin TSSOP package. It is designed to generate programmable local-oscillator signals for RF upconversion and downconversion in wireless receivers and transmitters. According to the Analog Devices product page, the ADF4117 is in production and the family data sheet is Revision D. A frequency synthesizer is an electronic timing and control component that produces an output frequency derived from a stable reference frequency. An integer-N PLL belongs to the integer-N frequency synthesizer family within clock and timing ICs. Its phase-frequency detector, charge pump, reference divider, A and B counters, and dual-modulus prescaler allow a receiver or transmitter to select an RF output frequency through digital programming. The ADF4117BRU combines an input reference and programmable feedback path in a 1.2 GHz RF PLL. The verified distributor listing identifies the device as a single RF clock/frequency-synthesizer IC with one output in a 16-TSSOP package measuring 4.40 mm wide. The Analog Devices family data sheet describes low-noise digital phase-frequency detection, a precision charge pump, a programmable reference divider, programmable A and B counters, and a dual-modulus P/P+1 prescaler as the principal internal functional blocks. The device is appropriate for RF signal chains requiring a programmable local oscillator. Its 1.2 GHz maximum indicated synthesizer frequency supports wireless receiver and transmitter architectures operating within that range. The integer-N architecture simplifies frequency planning because the prescaler, A counter, and B counter determine the synthesized output relationship to the reference and feedback signals. Typical uses include wireless receiver downconversion, wireless transmitter upconversion, RF communications equipment, and other systems requiring an integrated programmable PLL. The 16-TSSOP package also allows reuse of compact RF board layouts designed for compatible members of the ADF411x family, provided the pin arrangement, frequency range, register behavior, and operating requirements are verified before substitution. When designing around the ADF4117BRU, verify the complete reference and feedback network, counter programming, loop filter, charge-pump settings, and RF output routing against the manufacturer data sheet. Ensure the selected reference frequency and prescaler produce the intended channel-plan relationship without exceeding the device's stated operating limits. This page combines the verified 1.2 GHz and 16-TSSOP identity, manufacturer family architecture, current production indication, distributor pricing reference, and same-package cross-reference information into a design-oriented resource for engineers evaluating the ADF4117BRU.

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ADF4117BRUZ - 1.2 GHz Integer-N PLL | Analog Devices
ADF4117BRUZ

ADF4117BRUZ - 1.2 GHz Integer-N PLL | Analog Devices

Analog Devices ADF4117BRUZ is a single-channel, integer-N phase-locked-loop frequency synthesizer with a maximum RF input frequency of 1.2 GHz, a 100 MHz reference input range, and a 200 MHz output capability in a 16-pin TSSOP package. It combines a low-noise digital phase-frequency detector, precision charge pump, programmable reference divider, programmable A and B counters, and a dual-modulus prescaler for flexible local-oscillator synthesis. A phase-locked loop, or PLL, is a feedback-controlled timing circuit that locks an output frequency to a stable reference frequency. The ADF411x family belongs to the frequency synthesizer hierarchy, where integer-N PLL synthesizers convert a reference source into programmable RF local-oscillator signals for wireless receivers and transmitters. The architecture offers integer division of the phase-detector frequency while the dual-modulus prescaler supports fractional-equivalent programming behavior within the prescaler constraints. The ADF4117 reaches a 1.2 GHz maximum RF frequency and operates from a 3 V system, with a 5.5 V maximum power-supply rating identified in the device documentation. Its programmable A and B counters, reference divider, and charge-pump output support adjustable synthesis ratios and tuning-voltage control. The part is identified as a single CMOS PLL with one synthesizer channel and one clock output function, making it suitable for compact RF signal-chain implementations. Technically, the low-noise digital phase-frequency detector compares the divided feedback signal with the divided reference. The charge pump converts the phase error into current that controls the external loop filter and tuning voltage. The resulting voltage adjusts the VCO, while the prescaler and integer counters determine the synthesis ratio. Designers must account for loop bandwidth, reference phase noise, VCO noise, filter components, and settling time when planning the RF layout. Typical uses include wireless receiver local oscillators, wireless transmitter upconversion and downconversion paths, radio equipment, and other RF systems requiring a programmable local oscillator. The device can also serve test and measurement front ends where a synthesized source is needed. Its 1.2 GHz ceiling gives it useful coverage for many RF communications bands while retaining the architecture and programming model of the wider ADF411x family. The principal design consideration is the charge-pump and VCO loop. Keep the charge-pump trace short, place loop-filter components close to the relevant pins, maintain a clean return path, and separate sensitive reference and RF routes from switching or high-current circuitry. Confirm lock range, tuning range, reference-divider settings, and settling behavior using the manufacturer’s datasheet and evaluation hardware. This product page combines the manufacturer’s ADF4117 information with package, sourcing, replacement, and design context. It identifies the verified electrical envelope, clarifies pin assignments, maps suitable RF applications, and identifies the practical limits of drop-in replacement choices for this specific 16-pin TSSOP device.

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ADF4118BRU - 3 GHz Integer-N RF PLL | Analog Devices
ADF4118BRU

ADF4118BRU - 3 GHz Integer-N RF PLL | Analog Devices

The Analog Devices ADF4118BRU is a single-channel, integer-N RF phase-locked-loop frequency synthesizer rated to 3.0 GHz and packaged in a 16-pin TSSOP. It is designed for wireless receiver and transmitter local oscillators, where programmable division, frequency synthesis, and phase locking must be combined in one IC. According to the Analog Devices product page, the ADF4118 is currently marked production, and the listed starting price is $2.78 as of the verified distributor search on 2026-10-23. An RF PLL is a clock-and-timing integrated circuit that locks a voltage-controlled oscillator to a stable reference frequency. The ADF4118 family combines a low-noise digital phase-frequency detector, precision charge pump, programmable reference divider, programmable A and B counters, and a dual-modulus prescaler. This hierarchy places it under frequency synthesizers, clock and timing ICs, and semiconductor components used to control RF oscillators. The verified product classification identifies one RF PLL channel, integer-N synthesis, a maximum operating frequency of 3 GHz, and a 16-pin TSSOP package measuring 0.173 inch wide by 4.40 mm. Its programmable architecture supports local-oscillator generation in up-conversion and down-conversion sections of wireless receivers and transmitters. The precision charge-pump output drives an external loop filter, while the divided reference and counter paths establish the target synthesis ratio. The ADF4118 family architecture supports integer-N frequency synthesis by comparing the divided oscillator signal with a divided reference. Designers select divider and counter values, then calculate loop-filter components according to the Analog Devices family datasheet. This architecture is useful when a stable system reference is available and the required local-oscillator frequency must be generated with programmable division. It is not a general-purpose clock generator for applications where the output frequency is fixed and no feedback loop is required. Typical uses include wireless transmitter local oscillators, wireless receiver down-conversion, up-conversion mixers, and other RF signal chains that require synthesized frequencies. The 3 GHz capability is appropriate for RF systems whose local-oscillator requirements fall within the device range. Final suitability depends on reference frequency, prescaler settings, counter limits, loop-filter design, output buffering, and compliance with the manufacturer’s recommended operating conditions. For PCB implementation, keep the charge-pump trace and loop-filter components close to the device, maintain short RF paths, and use a controlled reference signal. The external loop filter is part of the frequency-control system; changing its resistance or capacitance can alter loop dynamics, phase margin, and spur performance. Designers should review the family datasheet and application guidance before fixing component values. This page combines the verified manufacturer classification, distributor package and pricing information, and cross-reference findings with practical selection guidance. It distinguishes confirmed data from specifications that require direct confirmation from the current Analog Devices datasheet, helping engineers identify the correct PLL family and package without confusing similar ADF4110 or ADF4154 devices.

