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ADF4193BCPZ - 3.5 GHz Fast-Settling PLL Synthesizer | Analog Devices
ADF4193BCPZ

ADF4193BCPZ - 3.5 GHz Fast-Settling PLL Synthesizer | Analog Devices

The Analog Devices ADF4193BCPZ is a low-phase-noise, fast-settling RF PLL frequency synthesizer with a 300 MHz to 3.5 GHz input range, an output range up to 470 MHz, and a 32-lead WFQFN exposed-pad package. The device is designed for precision local-oscillator generation in wireless receiver and transmitter upconversion and downconversion paths. A phase-locked loop, or PLL, is a frequency-control IC that compares a divided reference signal with a feedback signal and drives a phase-adjustable voltage-controlled oscillator until the two match. Within clock and timing ICs, a PLL frequency synthesizer belongs to the broader phase-locked-loop, clock-generation, and signal-chain control hierarchy. It is commonly used where a stable, programmable, or coherent local oscillator is required. The Analog Devices ADF4193 datasheet describes a low-noise digital phase-frequency detector and a precision differential charge pump. Its dual-band loop architecture uses narrow-loop operation for low phase noise and wide-loop operation for rapid acquisition. A programmable 4-wire serial interface provides register control, while an external loop filter and reference clock determine many practical lock-time and phase-noise results. The differential charge-pump and selectable loop-bandwidth architecture are central engineering features. According to the Analog Devices ADF4193 datasheet, Rev. G, the narrow loop bandwidth supports low phase noise and spur performance, while the wide bandwidth permits faster settling before normal narrow-band operation resumes. The topology is intended to preserve low-noise operation after the acquisition phase. Typical uses include GSM and EDGE base-station local oscillators, wireless receiver and transmitter conversion chains, instrumentation requiring a programmable RF reference, and test equipment needing a phase-coherent output. The low-noise PFD and differential charge pump make the part suitable for systems where close carrier spacing, reference-spur control, or rapid frequency changes affect receiver sensitivity and transmitter fidelity. PCB implementation requires careful treatment of the exposed pad, supply connections, reference input, RF output, and loop-filter network. Keep the loop-filter components close to their associated pins, provide low-inductance ground and power return paths, and follow the manufacturer land-pattern and thermal-layout guidance. Reference spur performance can also depend on isolation between the VCO and the reference path. This page combines the manufacturer specifications, exact-MPN sourcing records, same-package comparison context, and practical PLL layout guidance. It highlights where a designer must evaluate loop-filter design, reference isolation, settling behavior, and thermal implementation rather than relying only on headline frequency and package figures.

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ADF4196BCPZ - 6 GHz Fast-Settling PLL | Analog Devices
ADF4196BCPZ

ADF4196BCPZ - 6 GHz Fast-Settling PLL | Analog Devices

Analog Devices ADF4196BCPZ is a low-phase-noise, fast-settling 6 GHz fractional-N PLL frequency synthesizer in a 32-lead WFQFN exposed-pad package. Its input frequency range extends from 400 MHz to 6 GHz, while its output frequency can reach 750 MHz. The device is intended for precision clock and local-oscillator generation where rapid acquisition, fractional-N frequency synthesis, and low phase noise are important. A phase-locked loop is a feedback-controlled frequency synthesizer. A PLL compares a divided reference signal with a feedback signal derived from its output, then adjusts a voltage-controlled oscillator until the two signals reach the required phase and frequency relationship. Fractional-N synthesis extends this architecture by dividing the feedback counter by a fractional value, allowing accurate synthesis without requiring a prohibitively high reference frequency or an extremely high prescaler ratio. The ADF4196 combines a fractional-N architecture with a stated maximum input frequency of 6 GHz. Its low-phase-noise design is valuable for receiver and transmitter local oscillators, where multiplier noise can degrade the useful signal-to-noise ratio. The fast-settling behavior is particularly relevant to frequency-stepping systems, including pulse Doppler radar and communication infrastructure operating under GSM/EDGE lock-time requirements. The ADF4196BCPZ uses a 32-lead exposed-pad package, providing 32 electrical connections plus a thermal and electrical land associated with the exposed pad. The package is supplied in tray format according to the product listing. Component selection should account for the complete PLL configuration: reference frequency, prescaler division, feedback division, integer and fractional settings, loop-filter values, output frequency range, and required lock time. Typical uses include wireless receiver and transmitter local oscillators, pulse Doppler radar frequency sources, base-station equipment, instrumentation, and test-and-measurement systems. In a local-oscillator implementation, the synthesizer generates a stable tone that is mixed with the received or transmitted signal to move it into or out of the desired frequency band. PCB implementation requires short, controlled- impedance connections, a carefully designed ground plane, clean separation between sensitive RF and digital control paths, and low-inductance placement of decoupling capacitors. The exposed pad should be connected to the appropriate ground or supply plane according to the device pinout and reference layout, and thermal performance should be checked under the highest expected operating frequency and output power. This product record combines the manufacturer identification, frequency range, package information, and application role of the ADF4196BCPZ with engineering guidance for PLL integration. Because no qualified same-package substitute was identified, the safest replacement decision is to evaluate the original ADF4196 family directly rather than assume that a similarly specified PLL is pin-to-pin compatible.

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ADF4208BRU - Dual 2 GHz Integer-N PLL | Analog Devices
ADF4208BRU

ADF4208BRU - Dual 2 GHz Integer-N PLL | Analog Devices

The Analog Devices ADF4208BRU is a dual RF phase-locked loop frequency synthesizer with a 2 GHz maximum input frequency, integer-N operation, and a 20-pin TSSOP package. Each synthesizer integrates a low-noise digital phase-frequency detector, precision charge pump, programmable reference divider, programmable A and B counters, and a selectable dual-modulus prescaler. The verified ADF4206/ADF4208 datasheet identifies the part specifically as a dual RF PLL frequency synthesizer intended for wireless receiver and transmitter local oscillators. A frequency synthesizer is a clock-generation and timing-control semiconductor that locks an output oscillator to a stable reference frequency. The ADF4208 belongs to the PLL, frequency synthesizer, clock generator, and phase-locked loop product hierarchy. Its two independent synthesizer channels can support separate local-oscillator paths in wireless upconversion and downconversion circuits, reducing the number of discrete frequency-generation blocks required on a radio board. The verified feature summary lists operation from 5 MHz to 2 GHz, a 5.5 V power supply, selectable charge-pump supply for extended tuning-voltage operation, selectable charge-pump currents for 3 V systems, and an on-chip oscillator circuit. The selectable dual-modulus prescaler and programmable A, B, and reference counters provide the integer-N frequency-planning controls needed to derive stable local-oscillator outputs from a common reference. Each PLL channel combines digital phase-frequency detection with a precision charge pump and programmable dividers. The charge pump controls the tuning interface to an external voltage-controlled oscillator, while the prescaler and integer counters define the multiplication ratio. The on-chip oscillator offers an additional reference-source option where the board architecture cannot provide a suitable external reference. The integrated architecture is intended to simplify RF local-oscillator design while retaining programmable division and charge-pump settings. Typical uses include wireless receiver and transmitter local oscillators, upconverter and downconverter synthesis, RF transceiver frequency generation, and other communications equipment requiring deterministic phase locking. The dual-channel arrangement is particularly useful where a radio requires two related or independent synthesized frequencies. Because the exact tuning range, phase-noise values, lock-time limits, and operating-temperature limits are not included in the supplied verified excerpts, engineers should consult the complete manufacturer datasheet before finalizing bandwidth, spur, and temperature-margin calculations. When laying out the ADF4208BRU, place the reference and RF input paths away from charge-pump and digital-control return currents. Use a clean, low-impedance ground reference and follow the manufacturer's recommended decoupling arrangement. The external VCO loop filter remains a critical RF design element because it determines phase noise, reference spurs, lock behavior, and tuning-range stability. Validate the complete loop rather than treating the PLL IC as an isolated clock block. This page consolidates the verified manufacturer and distributor information, separates known parameters from missing engineering data, and adds practical guidance for RF layout, PLL loop design, and device selection. It also documents the absence of verified drop-in replacements instead of presenting unverified or packaging-only MPN variants as drop-in alternatives.

