ADF4113BCP - 4GHz Integer-N PLL | Analog Devices
MPN: ADF4113BCP ✓ ActiveADF4113BCP Overview
A phase-locked loop is a feedback-controlled timing system in which a programmable frequency divider and phase-frequency detector compare a divided reference signal with a divided feedback signal. The charge pump converts phase error into a tuning voltage that controls a voltage-controlled oscillator. The ADF4113 belongs to the broader frequency-synthesizer hierarchy, where PLL means phase-locked loop and integer-N describes synthesis through integer prescaler and feedback-counter division.
Key features include the 4.0 GHz RF input limit, programmable prescaler, selectable charge-pump currents, and a separate VP supply for greater tuning-voltage headroom. Its integer-N architecture simplifies programming compared with fractional-N synthesizers because the feedback division ratio is an integer. The 20-lead surface-mount package supports compact RF designs, while the exposed pad provides a thermal and electrical connection to the PCB.
The internal architecture combines a low-noise digital phase-frequency detector, precision charge pump, programmable reference divider, programmable A and B counters, and a dual-modulus P/P+1 prescaler. The A and B counters determine the feedback division ratio, while the prescaler divides the RF feedback signal before it reaches the phase-frequency detector. This arrangement supports integer-N local-oscillator generation for wireless receivers and transmitters.
Typical uses include GSM and other wireless receiver or transmitter local oscillators, radio-frequency down-conversion and up-conversion stages, RF instrumentation, and communications equipment requiring programmable frequency synthesis. The on-chip reference divider is also useful when the available reference frequency must be divided before comparison with the feedback path. The supplied family documentation specifically identifies wireless up-conversion and down-conversion local oscillators as principal applications.
Designers should preserve the exposed-pad thermal path and keep RF, reference, and charge-pump routing compact. The separate VP connection can increase tuning-voltage headroom, but it must be connected according to the manufacturer’s recommended application circuit. Input, reference, and feedback layout quality directly affects phase noise and lock behavior, so controlled-impedance routing and short high-frequency paths are important.
This product page combines verified manufacturer specifications, distributor availability and pricing references, package information, and a strict assessment of drop-in alternatives. It also distinguishes electrically compatible devices from lower-frequency family members that cannot replace the ADF4113BCP across its full operating range.
Drop-in alternatives for ADF4113BCP — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with ADF4113BCP (same form factor and footprint) — differing in Package, A Counter, B Counter, Prescaler, Power Supply.
ADF4114BCP
✅ Drop-In📋 Reference alternative (not in catalog)
ADF4113BCP Specifications
| Device Type | Single integer-N RF PLL frequency synthesizer |
| Maximum RF Input Frequency | 4.0 GHz |
| Supply Voltage Range | 2.7 V to 5.5 V |
| Nominal Maximum Supply Voltage | 5.5 V |
| System Supply Support | 3 V systems |
| Charge Pump Supply | Separate VP supply |
| Prescaler | Programmable dual-modulus P/P+1 |
| Charge Pump Current | Programmable |
| Reference Divider | Programmable |
| A Counter | 6-bit programmable |
| B Counter | 13-bit programmable |
| Phase Detector | Low-noise digital phase-frequency detector |
| Package | 20-lead LFCSP with exposed pad |
| Pin Count | 20 pins |
| Mounting Type | Surface mount |
| Shipping Package | Tray |
ADF4113BCP tray Pin Configuration Guide
Pin configuration for ADF4113BCP (tray package). Pin numbering, functions, and connection diagrams are defined in the manufacturer datasheet. Refer to it for the exact footprint and soldering guidelines.
No detailed pinout data available for ADF4113BCP.
Refer to the datasheet for full pin configuration.
Typical Applications
ADF4113BCP is suitable for 6 applications: GSM Wireless Receiver Local Oscillator, Wireless Transmitter Up-Conversion, RF Down-Conversion Mixer, Programmable RF Signal Source, RF Communication Module, Instrumentation and Test Equipment.