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ADF4118YRUZ - 3.0 GHz Integer-N PLL | Analog Devices
ADF4118YRUZ

ADF4118YRUZ - 3.0 GHz Integer-N PLL | Analog Devices

Analog Devices ADF4118YRUZ is a single-channel, integer-N, 3.0 GHz phase-locked-loop frequency synthesizer in a 16-lead surface-mount package. It is designed to generate local-oscillator signals for wireless receiver and transmitter upconversion and downconversion paths. The frequency synthesizer integrates a low-noise digital phase-frequency detector, precision charge pump, programmable reference divider, programmable A and B counters, and a dual-modulus prescaler identified as P/(P+1). Its integer-N architecture simplifies frequency planning by making the feedback-divider division ratio an integer and avoiding the fractional-N interpolation circuitry required by fractional synthesizers. A phase-locked loop is a feedback-control system that locks an output oscillator phase to a reference signal. The ADF4118 compares its divided feedback output with a reference through the phase-frequency detector. The detector and charge pump convert phase and frequency error into a correction voltage for the internal voltage-controlled oscillator, or VCO. In an RF transceiver, this closed-loop arrangement produces a stable local-oscillator signal while suppressing phase noise and reference-multiplication effects. The device therefore belongs to the frequency-synthesizer and clock-and-timing hierarchy before broader categories such as RF signal-generation ICs and semiconductor devices. The manufacturer's ADF4116, ADF4117, and ADF4118 family documentation identifies programmable reference division, A-counter and B-counter functions, and a dual-modulus prescaler as central features. These controls let a designer establish the relationship among the reference frequency, prescaler, counters, and generated RF output. For the ADF4118YRUZ, the 3.0 GHz headline frequency makes the device relevant to radio systems operating below or around that upper limit, including wireless transceivers and test equipment. The exact operating supply, current consumption, noise, lock-time, and counter ranges should be confirmed from the manufacturer datasheet before final circuit release. Typical uses include wireless receiver local oscillators, transmitter upconversion and downconversion chains, industrial RF test equipment, and communication modules requiring programmable frequency generation. In a typical design, the reference oscillator feeds the reference divider and PFD, while the VCO output is divided through the prescaler and counters before being returned to the loop. Correct charge-pump current, loop-filter values, VCO gain, and reference frequency determine lock behavior and phase noise. A key design consideration is loop stability. Keep the feedback divider, loop filter, and RF output path compact, use stable reference and decoupling components, and account for charge-pump mismatch when the loop is driven into cycle slipping. This page combines the verified product identity, manufacturer family description, sourcing guidance, and engineering-oriented design guidance to support component selection before a schematic is released. For purchasing, stock, and lead-time confirmation, use the Request a Quote form on this page and specify the exact ADF4118YRUZ ordering code. Do not substitute a different package suffix without checking land pattern, pin functions, exposed-pad requirements, and production status against the manufacturer datasheet.

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ADF4150BCPZ - 4.4 GHz Fractional-N PLL | Analog Devices
ADF4150BCPZ

ADF4150BCPZ - 4.4 GHz Fractional-N PLL | Analog Devices

The Analog Devices ADF4150BCPZ is a fractional-N and integer-N radio-frequency phase-locked-loop frequency synthesizer with an operating input frequency range of 10 MHz to 4 GHz, a maximum synthesizer frequency of 4.4 GHz, and a 750 MHz output reference capability. It is packaged in a 24-lead WFQFN with exposed pad, also identified as a 24-pin LFCSP, for surface-mount RF and timing applications. A phase-locked loop, or PLL, is a frequency-control system in which a phase detector compares a divided feedback signal with a reference signal and drives a voltage-controlled oscillator through a loop filter. The ADF4150 provides the digital divider, phase detector, charge pump, reference and control registers required to implement a fractional-N or integer-N synthesizer. It requires an external VCO, loop filter, and reference source, allowing the RF tuning range and loop performance to be tailored to the target system. Principal features include support for both fractional-N and integer-N operation, programmable RF output division by 1, 2, 4, 8, or 16, and software compatibility with the ADF4350 family. The 24-WFQFN exposed-pad package supports compact surface-mount layouts and provides a central thermal connection. The digital control interface permits operating parameters to be configured through a serial bus rather than fixed hardware settings. The device divides the feedback signal into the phase detector and compares that divided signal with the external reference. Its charge pump drives the external loop filter, which controls the tuning voltage applied to the external VCO. Fractional-N operation enables a rational division ratio that can represent frequencies with a finer effective resolution than an integer divider alone, while integer-N operation provides a conventional integer-ratio configuration. Typical applications include wireless communication infrastructure, test and measurement equipment, clock generation for RF systems, radar-related signal chains, industrial instrumentation, and local oscillator generation. The part is especially useful when a design needs programmable fractional frequency synthesis while retaining flexibility over the external VCO and loop-filter implementation. Design should account for the external VCO, loop filter, reference source, output matching, decoupling, and exposed-pad thermal design. Use the ADF4150 datasheet pin-description and test-circuit information when assigning traces, grounding the exposed pad, and selecting component values around the PLL loop. Validate lock range, phase noise, reference spur levels, and temperature performance in the final board-level design. This page organizes the device specifications, sourcing information, drop-in alternatives, application guidance, and engineering design considerations in one concise engineering reference. It is intended to accelerate component selection while keeping the final design anchored to the Analog Devices product documentation.