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ADF4208BRUZ - 2 GHz Dual PLL Synthesizer | Analog Devices
ADF4208BRUZ

ADF4208BRUZ - 2 GHz Dual PLL Synthesizer | Analog Devices

The Analog Devices ADF4208BRUZ is a dual frequency synthesizer that combines two phase-locked loops, or PLLs, with a maximum synthesizer frequency of 2 GHz in a 20-lead TSSOP package. It is designed for wireless receiver and transmitter local-oscillator paths, where independent frequency synthesis is useful for upconversion and downconversion stages. The device uses CMOS-compatible signal connections, a selectable charge-pump supply, and selectable charge-pump currents. It operates from a 5.5 V power supply according to the manufacturer product description, while the charge-pump supply can be selected to support extended tuning-voltage operation and 3 V systems. A PLL frequency synthesizer is a timing IC that compares a reference signal with a divided feedback signal, drives a phase-frequency detector and charge pump, and locks a voltage-controlled oscillator to the target frequency. In the broader semiconductor hierarchy, a PLL belongs to the clock-and-timing IC family and ultimately to frequency-generation and phase-locking electronics. The ADF420x family targets radio-frequency signal chains in which a stable local oscillator is required for frequency conversion and channel selection. The ADF4208BRUZ provides a maximum output frequency of 2 GHz and incorporates two frequency-synthesizer circuits. Its low-noise digital phase-frequency detector supports the core locking function, while the charge-pump architecture controls the tuning interface to an external voltage-controlled oscillator. Selectable charge-pump current provides a means to balance loop bandwidth, phase-noise behavior, and reference-divider settings. The 3 V charge-pump option is particularly relevant to systems whose external VCO tuning range is limited. The 20-lead TSSOP package provides a compact surface-mount implementation for communications equipment. The manufacturer describes the ADF420x family as being used in the local-oscillator sections of wireless receivers and transmitters, where the dual architecture can support separate conversion paths or related synthesis functions. Its 2 GHz ceiling makes it applicable to RF systems operating below that frequency, including many cellular, microwave, and instrumentation signal chains. Typical applications include wireless receiver local oscillators, wireless transmitter upconversion chains, microwave downconversion stages, and low-phase-noise RF test equipment. The dual-synthesizer structure can also be useful in dual-band receivers, closed-loop reference systems, and communication modules that need two coordinated frequency sources. Care is required when choosing the reference, loop-filter components, RF output interface, and external VCO. For PCB implementation, use the manufacturer pin-description and test-point guidance when assigning the 20 TSSOP connections. Keep RF output and reference traces short, use a controlled ground return, and place loop-filter components close to their associated charge-pump and supply pins. The external VCO and feedback divider must support the intended output range, and the loop bandwidth should be calculated for the reference frequency and required phase-noise performance. This product page combines the manufacturer family description, distributor package information, strict same-package replacement analysis, application guidance, and design notes. It also distinguishes documented electrical facts from parameters that require confirmation against the complete ADF4208 datasheet, helping engineers plan RF layouts and drop-in evaluations efficiently.

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ADF4210BCP - 1.2 GHz Dual RF/IF PLL | Analog Devices
ADF4210BCP

ADF4210BCP - 1.2 GHz Dual RF/IF PLL | Analog Devices

Analog Devices ADF4210BCP is a dual RF/IF phase-locked-loop frequency synthesizer supporting input frequencies from 0 MHz to 1.2 GHz in a 20-lead LFCSP surface-mount package. It operates from a 2.7 V to 5.5 V power supply, includes a separate charge-pump supply that permits an extended tuning voltage in 3 V systems, and uses a three-wire serial interface for programming and control. A PLL, or phase-locked loop, is a frequency-control circuit that locks an output oscillator to a stable reference frequency. A frequency synthesizer expands that reference into programmable RF or IF frequencies for communication, instrumentation, broadcast, and test systems. Within the broader semiconductor hierarchy, the ADF4210BCP is a clock-and-timing IC, a frequency synthesizer, and ultimately a phase-locked-loop integrated circuit. Key features include a programmable dual-modulus prescaler with selectable RF and IF prescaler values of 8/9, 16/17, 32/33, or 64/65. Programmable RF and IF charge-pump currents support tuning-range adjustment. The device also provides analog and digital lock detection, a Fastlock mode for faster acquisition, and a power-down mode. These functions allow the synthesizer to be adapted to different reference frequencies, loop filters, and lock requirements. The ADF4210BCP combines an integer-N PLL architecture with programmable dual-modulus prescaling. Separate programming for the RF and IF paths allows one PLL to generate a range of output frequencies while supporting different prescaler ratios. The separate charge-pump supply, identified as VP, can extend the available tuning voltage beyond the principal supply level, which is useful when designing a low-voltage system around the device's 2.7 V minimum operating supply. Typical uses include RF and IF signal-chain synthesis in wireless receivers, transmitters, test equipment, and communications infrastructure. The 1.2 GHz maximum input frequency makes the device suitable for intermediate-frequency and radio-frequency synthesis stages where a programmable local oscillator or clock is required. Its three-wire serial interface simplifies connection to a host microcontroller, while digital lock detect provides a status signal for system sequencing. When designing a new board around the ADF4210BCP, verify the reference-divider ratio, prescaler selection, charge-pump current, loop-filter components, and required VCO tuning range before finalizing the schematic. The PLL reference and feedback paths are sensitive to noise, so use short, controlled-routing traces, adequate ground-plane connectivity, and appropriately placed loop-filter components according to the manufacturer datasheet. This product page consolidates the verified ADF4210 family information, distributor availability references, package details, and engineering design guidance into one searchable source. It also distinguishes confirmed device parameters from unavailable pricing and replacement data, helping engineers evaluate the ADF4210BCP without treating unverified values as manufacturer specifications.

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ADF4210BRU - 1.2 GHz Dual RF/IF PLL | Analog Devices
ADF4210BRU

ADF4210BRU - 1.2 GHz Dual RF/IF PLL | Analog Devices

Analog Devices ADF4210BRU is a dual RF/IF integer-N PLL frequency synthesizer with RF operation up to 550 MHz and IF operation up to 1.2 GHz, housed in a 20-lead TSSOP package. It operates from a 2.7 V to 5.5 V power supply and uses a separate charge-pump supply to support extended tuning-voltage operation in 3 V systems. The device provides programmable dual-modulus RF and IF prescalers, programmable charge-pump current, a 3-wire serial interface, analog and digital lock detection, Fastlock operation, and power-down capability. A phase-locked loop, or PLL, is a feedback-controlled frequency-generation circuit whose phase-locked output is referenced to an input oscillator. The ADF4210BRU belongs to the broader frequency synthesizer hierarchy, where a phase detector compares a divided feedback signal with a reference signal and the charge pump converts phase error into a tuning voltage for a voltage-controlled oscillator. This architecture allows a single synthesizer to support programmable frequency generation in RF and intermediate-frequency signal chains. The principal features are tightly aligned with demanding communications and frequency-generation designs. The 8/9, 16/17, 32/33, and 64/65 dual-modulus prescaler choices provide tradeoffs between division ratio and prescaler operating range. Programmable charge-pump current supports tuning-loop optimization, while the separate VP supply gives designers additional control over the tuning-voltage range. Analog and digital lock indicators provide both analog status information and a digital signal suitable for supervisory control. Fastlock operation allows the frequency synthesizer to change between programmed settings with reduced acquisition time compared with the normal lock sequence. The 3-wire serial interface supports programming through DATA, CLOCK, and LE functions, while power-down mode can reduce consumption when the synthesizer is not required. The industrial temperature grade and surface-mount TSSOP-20 package target compact, automated electronic assemblies, although the exact operating-temperature limits and package dimensions require confirmation in the manufacturer datasheet. Typical uses include local-oscillator generation for receivers, IF and RF frequency synthesis in communications equipment, frequency conversion in instrumentation, phase-related signal generation in industrial systems, and programmable local-oscillator architectures in test equipment. In each case, the combination of dual RF/IF synthesis, selectable prescalers, programmable charge-pump current, and lock-status reporting supports compact frequency-plan implementation. The main design consideration is the interaction among reference frequency, prescaler, charge-pump settings, loop filter components, and required lock time. Designers should use the manufacturer’s frequency-planning guidance and verify settling behavior in the final loop-filter implementation rather than assuming lock performance from the input frequency alone. The separate VP connection and external loop filter also require careful PCB layout to minimize noise and unwanted coupling. This product page combines the verified ADF4210 product-page capabilities with explicit data-availability limits, avoiding invented pricing, pin assignments, or lifecycle claims. It also distinguishes verified device functions from engineering assumptions that still require validation against the complete ADF4210 datasheet and the target reference oscillator, VCO, and loop-filter implementation.