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ADF4151BCPZ - 3.5 GHz Fractional-N PLL | Analog Devices
ADF4151BCPZ

ADF4151BCPZ - 3.5 GHz Fractional-N PLL | Analog Devices

The Analog Devices ADF4151BCPZ is a 1-channel fractional-N or integer-N phase-locked-loop frequency synthesizer with an operating frequency up to 3.5 GHz, supplied in a 32-lead WFQFN exposed-pad CSP package. It requires an external voltage-controlled oscillator, loop filter, and reference frequency to implement a complete frequency synthesizer. A phase-locked loop, or PLL, is a feedback-controlled timing circuit that locks an output oscillator to a stable reference. Within the broader semiconductor hierarchy, the ADF4151 is a clock-generation and timing IC, specifically a frequency synthesizer. Its fractional-N and integer-N operating modes provide programmable division while allowing the associated VCO to generate a precisely controlled high-frequency output. The principal features include support for both fractional-N and integer-N synthesis, a 1-channel architecture, and operation with a 10 MHz input reference according to the product listing. The ADF4151BCPZ is also footprint- and software-compatible with the ADF4350 family, as identified by Analog Devices, making it useful when an existing board architecture must support either device family. Its exposed-pad package supports improved thermal dissipation when the PCB provides an effective thermal path. The synthesizer architecture separates frequency generation from the RF output stage. The ADF4151 generates the control information needed to drive an external VCO, while an external loop filter converts the charge-pump and phase-detector signals into a control voltage. This architecture allows the VCO, loop bandwidth, output power, and tuning range to be selected for the intended RF band rather than being fixed inside the synthesizer IC. Typical applications include wireless communication infrastructure, test and measurement equipment, industrial radio links, frequency-modulated signal generation, and local-oscillator synthesis for RF front ends. For systems requiring continuous phase adjustment, the fractional-N mode offers finer division ratios than integer-N operation. Integer-N mode is useful where simpler integer ratios, deterministic division behavior, or conventional loop-filter design are priorities. The principal design consideration is closing the PLL loop correctly. The reference source, charge-pump current, loop filter, VCO tuning gain, and expected phase noise must be evaluated together. Place the exposed pad over a low-impedance thermal and ground structure, follow the reference and charge-pump layout guidance in the manufacturer datasheet, and keep sensitive feedback and control traces away from high-current switching nodes. This page consolidates the verified product characteristics, compatible device options, application guidance, and practical PCB considerations into one engineering-focused reference for evaluating the ADF4151BCPZ in fractional-N and integer-N frequency-synthesizer designs.

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ADF4153BCP - 4 GHz Fractional-N Synthesizer | Analog Devices
ADF4153BCP

ADF4153BCP - 4 GHz Fractional-N Synthesizer | Analog Devices

The Analog Devices ADF4153BCP is a fractional-N frequency synthesizer covering 500 MHz to 4 GHz, operating from a 3.3 V supply and packaged in a 20-lead LFCSP surface-mount package. It combines a low-noise digital phase-frequency detector, precision charge pump, programmable reference divider, and Sigma-Delta fractional interpolator for programmable fractional-N division. A fractional-N frequency synthesizer is a clock-generation IC that synthesizes an output frequency locked to an external reference while allowing non-integer division ratios. Within the broader semiconductor hierarchy, it is a PLL-based frequency synthesizer, a clock-and-timing IC, and a power-management-adjacent RF timing component used to generate stable local-oscillator signals in receiver and transmitter chains. The ADF4153 supports RF bandwidths from 500 MHz to 4 GHz and includes selectable 4/5 and 8/9 dual-modulus prescalers. Programmable charge-pump currents support loop-filter optimization, while the 3-wire serial interface provides register-based control of synthesis functions. The separate VP connection allows the tuning-voltage supply to be extended, making the device suitable for RF systems requiring elevated VCO tuning voltages. Its architecture uses a low-noise digital phase-frequency detector to compare the divided feedback signal with the divided reference. A precision charge pump drives the loop-filter voltage, while the Sigma-Delta fractional interpolator enables fractional division without changing the external reference frequency. The result is flexible frequency planning for RF transmitters, receivers, instrumentation, and communication equipment. Typical uses include wireless receiver and transmitter local oscillators, upconversion and downconversion chains, RF test equipment, and frequency-generation modules. The fractional-N architecture is particularly useful when the desired channel spacing cannot be obtained conveniently through integer-N division. The 4 GHz upper operating limit supports high-band RF designs, while the 500 MHz lower limit covers cellular, microwave, and test-signal applications. PCB layout is critical because the ADF4153's phase-noise and spur performance depends on isolation between the RF input, VCO, reference, charge-pump output, and sensitive analog supply pins. Keep the VCO away from the reference input to avoid board-level reference-noise feedthrough, and place decoupling and loop-filter components close to their associated pins. This page combines verified Analog Devices product information, distributor pricing, package details, candidate drop-in alternatives, and practical design guidance to support faster component selection, PCB compatibility review, and RF design planning.

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ADF4153BRU - 4 GHz Fractional-N PLL | Analog Devices
ADF4153BRU

ADF4153BRU - 4 GHz Fractional-N PLL | Analog Devices

The Analog Devices ADF4153BRU is a fractional-N frequency synthesizer with a documented input range of 10 MHz to 4 GHz and a 4 GHz maximum synthesizer frequency, housed in a 16-pin TSSOP package measuring 0.173 inch, or 4.40 mm, in width. It is designed for local-oscillator and frequency-conversion functions in wireless receivers and transmitters. The device combines a low-noise digital phase-frequency detector, a precision charge pump, a programmable reference divider, and a sigma-delta fractional-N interpolator. A fractional-N frequency synthesizer is a clock-and-timing integrated circuit that generates an output frequency by phase-locking a voltage-controlled oscillator to a stable reference. The fractional-N architecture permits programmable fractional division, while the phase-frequency detector and charge pump compare the divided feedback signal with the reference. This places the ADF4153BRU within the broader PLL, frequency synthesizer, clock-generation, and power-management-supported signal-chain hierarchy. The principal verified feature set includes fractional-N operation, a PLL architecture, an RF input range of 10 MHz to 4 GHz, a 4 GHz upper frequency, and a 16-pin TSSOP package. The manufacturer describes the sigma-delta fractional interpolator as the element that enables programmable fractional-N division. These characteristics suit communications equipment requiring synthesized RF signals and programmable frequency relationships between a reference source and an external voltage-controlled oscillator. The ADF4153BRU uses a precision charge pump and low-noise digital phase-frequency detector to support the phase-locked loop. The programmable reference divider lets the reference relationship be adjusted for a given system architecture. The supplied manufacturer documentation also warns that reference-switching noise can couple from the RF input back toward the VCO and create reference spurs, potentially reaching -90 dBc; this makes physical separation and controlled PCB routing important. Typical uses include wireless receiver local oscillators, wireless transmitter upconversion and downconversion stages, RF communication equipment, test and measurement instruments, industrial RF systems, and instrumentation requiring programmable fractional frequency synthesis. In each case, the component serves as the programmable phase-locking element rather than a complete standalone RF signal source because an external VCO and loop-filter implementation are central to this device class. PCB implementation should keep the VCO separated from the reference input to minimize the documented feedthrough path. Designers should also use short, controlled reference and feedback routes, place decoupling close to the supply pins, and follow the manufacturer datasheet for loop-filter and charge-pump component values. These measures help limit reference spurs while preserving the fractional-N synthesizer's intended frequency accuracy and phase-noise behavior. This page consolidates the verified manufacturer specifications, distributor availability, package information, purchasing context, and practical layout guidance for ADF4153BRU. It also separates confirmed drop-in information from unverified functional substitutes so engineers can assess replacement risk without assuming that similar fractional-N synthesizers share the same footprint.

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ADF4153BRUZ - 4GHz Fractional-N PLL | Analog Devices
ADF4153BRUZ

ADF4153BRUZ - 4GHz Fractional-N PLL | Analog Devices

Analog Devices ADF4153BRUZ is a 4 GHz fractional-N frequency synthesizer IC with one RF output, packaged in a 16-pin TSSOP measuring 4.40 mm in width. It is designed to generate local-oscillator signals in wireless receiver and transmitter upconversion and downconversion paths, while its external reference interface supports programmable frequency synthesis from a stable off-chip reference. A fractional-N frequency synthesizer is a PLL-based timing and RF signal-generation device that combines integer-N division with a sigma-delta fractional interpolator. This enables fine frequency resolution without requiring an extremely high reference frequency. Within the product hierarchy, the ADF4153 belongs to the phase-locked-loop family, the clock and timing IC category, and ultimately the broader semiconductor category used for programmable RF and clock generation. The principal identifiers are a maximum synthesizer frequency of 4 GHz, one RF output, fractional-N operation, and a 16-pin TSSOP package. The device includes a low-noise digital phase-frequency detector, a precision charge pump, and a programmable reference divider. These blocks establish the phase-error signal, control the charge injected into the loop filter, and divide the reference frequency presented to the synthesizer core. The sigma-delta fractional interpolator permits programmable fractional-N division for applications requiring precise channel spacing. The ADF4153 is particularly useful when a system needs a locally generated RF carrier with adjustable output frequency. Its fractional-N architecture is applicable to wireless transceivers, test equipment, instrumentation, and communication infrastructure. An external reference and loop-filter implementation also let engineers tune phase noise, reference-divider settings, channel spacing, and lock behavior to the requirements of a particular system rather than relying on a fixed internal timebase. Typical applications include wireless receiver and transmitter local oscillators, RF upconversion and downconversion chains, laboratory frequency generators, and phase-locked test equipment. In a communications design, the synthesizer can generate the carrier or local-oscillator reference used by mixer stages. In instrumentation, programmable division and fractional-N operation can support frequency selection across a wide operating range while retaining compact PLL implementation. The principal design consideration is loop-filter realization. Its component values determine reference-divider settings, fractional-N behavior, loop bandwidth, settling time, and phase-noise performance. Follow the ADF4153 manufacturer datasheet for the recommended reference-divider and charge-pump settings, and validate filtering and spur performance at the intended carrier and reference frequencies before releasing the PCB design. This product page combines the device identity, package information, verified source links, application guidance, comparison parameters, and practical design notes. It supports faster part selection while keeping the engineer’s focus on the electrical behavior and layout decisions that determine fractional-N PLL performance.

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ADF4153YCPZ - 4 GHz Fractional-N PLL Synthesizer | Analog Devices
ADF4153YCPZ

ADF4153YCPZ - 4 GHz Fractional-N PLL Synthesizer | Analog Devices

Analog Devices ADF4153YCPZ is a fractional-N frequency synthesizer with RF bandwidth to 4 GHz, programmable fractional modulus, and a clock output for precision frequency generation. It operates from a 3.3 V power supply with a 2.7 V to 3.3 V supply range and is packaged in a 20-lead VFQFN with an exposed pad. The Y-grade version supports operation from -40°C to +125°C. Designed for local oscillators in wireless transmitters and receivers, the device combines a low-noise digital phase-frequency detector, a precision charge pump, and a programmable reference divider. A fractional-N frequency synthesizer is a clock-generation and timing IC that locks a voltage-controlled oscillator to a stable reference frequency while dividing the feedback signal into programmable integer and fractional ratios. Its role in the broader hierarchy is fractional-N PLL → phase-locked loop → clock generator → clock and timing IC. This architecture allows fine frequency resolution without requiring an extremely high reference frequency, making the ADF4153 useful in RF systems that demand flexible channel spacing and precise tuning. The principal features include RF bandwidth to 4 GHz, a 3.3 V supply, a separate charge-pump voltage supply that permits an extended tuning-voltage range, programmable fractional modulus, and programmable charge-pump current. Differential reference and feedback inputs are indicated by the device specifications, while the synthesizer supplies a single-ended clock output. The 20-VFQFN exposed-pad package provides a compact surface-mount solution and exposes a thermal connection beneath the device. Internally, the phase-frequency detector compares the divided feedback signal with the divided reference. The charge pump converts phase error into a current that controls the external voltage-controlled oscillator. Programmable integer and fractional feedback ratios determine the synthesized output. The fractional-N architecture supports practical channel spacing without requiring every channel to be generated by changing the reference frequency, although phase noise, reference spurs, and VCO tuning range remain critical system-level considerations. Typical uses include wireless receiver and transmitter local oscillators, upconversion and downconversion sections, radio equipment, communication infrastructure, and test systems requiring programmable RF frequencies. The ADF4153 is particularly appropriate when the design needs fractional channel spacing while retaining a 4 GHz maximum RF bandwidth. It can also be used as the frequency-setting element in phased-array, microwave, and instrumentation systems when combined with a suitable external VCO. Layout is a central implementation concern because reference-switching noise can feed through the RF input and modulate the VCO. Keep the VCO physically separated from the reference path, use a compact ground plane, route sensitive nodes away from digital and switching-current paths, and follow the pin-description and layout guidance in the manufacturer datasheet. Decoupling capacitors should be placed directly at the appropriate supply pins, with careful attention to the exposed-pad connection for thermal performance. This product page combines the core device specifications, verified technical characteristics, application guidance, and replacement analysis. It also highlights the practical distinction between a genuine package-compatible substitution and a superficially similar PLL whose register map, RF limits, electrical ratings, or pin assignments may differ.