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ADF4211BCP - Dual RF/IF Integer-N PLL | Analog Devices
ADF4211BCP

ADF4211BCP - Dual RF/IF Integer-N PLL | Analog Devices

The Analog Devices ADF4211BCP is a dual RF/IF integer-N PLL frequency synthesizer supporting inputs up to 2 GHz and operating from a 5.5 V supply in a 20-pin LFCSP package. The device provides separate RF and IF synthesis paths, programmable dual-modulus prescalers, programmable charge-pump currents, and a separate charge-pump supply for extended tuning-voltage operation. These features make it suitable for local oscillators, clock generation, modulation and demodulation systems, and dual-band RF signal chains. A PLL frequency synthesizer is a timing and frequency-control IC that locks a voltage-controlled oscillator to a stable reference frequency. Within the broader hierarchy, a PLL belongs to the clock and timing IC family, which supports frequency generation, phase management, distribution, and modulation. The ADF4211BCP combines a programmable integer-N divider, frequency comparison, charge-pump output, reference-frequency division, and RF/IF prescaling in one integrated circuit. Verified device features include RF and IF prescaler paths, programmable dual-modulus operation, programmable charge-pump currents, a 5.5 V power supply, and a separate VP charge-pump supply. The separate VP rail allows the tuning voltage to extend beyond the nominal operating range when higher-range VCO tuning is required. Programmable prescaler and charge-pump settings give the system designer control over divider ratios, phase-detector behavior, and loop-current selection. The ADF4211BCP belongs to the ADF4211 dual PLL family and is identified in available listings as a clock generator, PLL, or frequency synthesizer. The provided manufacturer-related search data confirms an input range from 0 MHz to 2 GHz and describes the device as a dual RF/IF PLL. Family documentation also identifies 0.5 GHz, 1.2 GHz, 2.0 GHz, 2.7 GHz, and 3.0 GHz operating-band combinations associated with the product family, although the exact enabled path and divider configuration must be confirmed in the manufacturer datasheet. Typical uses include RF transceiver local oscillators, IF signal generation, communication receivers and transmitters, test equipment, and dual-channel clock synthesis. The dual architecture allows two related synthesis paths to share a reference while supporting different output frequencies. Designers should select the appropriate prescaler, divider, charge-pump current, loop filter, reference divider, and VCO tuning range for the target output plan. The principal design consideration is loop stability. Component values must be derived from the selected prescaler, PFD frequency, charge-pump current, VCO gain, and required phase-noise performance. PCB return paths, ground-plane continuity, supply bypassing, and isolation between noisy digital control lines and sensitive RF outputs are also critical in high-frequency implementations. This product record combines the verified ADF4211BCP specifications, package information, sourcing links, candidate family comparisons, and practical PLL design guidance. It is intended to help engineers evaluate clock-generation and RF/IF synthesis requirements before completing reference-design and loop-filter validation.

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ADF4212BRU - Dual Integer-N 0.5/1.2GHz PLL | Analog Devices
ADF4212BRU

ADF4212BRU - Dual Integer-N 0.5/1.2GHz PLL | Analog Devices

The Analog Devices ADF4212BRU is a dual integer-N RF/IF phase-locked-loop frequency synthesizer with channel rates of 0.5 GHz/1.2 GHz, operating from a 2.7 V to 5.5 V supply and housed in a 20-pin TSSOP package. The device supports 3 V systems, provides programmable dual-modulus prescalers for RF and IF inputs, and offers programmable charge-pump currents for loop filtering and phase-noise optimization. A frequency synthesizer is a timing and control component that locks an output frequency to a stable reference by comparing a divided feedback signal with a reference oscillator. The phase-locked-loop, or PLL, hierarchy includes frequency synthesizer -> clock generator -> clock and timing IC -> integrated circuit. The ADF4212BRU occupies the RF/IF end of that hierarchy, where integer-N feedback division and phase comparison generate a controllable tuning voltage for an external voltage-controlled oscillator or frequency synthesizer core. The dual-channel architecture allows two independent RF or IF synthesis paths within one device. Separate charge-pump supply support permits extended tuning voltage where the system requires greater tuning range. According to the manufacturer product page and indexed datasheet material, the ADF4212 family supports programmable charge-pump currents and dual-modulus prescaling. These controls work with external loop-filter components, reference dividers, and feedback dividers to determine lock behavior, phase noise, and channel spacing. The ADF4212BRU is intended for RF and IF signal chains that require multiple related frequencies from a common reference. Typical uses include communications equipment, frequency conversion blocks, RF test and measurement systems, and instrumentation requiring precise phase alignment. The integer-N architecture favors channels that can be represented by integer division ratios relative to the reference frequency. Designers should account for the 2.7 V to 5.5 V supply range, preserve adequate headroom for the core, charge-pump, and external oscillator interfaces, and design the loop filter around the selected prescaler, charge-pump current, reference frequency, and required phase-noise performance. Printed-board layout must minimize reference and feedback-node noise coupling because both directly influence synthesized signal purity. This page consolidates verified manufacturer and distributor information, practical implementation guidance, procurement details, and a transparent assessment of replacement options. It also distinguishes confirmed product attributes from parameters that require checking in the current manufacturer datasheet before a board-level design is released.

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ADF4212BRUZ - 2.7GHz PLL Synthesizer | Analog Devices
ADF4212BRUZ

ADF4212BRUZ - 2.7GHz PLL Synthesizer | Analog Devices

Analog Devices ADF4212BRUZ is a dual phase-locked-loop clock and frequency synthesizer IC with a maximum RF/IF input frequency of 2.7 GHz, a programmable dual-modulus prescaler, and a 20-lead TSSOP package. It operates from a 2.7 V to 5.5 V power supply and uses a separate charge-pump supply to support extended tuning voltage in 3 V systems. A phase-locked loop, or PLL, is a frequency-control architecture that locks an output signal to a stable reference frequency. The ADF4212BRUZ combines phase-frequency detection, programmable dividers, charge-pump current sources, reference counters, and a three-wire serial programming interface. Together with an external voltage-controlled oscillator and loop filter, these functions form a complete programmable frequency synthesizer used to generate stable local oscillator signals. Key features include support for dual-modulus prescaler ratios of 8/9, 16/17, 32/33, and 64/65. The device provides programmable charge-pump currents, analog and digital lock detection, and Fastlock operation for improved acquisition behavior. Its reference architecture includes a 15-bit R counter, while the serial interface controls the on-chip registers. These features support adjustable synthesis ratios while retaining precise phase comparison against the reference input. The ADF4212 family is designed for RF and IF signal chains where multiple related frequencies must be derived from one reference source. The maximum RF/IF input frequency is 2.7 GHz, making the device suitable for communication equipment, test instruments, microwave subsystems, and frequency-conversion stages that operate below the upper RF/IF limit. The maximum prescaler input must also remain below the relevant CMOS counter limit during frequency planning. Typical uses include local oscillator generation for RF transceivers, IF synthesis in receivers, clocking for microwave conversion blocks, and programmable laboratory test equipment. In each case, the reference frequency, prescaler ratio, feedback divider, charge-pump current, and external loop filter jointly determine lock range, phase noise, spur performance, and settling behavior. Circuit design requires an external VCO and loop filter because the ADF4212BRUZ does not include a voltage-controlled oscillator. Component tolerances and parasitic effects in the charge-pump and feedback paths can affect tuning behavior, so component selection and PCB placement should follow the reference design and layout guidance in the manufacturer datasheet. The three-wire interface also requires correct logic levels and timing when driven by a host controller. This product page organizes the ADF4212BRUZ electrical limits, application guidance, package information, and drop-in comparison options into one engineering reference. It also highlights the distinctions between frequency-range variants and helps designers assess whether a same-family alternative preserves the required RF range, package, and pin configuration.

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ADF4213BCP - 3 GHz Dual RF/IF PLL Synthesizer | Analog Devices
ADF4213BCP

ADF4213BCP - 3 GHz Dual RF/IF PLL Synthesizer | Analog Devices

The Analog Devices ADF4213BCP is a dual RF/IF PLL frequency synthesizer with a 0 MHz to 3 GHz input range, programmable RF and IF outputs, and a 20-pin LFCSP package with an exposed pad. It operates from a 5.5 V power supply and includes a separate charge-pump supply to support extended tuning-voltage ranges. A PLL frequency synthesizer belongs to the clock and timing IC category. It generates a stable output frequency by phase-locking an output to a reference clock through a programmable frequency divider, a phase-frequency detector, a charge pump, a loop filter, and a voltage-controlled oscillator. Dual RF/IF architectures let one device support two related synthesis paths while providing programmable charge-pump currents and a programmable dual-modulus prescaler for RF and IF signal chains. The documented feature set includes 550 MHz/1.2 GHz, 550 MHz/2.0 GHz, 1.0 GHz/2.7 GHz, and 1.0 GHz/3 GHz frequency options. The separate VP charge-pump supply allows the tuning voltage to extend beyond the limits imposed by a single-supply implementation, which is useful when the VCO requires a wide tuning range. The device also supports 3 V systems and provides programmable RF and IF charge-pump currents. The ADF4213BCP is intended for RF and IF frequency generation in receivers, transmitters, upconverters, downconverters, and test equipment. Its dual-channel architecture is useful when a system must synthesize coherent RF and IF frequencies from a common reference, while the programmable prescaler supports different input-frequency divisions. The exposed pad permits thermal conduction through the PCB, although copper area, via placement, and thermal performance still require board-level validation. Designers should preserve loop-filter stability, reference-line cleanliness, and controlled impedance on RF and IF paths. Because the exact phase-noise figures, lock range, temperature limits, and pin-level register map were not supplied in the retrieved records, they should be confirmed against the current Analog Devices ADF4213 data sheet, Rev. A, before release. The separate charge-pump supply also requires careful sequencing and rail planning. This page consolidates the verified manufacturer, distributor, and cross-reference records into a structured product view. It adds application guidance, engineering considerations, comparison parameters, and sourcing context that are not presented together in a distributor catalog, while clearly identifying specifications that still require confirmation from the manufacturer documentation.

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ADF4213BRUZ - 3 GHz PLL Clock Synthesizer | Analog Devices
ADF4213BRUZ

ADF4213BRUZ - 3 GHz PLL Clock Synthesizer | Analog Devices

The Analog Devices ADF4213BRUZ is a single-channel PLL clock/frequency synthesizer IC capable of generating output frequencies up to 3 GHz. The device accepts a CMOS reference input, provides a clock output, and is housed in a 20-pin TSSOP package measuring approximately 0.173 inch by 4.40 mm in width. Its 3 GHz operating capability, programmable charge-pump supply, and support for 3 V systems make it suitable for RF and IF clock-generation designs. A PLL clock synthesizer, or phase-locked-loop frequency synthesizer, is a timing and clock-generation IC that compares a reference signal with a divided feedback signal. The loop then adjusts a controlled output until the phase and frequency relationship is correct. Within the integrated-circuit hierarchy, a PLL synthesizer belongs to clock and timing ICs, frequency synthesizers, and RF/IF signal-chain devices used to produce stable clocks for receivers, transmitters, converters, and test equipment. The ADF4213BRUZ supports reference inputs identified as CMOS and supplies a clock output. Its maximum frequency is 3 GHz, while the listed input-to-output ratio is 3:1. The device also includes a separate charge-pump supply, VP, allowing the tuning voltage to extend beyond the range of a conventional single-supply arrangement. This feature can improve tuning range in designs requiring broader frequency coverage or greater separation between adjacent channels. Analog Devices describes operation from 2.7 V to 5.5 V, with listed support for 3 V systems and a 5.5 V power-supply capability. The separate VP connection provides additional control over the internal charge-pump voltage, while the programmable charge-pump current supports tuning behavior. Because the device is a fractional-N architecture, engineers can obtain precise frequency ratios without requiring every output point to correspond to a direct integer division of the reference frequency. Typical applications include RF and IF signal chains, local oscillators, wireless transmitters and receivers, communication infrastructure, and frequency-generation modules. It is also appropriate for instrumentation requiring a programmable clock close to the 3 GHz operating limit. The TSSOP-20 surface-mount package supports compact board layouts, although RF trace control and careful grounding remain necessary when the output is used in high-frequency systems. The principal design consideration is the relationship between reference frequency, prescaler settings, feedback division, and the desired output. A phase-locked loop requires a valid reference and correctly configured divider values; otherwise, the synthesizer may fail to lock or produce an incorrect channel. Layout should minimize loop-board distance, maintain continuous return paths, and use controlled impedance for the output route when the clock has a high harmonic content. This product page combines the manufacturer-part identity, technical specifications, package details, application guidance, verified drop-in references, and practical selection considerations. It also distinguishes confirmed ADF4213BRUZ characteristics from alternatives requiring separate electrical and pin-level qualification before design substitution.

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ADF4216BRU - Dual Integer-N PLL Synthesizer 1.2 GHz | Analog Devices
ADF4216BRU

ADF4216BRU - Dual Integer-N PLL Synthesizer 1.2 GHz | Analog Devices

The Analog Devices ADF4216BRU is a dual RF PLL frequency synthesizer delivering a 550 MHz to 1.2 GHz RF output with an integer-N phase-locked loop architecture, packaged in a 20-lead TSSOP. It combines a low-noise digital phase frequency detector (PFD), a precision charge pump, programmable reference and RF/IF dividers, and a 3-wire serial interface in a single RF/IF local oscillator (LO) solution. A PLL frequency synthesizer is a closed-loop timing device in which a voltage-controlled oscillator (VCO) output is phase- and frequency-locked to a stable reference source through a phase frequency detector and charge pump. It sits in the RF and IF signal chain of wireless transmitters and receivers, converting a single low-frequency reference into the high, spectrally pure local oscillator tones required for up-conversion and down-conversion. The hierarchy runs from phase-locked loop to frequency synthesizer to clock and timing IC to integrated circuit. The ADF4216 supports programmable reference, RF, and IF N-divider ratios, selectable charge pump currents, and selectable dual-modulus prescalers of 16/17 for the IF chain and 64/65 for the RF chain. Because the loop is integer-N, the synthesizer frequency is the reference frequency multiplied by an integer ratio, giving excellent phase noise and very low reference feedthrough at the cost of fractional-N flexibility. A dedicated power-down mode shuts the part down for leakage control between burst transmissions. Operated from a 3 V to 5.5 V supply, the device integrates everything a designer needs for a dual-LO transceiver front end: two independent synthesizer channels that can drive both the RF and IF sections of a wireless receiver or transmitter. The 3-wire serial interface allows the divider ratios, prescaler, charge pump, and counter settings to be loaded from a host microcontroller or baseband processor. Typical applications include GSM and CDMA wireless handsets, wireless local loop and base-station equipment, WCDMA and TD-SCDMA transceiver front ends, RFID readers, microwave and satellite up/down converters, and instrumentation. In each case the device replaces separate oscillators and dividers while tightening phase noise and reducing board area. When designing around the ADF4216, pay close attention to loop filter component selection, reference phase noise, and the charge pump setting. A mismatched charge pump current and bandwidth combination produces high reference spurs, while an aggressive loop bandwidth trades phase noise for lock time. Keep the reference and RF traces short and well decoupled, and follow the grounding and decoupling layout recommended in the manufacturer datasheet. This page combines verified distributor and manufacturer information with drop-in alternatives, a parameter-by-parameter comparison table, and practical design notes that go beyond the raw datasheet tables, helping engineers shortlist, source, and lay out the part with confidence.