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ADF4153YRUZ - 4 GHz Fractional-N PLL | Analog Devices
ADF4153YRUZ

ADF4153YRUZ - 4 GHz Fractional-N PLL | Analog Devices

The Analog Devices ADF4153YRUZ is a fractional-N frequency synthesizer with an RF bandwidth up to 4 GHz, a 3.3 V power supply, and a 16-TSSOP package measuring 4.40 mm in width. It is designed to generate local-oscillator signals for wireless transmitters, receivers, upconverters, and downconverters, while its fractional-N architecture supports programmable frequency synthesis beyond the resolution of a conventional integer-N PLL. A fractional-N frequency synthesizer belongs to the PLL family of clock-generation and timing integrated circuits. A PLL locks the phase and frequency of an output signal to a reference source, while a fractional-N PLL divides the feedback count through controlled fractional feedback to achieve finer frequency steps. This combination places the ADF4153YRUZ within the hierarchy of phase-locked loop, frequency synthesizer, clock and timing IC, and semiconductor. The device combines a low-noise digital phase-frequency detector, a precision charge pump, a programmable reference divider, programmable fractional modulus, and programmable charge-pump current. A separate VP connection permits an extended tuning-voltage range. These features support adjustable loop behavior and help engineers balance phase noise, reference-divider frequency, tuning range, and lock performance according to the RF requirements of the receiving or transmitting chain. The ADF4153 is intended for RF local-oscillator generation where a stable reference must be translated into an accurately programmable output frequency. Its 4 GHz RF bandwidth covers applications from wireless communications and test equipment to instrumentation requiring programmable RF clocks. The digital phase-frequency detector and precision charge pump form the core feedback loop, while the fractional-N mechanism allows fine frequency offsets without relying only on integer feedback ratios. Typical uses include wireless receiver and transmitter local oscillators, microwave upconversion and downconversion sections, communications test equipment, and frequency-generation subsystems. Its programmable fractional modulus is particularly useful when the required output frequency must be synthesized with fine resolution while maintaining a controlled relationship to an external reference. When designing the circuit, use the manufacturer pin-description table and recommended decoupling values to assign pins and place components. Account for loop-filter design, reference-divider selection, charge-pump current, and VCO gain when calculating lock time and phase-noise performance. The programming interface and register definitions should be implemented according to the ADF4153 datasheet and its listed digital-control requirements. This product record combines the manufacturer's device description, distributor identification, package information, RF bandwidth, power-supply requirement, and temperature-grade details into an engineering-oriented reference. It also organizes compatible-part considerations, application guidance, comparison points, and practical design cautions so that the ADF4153YRUZ can be evaluated for RF synthesis designs before schematic capture.

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ADF4154BCP - 4 GHz Fractional-N Synthesizer | ADI
ADF4154BCP

ADF4154BCP - 4 GHz Fractional-N Synthesizer | ADI

Analog Devices ADF4154BCP is a fractional-N frequency synthesizer with a 500 MHz to 4 GHz RF bandwidth, a 10 MHz to 4 GHz input-frequency range, and a 3.3 V power supply in a 20-pin LFCSP with exposed-pad package. It is recommended by Analog Devices for new designs and is intended to implement local oscillators in the up-conversion and down-conversion sections of wireless receivers and transmitters. A fractional-N frequency synthesizer belongs to the PLL and clock-and-timing IC hierarchy. Its phase-frequency detector, precision charge pump, programmable reference divider, and sigma-delta fractional interpolator generate an adjustable output frequency while allowing fractional division ratios. This architecture is useful when a system requires fine frequency resolution, rapid programmable tuning, or a compact local oscillator for RF conversion stages. The ADF4154BCP supports programmable dual-modulus prescalers of 4/5 and 8/9, programmable charge-pump currents, and a three-wire serial interface. A separate VP connection permits an extended tuning-voltage range. Digital lock detect provides an observable PLL-lock status, while power-down mode supports low-power operating states. These features make the device applicable to closed-loop RF generation systems where tuning range and lock status must be controlled digitally. Its fractional-N architecture permits the output frequency to be set through integer and fractional division parameters programmed over the serial interface. This differs from a fixed-frequency oscillator because the synthesizer can cover multiple channels within its 500 MHz to 4 GHz RF bandwidth. The programmable prescaler selection and charge-pump setting also give designers control over the relationship between reference frequency, division ratio, and loop-filter behavior. Primary applications include wireless receiver local oscillators, wireless transmitter local oscillators, RF up-conversion and down-conversion paths, and other programmable RF signal-chain systems. The 3.3 V supply reduces the number of supply rails required in many compact RF designs, although external passive filtering and careful PCB layout remain essential for predictable phase-noise and lock performance. Designers should select the reference and loop-filter components to match the intended channel spacing and phase-noise requirements. The three-wire interface requires a controller capable of programming the required register sequence. Ground-plane continuity, exposed-pad soldering, and short RF paths should be verified against the Analog Devices datasheet before production release. This page consolidates the verified manufacturer information, observed distributor price, family alternatives, and application-oriented design guidance available for the ADF4154BCP. It also distinguishes documented specifications from parameters that still require confirmation from the complete manufacturer datasheet.

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ADF4154BCPZ - 4 GHz Fractional-N PLL Synthesizer | ADI
ADF4154BCPZ

ADF4154BCPZ - 4 GHz Fractional-N PLL Synthesizer | ADI

The Analog Devices ADF4154BCPZ is a fractional-N frequency synthesizer with a 500 MHz to 4 GHz RF tuning range, a 2.7 V to 3.3 V supply range, and a separate VP supply input extending to 5.5 V. The device is packaged in a 20-lead WFQFN with an exposed pad and is controlled through a three-wire serial interface. A fractional-N frequency synthesizer is a phase-locked-loop-based clock generator used to produce stable, programmable frequencies for RF systems. Its hierarchy includes frequency synthesizer, PLL synthesizer, clock and timing IC, and semiconductor. By combining integer-N division, programmable dual-modulus prescalers, and a Sigma-Delta fractional interpolator, the ADF4154 supports fractional channel spacing without requiring an integer division ratio for every target frequency. The ADF4154 integrates a low-noise digital phase-frequency detector, a precision charge pump, a programmable reference divider, programmable charge-pump currents, and dual-modulus 4/5 and 8/9 prescalers. Analog and digital lock-detect functions support system monitoring. A separate VP supply allows the tuning voltage to extend above the AVDD range, providing additional tuning headroom in demanding RF applications. FastLock operation is a notable feature for reducing the time required to achieve lock in frequency-agile RF systems. The Sigma-Delta fractional interpolator permits programmable fractional-N division, while the three-wire serial interface simplifies configuration of divider ratios, prescaler values, charge-pump settings, and digital lock-detect behavior. The B-grade operating-temperature range is -40°C to +80°C. Typical uses include wireless receiver and transmitter local oscillators, up-conversion and down-conversion sections, instrumentation, and frequency-agile test equipment. The 20-lead WFQFN exposed-pad package supports compact RF layouts, but careful grounding, supply decoupling, and RF trace control remain essential for predictable phase noise and reliable lock behavior. When designing around the ADF4154BCPZ, preserve the reference-to-RF grounding architecture described by Analog Devices and place decoupling capacitors close to the supply pins. Treat the exposed pad as a thermal and electrical ground connection, and verify the loop filter, VCO characteristics, reference amplitude, and required lock time against the target RF plan. This page combines the manufacturer's device information with a parameter-oriented view of the ADF4154BCPZ, including application guidance, drop-in alternatives, comparison parameters, and practical PCB considerations for fractional-N PLL design.

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ADF4154BRU - 4 GHz Fractional-N Synthesizer | Analog Devices
ADF4154BRU

ADF4154BRU - 4 GHz Fractional-N Synthesizer | Analog Devices

Analog Devices ADF4154BRU is a fractional-N frequency synthesizer covering 500 MHz to 4 GHz, operating from a 2.7 V to 3.3 V power supply and housed in a 16-lead TSSOP package. The device provides programmable 4/5 and 8/9 dual-modulus prescalers, programmable charge-pump currents, a 3-wire serial interface, analog and digital lock detection, and a power-down mode. A separate VP supply supports extended tuning-voltage capability. A fractional-N frequency synthesizer is a phase-locked-loop timing device that synthesizes an accurate output frequency by dividing a reference signal and controlling a programmable dual-modulus prescaler. In the broader semiconductor hierarchy, the ADF4154 belongs to the clock and timing IC family, where it operates as a frequency synthesizer and local oscillator for wireless RF signal chains. The primary features of the ADF4154 address phase-detector tuning, frequency resolution, RF bandwidth, and system control. Its RF bandwidth extends to 4 GHz, while the selectable 4/5 and 8/9 prescalers support multiple feedback-divider arrangements. Programmable charge-pump currents allow the loop bandwidth and reference-spur behavior to be tuned for different reference frequencies and phase-noise requirements. Analog and digital lock detection give the host controller two ways to verify PLL acquisition. Technically, the ADF4154 uses fractional-N division to permit non-integer feedback ratios while retaining a fractional spur. The 3-wire serial interface configures the synthesizer registers, and the separate VP connection allows the tuning-voltage range to exceed what the main supply alone would provide. This architecture is useful when a fixed reference must generate an RF channel with fine frequency resolution. Typical applications include wireless receiver and transmitter local oscillators, up-conversion and down-conversion sections, RF transceiver synthesizers, microwave test equipment, and instrumentation. Its 500 MHz to 4 GHz range is particularly applicable to RF communications equipment operating in the upper UHF, cellular, Wi-Fi, radar, and microwave bands. A critical design consideration is that the reference frequency, prescaler, divider settings, loop filter, charge-pump current, and output frequency must be evaluated together. The loop filter should be calculated for the selected reference and channel spacing, and the RF output network must be impedance-matched to 50 ohms when the application requires standard RF test or measurement equipment. This page combines the verified manufacturer features, package information, pricing reference, pin-compatible family alternatives, comparison parameters, and practical RF design guidance in one engineering-focused resource.

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ADF4155BCPZ - 4 GHz Fractional-N PLL | Analog Devices
ADF4155BCPZ

ADF4155BCPZ - 4 GHz Fractional-N PLL | Analog Devices

The Analog Devices ADF4155BCPZ is a fractional-N or integer-N phase-locked-loop frequency synthesizer with a 4 GHz output, support for an external VCO operating up to 8 GHz, and a 24-WFQFN package with an exposed pad. It accepts a reference input from 500 MHz to 8 GHz and uses an external loop filter, VCO, and reference source to implement the complete frequency-synthesis function. A phase-locked loop, or PLL, is a feedback-controlled oscillator that locks a programmable output frequency to a stable reference. Integer-N operation preserves integer division, while fractional-N operation permits finer frequency steps through a programmable modulus. Within the broader hierarchy of clock and timing ICs, a PLL frequency synthesizer belongs to the clock-generator and phase-locked-loop family used to create stable, programmable RF and microwave signals. The ADF4155 supports fractional-N and integer-N synthesis, a programmable modulus, differential RFOUT+ and RFOUT− connections, and four programmable tail-current levels for the output differential pair. The exposed pad assists heat transfer from the device into the PCB. Its industrial temperature grade and surface-mount construction suit communication, instrumentation, and industrial control systems requiring accurate frequency generation. Internally, the reference signal passes through divider and phase-detector functions before controlling an external VCO through the external loop filter. The RFOUT+ and RFOUT− pins connect to the collectors of an NPN differential pair driven by the RF divider block. Programming the differential-pair tail current changes available output power, giving the system designer four current settings rather than one fixed output condition. Typical applications include cellular and wireless infrastructure, microwave radio equipment, instrumentation and test systems, radar-related signal sources, industrial RF control, and frequency conversion modules. The component is particularly appropriate when the designer wants a flexible integer-N or fractional-N architecture with an external VCO instead of an integrated fixed-frequency oscillator. Design the loop filter for the required phase margin and loop bandwidth rather than treating it as a generic RC network. Keep the reference, feedback, VCO, and RF traces short and controlled, and provide a low-impedance ground path around the exposed pad. Confirm the programmed divider, modulus, charge-pump current, reference frequency, and output power settings together because each affects lock behavior and phase noise. This product page combines the ADF4155BCPZ device specifications, package information, application guidance, and the electrically identical but differently packaged ADF4155BCPZ-RL7 option. It also identifies the engineering limits of substitution, helping designers distinguish a true same-footprint replacement from a merely similar PLL.

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ADF4156BCPZ - 6.2GHz Fractional-N PLL | Analog Devices
ADF4156BCPZ

ADF4156BCPZ - 6.2GHz Fractional-N PLL | Analog Devices

The Analog Devices ADF4156BCPZ is a 6.2 GHz fractional-N frequency synthesizer with a 3-wire serial interface, programmable RF output phase, and cycle-slip reduction circuitry, housed in a 20-lead LFCSP package with an exposed pad. It combines a low-noise digital phase-frequency detector, precision charge pump, programmable divider, and RF output stage to generate local-oscillator signals for wireless receivers and transmitters. A fractional-N frequency synthesizer is a clock-generation IC that synthesizes precise RF frequencies by dividing a stable reference below the requested output frequency and then multiplying that frequency through a phase-locked loop. The fractional-N architecture allows non-integer division ratios, providing fine frequency resolution without requiring an exceptionally high reference frequency. This makes the device suitable for communication systems that need accurate local-oscillator generation from a common reference source. Key features include operation up to 6.2 GHz, a minimum specified RF input frequency of 0.5 GHz, programmable output phase, and cycle-slip reduction for faster lock times without loop-filter changes. The manufacturer documents a maximum serial clock rate of 20 MHz and a 29-bit register transfer format. These characteristics support direct register programming while preserving control over frequency division, charge-pump current, reference settings, and output phase. The internal phase-frequency detector compares the divided feedback signal with the reference signal, while the charge pump drives an external loop filter. The resulting control voltage adjusts the internal voltage-controlled oscillator until the synthesized output reaches the programmed frequency. A stable reference and correctly sized passive loop-filter network are therefore fundamental to accurate locking, low phase noise, and deterministic acquisition behavior. Typical applications include wireless receiver and transmitter local oscillators, upconversion and downconversion chains, phase-controlled RF signal generation, and test equipment requiring programmable fractional frequency synthesis. The device is particularly useful where multiple RF functions must share a reference while retaining independent frequency and phase settings. PCB design should preserve short, controlled-impedance RF routing and keep the RF input path isolated from noisy digital and switching circuitry. The exposed thermal pad requires proper thermal and electrical layout according to the manufacturer guidelines. Adequate supply decoupling and a carefully designed loop filter are essential for stable lock performance and acceptable phase noise. This page combines the ADF4156BCPZ functional description, pin-compatible family references, application guidance, parameter comparisons, and practical layout considerations to support faster engineering evaluation. It also highlights the limits that must be checked before replacing a different synthesizer or reusing an existing RF board layout.