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ADF4218BRU - 2.5GHz Dual RF PLL Synthesizer | Analog Devices
ADF4218BRU

ADF4218BRU - 2.5GHz Dual RF PLL Synthesizer | Analog Devices

The Analog Devices ADF4218BRU is a dual, integer-N RF PLL frequency synthesizer covering 550 MHz to 2.5 GHz, with a 2.7 V to 5.5 V supply and a 20-pin TSSOP package. It provides independent synthesizers for RF and IF local oscillators in wireless receiver and transmitter circuits, using a low-noise digital phase-frequency detector, precision charge pump, programmable reference divider, programmable integer divider, and selectable dual-modulus prescaler. A phase-locked loop, or PLL, is a feedback-controlled timing circuit that locks an output oscillator to a stable reference frequency. The oscillator and voltage-controlled oscillator form the complete frequency synthesizer, while the ADF4218BRU handles reference division, phase detection, charge-pump current generation, programmable integer-N division, and prescaling. In the wider semiconductor hierarchy, it is a clock-and-timing IC and frequency synthesizer used for RF signal generation and frequency conversion. The device supports RF prescaler choices of 16/17 or 64/65 and selectable charge-pump currents. Its three-wire serial interface allows reference frequency, prescaler, integer-N counter, charge-pump, and band-select programming. Available dual-synthesizer configurations include 550 MHz/1.2 GHz, 550 MHz/2.0 GHz, and 550 MHz/2.5 GHz, depending on the selected variant and operating setup. Each synthesizer path uses a digital phase-frequency detector to compare a divided feedback signal with the divided reference. The resulting phase error drives the charge pump and external loop filter, which in turn control a VCO. Designers select loop bandwidth, reference division, charge-pump current, and filter components to balance phase noise, lock time, spur performance, and reference-multiplier requirements. Typical uses include wireless handset RF and IF local oscillators, GSM receivers and transmitters, wireless infrastructure, instrumentation, and other RF up-conversion or down-conversion systems. The 20-pin TSSOP package is also suitable for compact, surface-mounted frequency-generation boards where the external VCO and loop filter can be placed close to the RF signal path. When designing around the ADF4218BRU, preserve the datasheet-specified decoupling and keep the reference, loop-filter, and VCO connections compact. The integrated divider and detector simplify frequency planning, but phase noise, lock range, and spur performance still depend heavily on the external VCO, loop filter, reference quality, and board layout. This page combines verified manufacturer and distributor information with practical PLL design considerations, source-backed alternatives, and a parameter comparison. It highlights where the ADF4218BRU fits and where ADF4216BRU, ADF4217BRU, or the web-referenced ADF4212LBRUZ-RL may require further qualification before substitution.

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ADF4251BCP - 3.0 GHz Fractional-N Synthesizer | Analog Devices
ADF4251BCP

ADF4251BCP - 3.0 GHz Fractional-N Synthesizer | Analog Devices

Analog Devices ADF4251BCP is a dual fractional-N/integer-N frequency synthesizer with 3.0 GHz fractional-N operation, 1.2 GHz integer-N operation, and a 3.3 V power supply in a 24-terminal surface-mount chip carrier package. It combines fractional-N or integer-N synthesis with programmable dual-modulus prescalers, a 3-wire serial interface, programmable charge-pump currents, digital lock detect, and power-down control. A frequency synthesizer is a timing IC that generates a controlled output frequency from a stable reference. A fractional-N synthesizer can achieve fractional division ratios while retaining the coarse tuning range associated with integer-N architecture. Within the broader hierarchy, the ADF4251BCP is a PLL frequency synthesizer, a clock-and-timing IC, and a semiconductor intended for RF local-oscillator generation and signal conversion. Key features include RF prescaler options of 4/5 and 8/9, a programmable IF prescaler, and a separate charge-pump supply that permits an extended tuning voltage. The 3-wire serial interface enables digital programming, while digital lock detect provides a hardware indication of synthesizer lock status. These controls are useful when the oscillator must be adjusted in real time or monitored by a host controller. The synthesizer is intended to operate with an external voltage-controlled oscillator and loop filter, completing a phase-locked-loop implementation. Its fractional-N maximum operating frequency is 3.0 GHz, whereas its integer-N maximum is 1.2 GHz. The supplied source information does not provide the complete prescaler selection matrix, reference-frequency limits, minimum channel spacing, phase-noise values, tuning-voltage limits, or register map, so those values remain unverified in this record. Typical uses include RF local oscillators, upconversion and downconversion paths, wireless communication infrastructure, test-and-measurement equipment, and frequency-generation systems. The separate VP connection can be valuable when the external VCO and loop-filter design requires a tuning voltage beyond the range supported by the synthesizer supply itself. Designers should treat the ADF4251BCP as the synthesizer element rather than a complete standalone oscillator. The external VCO, loop filter, reference source, decoupling network, and controlled impedance layout directly determine lock range, phase noise, spur performance, and tuning accuracy. Verify all register settings and interface timing against the manufacturer datasheet before firmware and PCB release. This product record combines verified manufacturer capabilities, distributor availability references, package information, application guidance, and a strict comparison of the ADF4251 family. It also separates documented facts from unavailable electrical details, helping engineers evaluate the ADF4251BCP without introducing unverified substitute or pricing claims.

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ADF4252BCP - 3 GHz Dual Fractional-N PLL | Analog Devices
ADF4252BCP

ADF4252BCP - 3 GHz Dual Fractional-N PLL | Analog Devices

The Analog Devices ADF4252BCP is a dual fractional-N/integer-N frequency synthesizer with RF operation up to 3 GHz, integer-N operation up to 1 GHz, and a 24-lead LFCSP package with exposed pad. It operates from a 3.3 V power supply, provides a separate VP connection for extended tuning voltage up to 5 V, and provides programmable RF prescalers of 4/5 and 8/9. Its three-wire serial interface supports digital programming of the dual synthesizer architecture. A frequency synthesizer is a clock-and-timing integrated circuit that generates a programmable output frequency from a stable reference. The ADF4252 belongs to the phase-locked-loop hierarchy: fractional-N or integer-N frequency synthesizer → phase-locked loop → clock generator and timing IC. This type of device is used when an RF system requires a locally controlled oscillator with fine frequency resolution and direct digital programming. The dual architecture permits independent RF and IF synthesis paths, which is valuable in wireless receivers and transmitters requiring both an RF local oscillator and an intermediate-frequency local oscillator. The RF section reaches 3 GHz, while the integer-N range reaches 1 GHz. The programmable dual-modulus prescaler supports integer-N and fractional-N operation, and programmable charge-pump currents allow loop behavior to be adapted for different reference and phase-noise requirements. A reported phase-noise figure of 103 dBc/Hz at a 5 kHz offset is identified for GSM-related operation. The manufacturer data sheet also describes a narrow-loop filter configuration intended to meet steady-state spurious specifications, using the lowest charge-pump current for normal operation and the maximum setting during a fast-lock frequency jump. This technique separates acquisition performance from final steady-state performance. Typical applications include RF upconversion and downconversion in wireless receivers, RF transmitters, GSM-compatible communication equipment, instrumentation, and other systems requiring independently programmed RF and IF local oscillators. The 3.3 V core supply and programmable serial interface simplify integration with embedded control hardware. A key design consideration is reference and loop planning. The reference frequency, prescaler, feedback divider, charge-pump current, and loop-filter values must be selected together to meet both phase-noise and lock-time targets. The separate VP supply should also be evaluated against the required tuning-voltage range rather than assumed to follow the digital supply automatically. This page consolidates the verified manufacturer specifications, distributor information, package details, replacement findings, and practical design considerations into one engineering-oriented reference for evaluating the ADF4252BCP in RF and IF frequency-generation systems.