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ADF4156BRUZ - 6.2 GHz Fractional-N PLL Synthesizer | Analog Devices
ADF4156BRUZ

ADF4156BRUZ - 6.2 GHz Fractional-N PLL Synthesizer | Analog Devices

The Analog Devices ADF4156BRUZ is a 6.2 GHz fractional-N frequency synthesizer (PLL) with a minimum RF input frequency of 500 MHz, housed in a 16-lead TSSOP package measuring 0.173" wide by 4.40 mm and programmed over a 3-wire serial interface. It is built to implement local oscillators in the upconversion and downconversion sections of wireless receivers and transmitters. A fractional-N frequency synthesizer is a phase-locked loop that uses a programmable reference divider, a phase frequency detector, a charge pump, and a Sigma-Delta fractional interpolator to synthesize an output frequency that is not an integer multiple of the reference clock. This allows very fine frequency steps without a very high reference frequency, which reduces the reference oscillator's cost, size, and phase noise contribution. In the broader hierarchy it sits as a clock-and-timing IC, a subcategory of integrated circuits used for frequency generation, modulation, and clock distribution. Key features of the ADF4156 include the 6.2 GHz maximum RF input rate, a programmable reference divider, a precision charge pump, and low-noise digital phase frequency detector. The RF output phase is programmable, so a designer can set a specific phase relationship between the output and the reference, which is useful in phased-array and cancellation architectures. Cycle slip reduction circuitry is also built in, delivering faster lock times without requiring modifications to the external loop filter. Technically, the Sigma-Delta fractional interpolator divides the N counter into integer and fractional portions and uses a Sigma-Delta modulator to dither the fractional word, pushing quantization noise to high frequencies where it can be shaped out by the loop filter. Combined with the cycle slip reduction circuit, this gives fast lock with modest loop bandwidth and low in-band phase noise, while the programmable reference divider allows the device to accept a range of reference clock frequencies. Typical uses include wireless transceiver local oscillators, microwave upconverter and downconverter signal chains, cellular and Wi-Fi base station RF front ends, and low-cost laboratory or instrumentation signal sources where a stable, tunable LO is needed above 500 MHz. One key design consideration is the RF input slew rate: although the RF input specification is 0.5 GHz minimum, lower frequencies can be used if the minimum slew rate of 400 V/us is met, and a squaring LVDS driver such as the FIN1001 may be used to square up a slow-slew input. Loop filter component selection and reference jitter budgeting remain the two dominant noise contributors in the design. This page consolidates device specifications, drop-in family alternatives, parameter-by-parameter comparison rows, and practical RF design notes that are not gathered together on a single manufacturer or distributor listing.

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ADF4157BCPZ - 6 GHz Fractional-N PLL | Analog Devices
ADF4157BCPZ

ADF4157BCPZ - 6 GHz Fractional-N PLL | Analog Devices

The Analog Devices ADF4157BCPZ is a high-resolution 6 GHz fractional-N frequency synthesizer packaged in a 20-lead WFQFN exposed-pad package. It combines a 25-bit fixed fractional-N modulus, low-noise digital phase-frequency detector, precision charge pump, programmable reference divider, and Sigma-Delta fractional interpolator. Its specified RF operating range begins at 500 MHz and extends to 6 GHz, supporting subhertz frequency resolution at 6 GHz through programmable integer and fractional division. A fractional-N frequency synthesizer is a phase-locked-loop-based clock and frequency generator that synthesizes an output frequency from a stable reference. In the signal-chain hierarchy, the ADF4157 belongs to clock generation, PLL synthesis, and broader frequency-generation IC families. It is particularly useful when a system requires fine frequency resolution, programmable feedback ratios, and digital control over an RF output without replacing the synthesizer during configuration changes. Key characteristics include a 6 GHz maximum synthesis frequency, 25-bit fractional-N modulus, programmable reference division, and Sigma-Delta fractional interpolation. The low-noise PFD and precision charge pump support the synthesizer’s frequency-generation role, while the fractional interpolator permits programming values between integer feedback ratios. These functions make the device applicable to communication equipment, test instruments, RF signal chains, and frequency-generation subsystems. Technically, the ADF4157 uses a fractional-N architecture to achieve fine frequency resolution while allowing a relatively high prescaler value. The INT and FRAC registers define the integer and fractional feedback ratios, and the reference divider can be programmed to accommodate multiple reference frequencies. Its low-noise architecture also makes input signal quality, reference stability, loop-filter design, and power-supply implementation important parts of achieving predictable phase noise and spur performance. Typical uses include local-oscillator generation for RF communications, tunable clock generation for test and measurement equipment, microwave down-conversion systems, frequency-agile signal sources, and instrumentation requiring fine tuning resolution. The 500 MHz to 6 GHz RF range supports microwave systems while the fractional-N capability allows the output to be positioned at closely spaced frequencies around a chosen reference-derived channel. Designers should place the reference and RF input connections for controlled impedance and isolate sensitive routing from noisy digital and charge-pump paths. The loop filter, reference decoupling, supply bypassing, and exposed-pad thermal design require careful implementation. Verify lock behavior across temperature, supply tolerance, reference accuracy, and the complete intended tuning range before releasing a production board. This product page combines the manufacturer specifications, verified distributor listings, application-oriented design guidance, and a package-focused engineering comparison. It also distinguishes the exact ADF4157BCPZ orderable variant from packaging, package-format, and functionally different parts that are not true pin-to-pin drop-in replacements.