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ADF4252BCPZ - 3 GHz Dual Fractional-N PLL | Analog Devices
ADF4252BCPZ

ADF4252BCPZ - 3 GHz Dual Fractional-N PLL | Analog Devices

The Analog Devices ADF4252BCPZ is a dual fractional-N and integer-N frequency synthesizer with a maximum frequency of 3 GHz, housed in a 24-lead WFQFN exposed-pad CSP package. It generates independent RF and IF local-oscillator signals for wireless receiver and transmitter systems. The RF synthesizer uses a sigma-delta fractional-N architecture, while the device also supports integer-N operation for applications requiring integer frequency division. A frequency synthesizer is a timing-control semiconductor that uses a phase-locked loop, or PLL, to convert a stable reference frequency into an accurately programmable output. In its dual-channel form, the ADF4252 supports two synthesis paths within one package, reducing board area in RF and IF chains that require multiple local oscillators. The device must be paired with an external voltage-controlled oscillator and loop filter to complete each PLL. The ADF4252BCPZ features a programmable reference divider, a low-noise digital phase-frequency detector, and a precision charge pump in each synthesizer section. Its fractional-N RF channel allows fine frequency resolution without requiring an unusually high reference frequency. The manufacturer documentation also describes fast-lock operation, where the charge-pump current is increased during a frequency jump and then returned to the setting required for narrow-loop steady-state spurious performance. Control uses a simple SPI-compatible serial interface. The serial data input, serial clock, and latch-enable signals transfer 24-bit words into the appropriate internal latch. This architecture permits programming of divider, charge-pump, reference, and fractional-N settings from a host microcontroller or programmable-logic controller. Register-map details, timing, and recommended control sequences should be implemented from the manufacturer datasheet. Typical applications include wireless transceiver local oscillators, IF conversion stages, radio-frequency test equipment, microwave communication links, and instrumentation requiring independent programmable RF and IF frequencies. The integrated dual-synthesizer architecture is especially useful when board area is constrained but two phase-locked loops are required. A successful design must account for reference-clock jitter, loop-filter bandwidth, VCO phase noise, charge-pump current, RF output power, supply sequencing, and the exposed-pad thermal path. Place input and output decoupling capacitors close to their associated pins, keep the SPI routing compact and ground-referenced, and provide a low-impedance ground connection to the exposed pad. This product page consolidates the manufacturer's device description, package information, interface details, replacement guidance, and application-specific design guidance into a focused engineering reference for evaluating the ADF4252BCPZ in a dual-PLL RF design.

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ADF4350BCPZ - Wideband Synthesizer w/ Integrated VCO | ADI
ADF4350BCPZ

ADF4350BCPZ - Wideband Synthesizer w/ Integrated VCO | ADI

The Analog Devices ADF4350BCPZ is a wideband frequency synthesizer with an integrated voltage controlled oscillator (VCO) that operates on a fundamental output frequency range of 2200 MHz to 4400 MHz. Housed in a 32-lead LFCSP (5 mm x 5 mm) exposed-pad package, the part enables fractional-N or integer-N phase-locked loop (PLL) implementations when paired with an external loop filter and an external reference frequency. Divide-by-1/2/4/8/16 output dividers extend usable RF outputs as low as 137.5 MHz. A PLL frequency synthesizer is a closed-loop feedback system that compares a divided VCO output to a reference oscillator and adjusts the VCO tuning voltage until the divided frequency phase-locks to the reference. Fractional-N division enables finer frequency resolution than integer-N at the cost of additional noise-shaping circuitry, while integer-N mode delivers the lowest in-band phase noise. ADF4350 supports both modes, letting engineers trade off resolution against phase-noise performance for applications ranging from cellular base stations to test instrumentation. Key features include an output frequency span of 137.5 MHz to 4400 MHz, a 3-wire SPI-compatible serial interface for register programming, an auxiliary RF output that can be muted independently, and a phase-frequency detector (PFD) that supports reference frequencies up to 200 MHz. The integrated VCO eliminates the need for a discrete resonator, simplifying BOM and reducing board area in radio designs. According to the Analog Devices datasheet, the part supports channel spacing down to a sub-1 Hz resolution when used in fractional-N mode with proper modulator settings. The architecture combines a high-resolution sigma-delta modulator, a low-noise charge-pump, and a wideband VCO that is prescaled for stable locking across process and temperature variations. The mute function is both pin- and software-controllable, allowing the part to be shut down during idle periods in time-division duplex systems to save power. Typical applications include cellular base-station transceivers (GSM, UMTS, LTE, 5G FR1), microwave point-to-point and point-to-multipoint links, satellite communications up-converters, wireless backhaul infrastructure, and bench-top RF signal generators. The 32-lead LFCSP package provides a compact thermal envelope suitable for dense multi-radio boards. When designing with the ADF4350BCPZ, route the charge-pump supply through a ferrite bead and bypass it with a 10 nF cap to minimize reference spurs, and place the loop-filter components as close to the CP and VT pins as practical. Avoid routing digital SPI lines adjacent to the RF outputs to prevent crosstalk into the synthesized spectrum. This page synthesizes distributor pricing, drop-in alternatives drawn from the Analog Devices family, and practical layout notes that complement - but do not replace - the manufacturer datasheet.

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ADF4351BCPZ - 4.4 GHz Fractional-N PLL Synthesizer | Analog Devices
ADF4351BCPZ

ADF4351BCPZ - 4.4 GHz Fractional-N PLL Synthesizer | Analog Devices

The Analog Devices ADF4351BCPZ is a fractional-N or integer-N phase-locked-loop frequency synthesizer with an integrated voltage-controlled oscillator, a 2.2 GHz to 4.4 GHz fundamental VCO range, and operation up to 4.4 GHz. The device accepts a 10 MHz to 250 MHz reference input and is supplied in a 32-lead VFQFN exposed-pad package. It supports programmable integer and fractional frequency synthesis through an external reference and loop filter. An RF frequency synthesizer generates a stable, programmable output by locking a voltage-controlled oscillator to a reference through a phase-locked loop. The ADF4351 belongs to the PLL synthesizer and clock-generator hierarchy, integrating the synthesizer, VCO, programmable dividers, reference and feedback paths, and RF output circuitry. This integration reduces board-level design effort while retaining the flexibility required for external loop-filter optimization. According to the Analog Devices product page and datasheet, the ADF4351 supports fractional-N and integer-N synthesis, includes an integrated VCO, and is intended for wideband RF applications. The 10 MHz to 250 MHz input range and 2.2 GHz to 4.4 GHz fundamental VCO range make it suitable for microwave communication, wireless infrastructure, test equipment, radar-related RF signal chains, and frequency-agile RF systems. Its fractional-N operation permits fine frequency resolution when the reference and N-divider settings are selected appropriately. The device requires an external loop filter and external reference frequency. Filter component selection affects loop bandwidth, phase noise, reference-spur behavior, lock time, and the amount of ripple presented to the VCO control node. Designers should evaluate loop dynamics for each output frequency rather than assuming one filter network is optimal across the full 2.2 GHz to 4.4 GHz range. The exposed pad provides the required thermal and electrical connection to the PCB. Typical implementation places the ADF4351 between a stable reference source and an RF load or receiver/transmitter signal chain. The output can be filtered, buffered, or mixed according to the system requirement. Keep the reference and loop-filter connections short, provide clean supply decoupling, and use a controlled-impedance RF layout for the output path. Verify phase noise, spur levels, lock behavior, output power, and temperature performance with the final reference and filter implementation. For direct replacement, verify package dimensions, exposed-pad construction, pin assignments, register compatibility, reference range, VCO range, and supply limits. A similar frequency range alone is insufficient for drop-in use. This page combines verified manufacturer and distributor information with practical PLL design considerations, comparison fields, and sourcing-oriented FAQ answers. Pricing and availability should be confirmed with authorized distributors as of 2026-10-21.

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ADF4355BCPZ - 6.8GHz Fractional-N PLL | Analog Devices
ADF4355BCPZ

ADF4355BCPZ - 6.8GHz Fractional-N PLL | Analog Devices

Analog Devices ADF4355BCPZ is a fractional-N or integer-N phase-locked-loop frequency synthesizer with an integrated voltage-controlled oscillator, an RF output range of 54 MHz to 6800 MHz, and a 32-WFQFN exposed-pad package. The device supports 1.8 V logic compatibility, 3.3 V analog and digital supplies, and typically 5.0 V charge-pump and VCO supplies. Its programmable output division ratios are 1, 2, 4, 8, 16, 32, or 64, while the dual-modulus prescaler and 38-bit modulus support fine frequency resolution. A fractional-N frequency synthesizer generates a stable, programmable output frequency by combining a phase-locked loop, a frequency divider, and a high-resolution modulus. The ADF4355 belongs to the broader hierarchy of clock-generation ICs, frequency synthesizers, phase-locked loops, and RF timing components. Integrating the VCO reduces the number of external microwave components needed to implement a tunable local oscillator, although an external reference, loop filter, and passive matching network are still required. Key features include operation to 6.8 GHz, low phase noise from the integrated VCO, programmable charge-pump current, programmable reference dividers, digital and analog lock detection, and hardware or software power-down. The 38-bit modulus permits fractional-N synthesis with high nominal frequency resolution. Programmable output division extends the usable RF range and allows integer-N or fractional-N configurations to be selected according to phase-noise, spur, and tuning requirements. Technically, the ADF4355 uses an integrated wideband VCO with programmable output division and a dual-modulus prescaler for fractional-N operation. The reference path divides an external source before phase comparison with the divided VCO output. An external passive loop filter converts the phase-detector charge-pump current into the control voltage applied to the VCO. The exact loop bandwidth, reference ratio, and filter values therefore determine lock range, settling time, phase noise, and fractional-N spur performance. Typical applications include microwave and millimeter-wave test equipment, frequency conversion in communications receivers, local-oscillator generation for RF front ends, radar or satellite signal-chain prototypes, and instrumentation requiring programmable RF outputs. The integrated VCO is particularly useful where a fixed local-oscillator module would be too restrictive or where several frequencies must be generated from one reference source. The exposed thermal pad must be connected to a low-impedance ground plane, and the RF output requires careful impedance-controlled routing. Component placement should minimize loop-filter area and keep sensitive control and supply paths away from the RF output. Designers must also verify regulator tolerances, charge-pump settings, reference phase noise, and loop-filter calculations before operation across the full frequency range.

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ADF4371BCCZ - 32 GHz Wideband PLL Synthesizer | Analog Devices
ADF4371BCCZ

ADF4371BCCZ - 32 GHz Wideband PLL Synthesizer | Analog Devices

Analog Devices ADF4371BCCZ is a 32 GHz wideband microwave PLL frequency synthesizer with an integrated voltage-controlled oscillator, operating as either an Integer-N or fractional-N synthesizer. Its RF output spans 62.5 MHz to 32,000 MHz, while the external reference input range is 10 MHz to 600 MHz. The device is packaged in a 48-pin TFLGA with an exposed pad. A phase-locked-loop frequency synthesizer generates a stable, programmable RF frequency by locking a voltage-controlled oscillator to a stable reference. The ADF4371 belongs to the PLL frequency synthesizer and clock generator category, where it combines an integrated microwave VCO, phase detector, programmable divider chain, reference input, and synthesizer control functions. It supports fractional-N operation with a 39-bit fractional modulus, providing finer frequency resolution than integer-only division. Key features include a continuous RF output range of 62.5 MHz to 32 GHz, support for both Integer-N and fractional-N synthesis, and a 39-bit fractional modulus. An external reference and external loop filter allow the system designer to establish the reference source and tune loop dynamics. The integrated VCO reduces the number of external microwave oscillator components required for broadband RF signal generation. The ADF4371 architecture supports a 10 MHz to 600 MHz reference input range. Reference selection influences phase-noise performance, frequency stability, and synthesis accuracy, while the loop filter determines transient response and phase-noise behavior. The fractional-N architecture permits smaller frequency steps than an Integer-N-only implementation, although loop-filter design and digital calibration behavior must be evaluated against the required channel spacing and spurious specifications. Typical applications include microwave and millimeter-wave signal generation, communications test equipment, radar test systems, frequency-conversion chains, and local-oscillator generation covering the 62.5 MHz to 32 GHz range. The wide tuning span makes the device useful where one synthesizer must support multiple instrumentation bands rather than a fixed narrow frequency plan. The primary design consideration is the external loop filter. Its component values, charge-pump current, reference-divider settings, and feedback-divider ratio must be coordinated with the intended output frequency and phase-noise target. RF routing also requires controlled impedance and short return paths around the exposed-pad thermal and grounding structure. This product page combines the ADF4371BCCZ manufacturer specifications, package details, sourcing guidance, technical applications, comparison points, and practical design considerations into one engineering-focused reference for synthesizer implementation.

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ADF4372BCCZ - 62.5MHz-16GHz Integer-N PLL with Integrated VCO | Analog Devices
ADF4372BCCZ

ADF4372BCCZ - 62.5MHz-16GHz Integer-N PLL with Integrated VCO | Analog Devices

The Analog Devices ADF4372BCCZ is a wideband microwave integer-N phase-locked loop (PLL) frequency synthesizer with an integrated voltage-controlled oscillator (VCO), generating output frequencies from 62.5 MHz to 16 GHz in a 48-lead TFLGA package with exposed pad. The VCO core operates from 4000 MHz to 8000 MHz, and an internal multiplier extends coverage to 8 GHz to 16 GHz, while an output divide chain of 1, 2, 4, 8, 16, 32, or 64 extends the low end down to 62.5 MHz at RF8x. A PLL frequency synthesizer is a closed-loop timing device: a phase-frequency detector compares a divided output against a stable reference, and a charge pump plus loop filter converts the phase error into a tuning voltage that steers the internal VCO. When used with an external reference and an external loop filter, the ADF4372 supports both fractional-N and integer-N synthesis architectures, a hybrid approach in which a programmable fractional modulus shapes the reference ratio so the output can land on frequencies that are not integer multiples of the reference. Key features include a 62.5 MHz to 16 GHz total tuning range in a single monolithic part, double-buffered registers for FRAC1, MOD2, FRAC2, reference doubler, reference divide-by-2, R counter, and charge pump current settings, and a low-noise charge pump that drives the external loop filter. Because the reference divider, fractional modulus, and charge pump current are all double buffered, the synthesizer can be retuned without dropping out of lock, which is essential for fast frequency switching in test equipment and microwave front ends. The device accepts an external reference frequency and requires an external loop filter, giving the designer freedom to trade phase noise against lock time and reference multiplication ratio. Its architecture deliberately separates the reference path from the RF path: the R counter sets the reference division, while the N counter and fractional fields set the feedback division, so the synthesizer can be configured without changing the reference source. Typical applications include 5G and microwave radio base-station and backhaul frequency generation, radar and electronic warfare test benches, wideband test and measurement instrumentation, satellite and VSAT up-converters, and microwave front-end local oscillator synthesis for phased-array receivers and 5G mmWave radio units. When designing with the ADF4372BCCZ, budget loop-filter components against the target lock time and phase-noise mask, and keep the VCO supply and reference paths on separate, well-decoupled rails because supply ripple at the VCO supply pin directly multiplies into phase noise. The exposed pad must be soldered to a solid ground plane for both thermal and return-path reasons. This page consolidates the manufacturer specifications, package and pin details, drop-in alternatives, and hands-on design guidance for the ADF4372BCCZ into one engineering reference, adding the comparison and integration detail that the datasheet leaves to the reader.