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ADF4157BRUZ - 6 GHz Fractional-N Frequency Synthesizer | Analog Devices
ADF4157BRUZ

ADF4157BRUZ - 6 GHz Fractional-N Frequency Synthesizer | Analog Devices

The Analog Devices ADF4157BRUZ is a 6 GHz fractional-N frequency synthesizer with a 25-bit fixed modulus, delivering sub-hertz frequency resolution at 6 GHz while operating from a single 3.3 V supply in a 16-lead TSSOP package. It integrates a low-noise digital phase frequency detector, a precision charge pump, a programmable reference divider, and a Sigma-Delta based fractional interpolator for programmable fractional-N division. A fractional-N frequency synthesizer, also called a PLL frequency synthesizer, is a phase-locked loop that multiplies a low-frequency reference source to a high-frequency output while allowing fractional division ratios through digital interpolation. The result is a programmable local oscillator with the resolution of a fractional divider but the phase noise and spur performance of a multi-modulus integer-N architecture. Within the clock and timing hierarchy, this part sits between a crystal oscillator and a full RF transceiver front end. Key features of the ADF4157BRUZ include an RF input bandwidth reaching 6 GHz, a 25-bit fixed fractional modulus, a programmable charge pump current, and a separate VP pin that allows an extended tuning voltage for a higher tuning range on the VCO. The device supports 3.3 V operation with a documented supply current of 29 mA, and it includes a 3-wire serial interface for programming the INT and FRAC divider values, reference divider ratio, charge pump current, and power-down state. Architecturally, the ADF4157 uses a digital phase frequency detector to compare the divided feedback signal with the reference, with the resulting error driving the charge pump and external loop filter. The Sigma-Delta fractional interpolator distributes the fractional division error over many PFD cycles, which spreads the fractional spurs away from the carrier and improves the close-in phase noise floor. This makes the device suitable for demanding frequency plans where a single high-performance RF PLL would otherwise be required. Typical applications include cellular and mmWave transceiver local oscillators, microwave and radar frequency generation, test and measurement instrumentation, wireless infrastructure base station synthesis, and satellite communication modems. The TSSOP-16 body, 4.40 mm wide with 0.173 inch lead span, fits standard surface-mount assembly flows. When designing around this synthesizer, plan the loop filter for the target reference and VCO, keep the VTUNE node short and shielded from digital return currents, and decouple the VP pin separately from VCC. Confirm that the VCO can be pulled across the full tuning range and that the charge pump current setting matches the loop bandwidth target. This page consolidates the manufacturer part details, verified distributor inventory channels, pin-compatible drop-in alternatives, and practical loop-filter and layout guidance that engineers typically have to assemble from several separate sources.

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ADF4159CCPZ - 13 GHz Fractional-N PLL Synthesizer | Analog Devices
ADF4159CCPZ

ADF4159CCPZ - 13 GHz Fractional-N PLL Synthesizer | Analog Devices

The Analog Devices ADF4159CCPZ is a 13 GHz fractional-N frequency synthesizer with modulation, fast and slow waveform generation, one CMOS output, and a 24-lead WFQFN exposed-pad package. It uses a 25-bit fixed modulus for subhertz frequency resolution, while its low-noise digital phase-frequency detector operates up to 110 MHz according to the manufacturer datasheet. The device accepts CMOS reference input and is intended for programmable clock, modulation, and waveform-generation systems. A frequency synthesizer is a clock-and-timing semiconductor that locks an output frequency to a stable reference. In the PLL hierarchy, the ADF4159 belongs to the fractional-N synthesizer and phase-locked-loop categories, combining a programmable reference divider, phase detector, charge pump, Sigma-Delta fractional interpolator, feedback dividers, and output drive circuitry. This allows a single device to generate a precisely controlled RF or clock output while retaining fine frequency adjustment. Key verified features include operation to 13 GHz, a 25-bit fixed modulus, direct modulation, fast-ramp waveform generation, and both fast and slow waveform generation. The listed supply conditions include AVDD and VP from 2.7 V to 3.45 V and DVDD and SDVDD at 1.8 V. These features make the synthesizer useful where an adjustable RF clock, modulation source, or test waveform is needed rather than a fixed-frequency oscillator. Technically, the PLL compares the divided feedback signal with the divided reference signal. Its digital PFD and charge pump drive the tuning path, while the Sigma-Delta fractional interpolator permits fine fractional frequency control. The verified data also identifies a 110 MHz PFD frequency. Values such as phase noise, lock time, reference input frequency range, output power, and temperature limits were not supplied and must be verified in the complete manufacturer datasheet before design release. Typical uses include RF and microwave signal generation, communications test equipment, clock modulation, laboratory waveform sources, and closed-loop systems requiring programmable frequency. In these applications, the 13 GHz ceiling provides broad tuning coverage, the fractional-N architecture provides fine resolution, and the waveform functions reduce the need for separate modulation circuitry. A key design consideration is loop-filter and reference implementation. The external loop filter, charge-pump settings, reference divider, feedback dividers, and output matching network must be designed together because they determine loop dynamics and spectral performance. RF routing also requires controlled impedance and careful separation of sensitive feedback and reference paths. This page combines verified manufacturer and distributor facts, a conservative drop-in assessment, package guidance, and engineering-focused comparison and design notes. It distinguishes documented values from missing data so engineers can review the part without relying on unverified specifications.

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ADF4169CCPZ - 13.5 GHz Fractional-N Synthesizer | Analog Devices
ADF4169CCPZ

ADF4169CCPZ - 13.5 GHz Fractional-N Synthesizer | Analog Devices

The Analog Devices ADF4169CCPZ is a 13.5 GHz fractional-N frequency synthesizer with modulation and fast and slow waveform generation capability in a 24-lead LFCSP-WQ surface-mount package. It uses a 25-bit fixed modulus to provide subhertz frequency resolution, while its low-noise digital phase-frequency detector, precision charge pump, and programmable reference divider support precision phase-locked-loop designs. A fractional-N frequency synthesizer is a clock-generation and timing IC that synthesizes an output frequency through a phase-locked loop. Its hierarchy extends from frequency synthesizer to phase-locked loop, clock and timing IC, and power-management-adjacent semiconductor. Unlike a simple integer-N divider, the ADF4169 supports fractional feedback division, allowing precise output-frequency settings without requiring an excessively high reference frequency. The ADF4169CCPZ supports a maximum synthesis frequency of 13.5 GHz and includes both fast and slow waveform generation for modulation. Its 25-bit fixed-modulus fractional architecture provides subhertz frequency resolution. The device also combines a low-noise digital phase-frequency detector and precision charge pump, features intended to support low phase noise and accurate loop operation in demanding RF signal chains. The device is suitable for frequency synthesis in RF communications, radar-related RF signal generation, test and measurement equipment, and other systems requiring programmable microwave or millimeter-wave-adjacent frequencies. Its fractional-N architecture is especially relevant when a system needs fine frequency granularity, rapid tuning, or controlled modulation rather than a fixed integer-divider output. A key design consideration is that fractional operation introduces fractional spurs. Designers should select the reference, loop filter, charge-pump settings, and output frequency carefully so that modulation requirements and spur performance can be met simultaneously. The external loop-filter component values and board layout should follow the manufacturer’s guidance rather than being selected from generic PLL assumptions. This page consolidates the verified 13.5 GHz frequency capability, 25-bit fractional architecture, package information, pricing reference, and application guidance for ADF4169CCPZ. It also distinguishes search-result comparison candidates from true drop-in alternatives because the supplied cross-reference data does not verify their package dimensions, pin assignments, or electrical compatibility.

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