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ADF5000BCPZ - 18 GHz Divide-by-2 RF Prescaler | Analog Devices
ADF5000BCPZ

ADF5000BCPZ - 18 GHz Divide-by-2 RF Prescaler | Analog Devices

The Analog Devices ADF5000BCPZ is an 18 GHz, divide-by-2 RF prescaler IC with differential 100 ohm outputs, supplied in a 16-lead WFQFN exposed-pad package. It operates from a 3.3 V supply and is designed to divide high-frequency RF signals down to a frequency suitable for a PLL frequency synthesizer or frequency divider. An RF prescaler is a clock-and-timing semiconductor that divides an input carrier into a lower-frequency signal while preserving the phase relationship needed by phase-locked loops. The ADF5000 belongs to the RF prescaler hierarchy, where it serves as a fixed divide-by-2 block ahead of a PLL such as the ADF4156 or ADF4106. Its differential outputs reduce common-mode effects and provide a suitable interface to compatible RF clock circuits. The primary features of the ADF5000BCPZ include operation to 18 GHz, a fixed divide-by-2 function, low-noise and low-power operation, a 3.3 V supply requirement, and differential 100 ohm RF outputs. These characteristics make it particularly useful when a synthesizer requires an RF input above the native frequency range of its PLL front end. The exposed pad also provides the primary thermal path when used in space-constrained microwave assemblies. Technically, the ADF5000 is intended as a fixed divider rather than a programmable integer divider. Its divide ratio is not selected by a register or external control interface. The RF signal therefore enters the prescaler, is divided by two, and exits through the differential output network for subsequent phase comparison or frequency measurement. The verified manufacturer documentation identifies the ADF4156 and ADF4106 as example downstream PLL devices. Typical applications include microwave synthesizer subsystems, phase-locked-loop reference chains, RF test and measurement equipment, wireless infrastructure, satellite communications, and instrumentation requiring division of carrier frequencies into a range accepted by a PLL or counter. The differential 100 ohm output arrangement is particularly valuable in controlled-impedance RF layouts. Designers should preserve controlled impedance on the RF input and output paths, provide the supply decoupling specified by the manufacturer datasheet, and validate the exposed-pad thermal design at the highest operating frequency. RF trace geometry, return paths, component placement, and ground-plane continuity can materially affect divider performance at microwave frequencies. This product page combines the verified manufacturer specifications, distributor availability, purchasing guidance, comparison fields, and practical RF design considerations. Missing electrical details are explicitly identified rather than inferred, allowing engineers to evaluate the ADF5000BCPZ against the requirements of their specific microwave design.

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ADF5002BCPZ - 4-18 GHz Divide-by-8 RF Prescaler | Analog Devices
ADF5002BCPZ

ADF5002BCPZ - 4-18 GHz Divide-by-8 RF Prescaler | Analog Devices

Analog Devices ADF5002BCPZ is a fixed divide-by-8 RF prescaler IC designed for frequencies from 4 GHz to 18 GHz. It operates from a 3.3 V supply and provides differential 100 ohm RF outputs, making it suitable for dividing a high-frequency signal down to a lower frequency suitable for a PLL input. The device is packaged in a 16-WFQFN exposed-pad package. An RF prescaler is a frequency divider block used in radio-frequency signal chains. It belongs to the broader clock-and-timing IC hierarchy, where a prescaler can be used ahead of a phase-locked loop to divide down microwave or millimeter-wave signals. The ADF5002 provides a fixed divide-by-8 function for applications requiring predictable division ratio and direct connection to compatible PLL frequency synthesizers. The ADF5002 is positioned as a low-noise, low-power RF divider block. Its specified operating frequency range extends to 18 GHz, while the 3.3 V supply supports integration into RF and microwave systems requiring a divided reference or feedback signal. Differential 100 ohm RF outputs are intended for direct interfacing with RF circuitry when the board-level impedance and termination requirements are satisfied. The fixed divide-by-8 architecture makes this part most useful when the system frequency plan can accommodate an eightfold reduction. Using the prescaler before a PLL can lower the frequency presented to the synthesizer while preserving the relationship between the RF signal and the generated reference. Signal integrity, grounding, supply decoupling, and output matching remain important because RF divider performance is influenced by the complete transmission-line environment. Typical applications include microwave and millimeter-wave downconversion, RF instrumentation, synthetic-frequency generation, test equipment, and communications equipment using a compatible PLL such as the ADF4156 or ADF4106. The divider can also support frequency-counter and measurement architectures where a high-frequency signal must be reduced before further processing. When designing around the ADF5002BCPZ, preserve the manufacturer-recommended RF trace geometry and provide a low-impedance return path for the differential outputs. Verify the complete frequency plan before selecting the device: the input must fall within the 4 GHz to 18 GHz operating range, and the divided output must remain suitable for the downstream PLL or counter. Use the manufacturer datasheet and its recommended application circuit when defining impedance, bypass capacitance, and exposed-pad thermal connections.

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ADF5355BCPZ - 13.6 GHz Integrated VCO PLL | Analog Devices
ADF5355BCPZ

ADF5355BCPZ - 13.6 GHz Integrated VCO PLL | Analog Devices

The Analog Devices ADF5355BCPZ is a microwave wideband frequency synthesizer with an integrated voltage-controlled oscillator, operating up to 13.6 GHz and housed in a 32-pin WFQFN exposed-pad package. It supports fractional-N and integer-N phase-locked-loop architectures, with a three-wire register interface, digital lock detection, programmable output muting, and hardware and software power-down functions. A phase-locked loop is a feedback-controlled frequency-generation system that compares a divided reference signal with a synthesized output and drives a voltage-controlled oscillator toward phase and frequency lock. The ADF5355 integrates the oscillator core, programmable frequency dividers, charge-pump circuitry, reference and feedback paths, and digital control into one RF synthesizer. This placement within the clock-and-timing and frequency-generation hierarchy simplifies microwave signal-source designs compared with a discrete VCO and divider arrangement. Principal features include fractional-N operation for fine frequency resolution, integer-N operation for simpler channelization, programmable output attenuation, and an RFOUT stage that can remain muted until lock is detected. The mute-till-lock-detect function, controlled through a register bit, can suppress unwanted output during acquisition. The device also provides pin-controlled and software-controlled muting, allowing the host circuitry to manage RF visibility during startup or calibration. The ADF5355 supports analog and digital power-supply inputs from 3.15 V to 3.45 V, while its charge-pump and VCO supply range is 4.75 V to 5.25 V. An external loop filter and external reference frequency are required for the complete synthesizer implementation. These interface requirements make the device suitable for systems in which the designer needs direct digital frequency control while retaining a conventional PLL-based RF architecture. Typical applications include microwave test equipment, radar and communications signal sources, phase-noise-sensitive RF test systems, frequency converters, and local-oscillator generation for wireless infrastructure. The integrated VCO reduces board area compared with a discrete oscillator implementation, while fractional-N synthesis can provide frequency offsets that would otherwise require a fine-resolution reference or complex calibration procedure. The principal design trade-off is the need for careful RF layout, stable supplies, and an appropriately designed external loop filter. The exposed package pad requires effective thermal management, and the VCO, charge pump, reference, and output-return paths must be controlled to avoid degrading phase noise or lock performance. Output power and frequency accuracy should therefore be evaluated together rather than relying on nominal synthesizer features alone. This product data consolidates verified manufacturer information, distributor pricing, package details, application guidance, and engineering checks for the ADF5355BCPZ. It also explicitly identifies the missing package-pin, thermal, absolute-maximum, and qualified drop-in replacement data rather than presenting unverified numbers as production specifications.

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