GSM Wireless Receiver Local Oscillator
The ADF4113BCP fits a GSM receiver local-oscillator block because the Analog Devices family documentation identifies wireless down-conversion and up-conversion synthesizers as principal uses. Its integer-N architecture combines a programmable reference divider, 6-bit A counter, 13-bit B counter, and dual-modulus P/P+1 prescaler for configuring the feedback ratio. The 4.0 GHz maximum RF input provides useful tuning headroom for receiver mixers. Because the 13 MHz TCXO example requires on-chip reference division, the programmable reference divider helps simplify the reference plan. Final lock time and phase noise depend on the reference source, loop filter, VCO, and PCB isolation, so the timing and RF budgets should be verified with the complete synthesizer loop.
Recommended
Wireless Transmitter Up-Conversion
The ADF4113BCP can generate the programmable local-oscillator signal used by a wireless transmitter up-conversion chain. Its 4.0 GHz RF input limit supports RF feedback paths within the documented family range, while the separate VP charge-pump supply provides additional tuning-voltage headroom when the external VCO requires it. Programmable prescaler and charge-pump settings allow the loop bandwidth and phase-noise trade-off to be matched to the transmitter requirement. The key engineering consideration is keeping the feedback divider and VCO connection compact, because excess trace length or poor grounding can degrade phase noise and make the PLL harder to lock.
Recommended
RF Down-Conversion Mixer
The ADF4113BCP is appropriate for programmable RF local-oscillator generation ahead of a down-conversion mixer. The device accepts feedback signals up to 4.0 GHz and uses a phase-frequency detector, precision charge pump, reference divider, and dual-modulus prescaler to create a locked, digitally programmed output. The 2.7 V minimum operating voltage supports 3 V system designs without requiring a 5 V-only architecture. Board implementation remains critical: the RF feedback line should be short and impedance controlled, while the reference and charge-pump returns should not share noisy high-current paths. Loop-filter values and lock-time limits must be taken from the current manufacturer documentation and validated with the selected VCO.
Recommended
Programmable RF Signal Source
The ADF4113BCP can serve as the synthesizer element in a programmable RF signal source when integer channel spacing is sufficient. Its programmable A counter, B counter, reference divider, dual-modulus prescaler, and charge-pump current permit the feedback and loop behavior to be configured for different output frequencies. The 4.0 GHz RF ceiling defines the upper limit of the feedback path, while the separate VP supply can extend the tuning range of an external voltage-controlled oscillator. For laboratory or production test equipment, predictable reference routing and isolation are essential because reference phase noise and spur performance propagate through the entire synthesis loop. The exact lock-time and phase-noise figures require the manufacturer’s current electrical data.
Recommended
RF Communication Module
The ADF4113BCP suits compact RF communication modules that require a programmable local oscillator without the resolution of a fractional-N architecture. Its 20-lead LFCSP footprint supports surface-mount assembly, and its 2.7 V to 5.5 V operating range accommodates both 3 V and higher-voltage system rails. The separate VP supply is valuable when the surrounding VCO can benefit from additional tuning headroom. Designers should provide the exposed pad with adequate ground and thermal copper, isolate the reference input from digital and switching supplies, and use a loop filter appropriate to the required channel spacing and settling behavior. Firmware should program all divider and charge-pump fields consistently with the selected reference and prescaler.
Recommended
Instrumentation and Test Equipment
The ADF4113BCP can provide the programmable RF tuning function required by communication and RF test equipment. Integer-N synthesis is straightforward to configure because the feedback ratio is formed from integer counter values, and the programmable charge-pump current permits loop optimization during design bring-up. The device’s 4.0 GHz input limit makes it relevant for instruments operating within that range. Signal purity depends on more than the IC itself: low-noise reference selection, isolated supply rails, a carefully designed loop filter, and controlled RF impedance determine usable phase-noise and spur performance. For production use, the absence of separately verified lock-time and phase-noise figures in the supplied excerpts means engineers should consult the official data sheet and characterize the complete VCO-plus-PLL loop.
Recommended
Recommended Products Summary
Engineering reference data for ADF4113BCP — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ADF4114BCP |
|---|---|---|
| Brand | Analog Devices | Analog Devices |
| Package | 20-LFCSP with exposed pad | 20-LFCSP with exposed pad - same |
| Maximum RF Input Frequency | 4.0 GHz | 8 GHz |
| Synthesis Architecture | Integer-N | Integer-N |
| Prescaler | Programmable dual-modulus P/P+1 | Programmable dual-modulus P/P+1 |
| Charge Pump Current | Programmable | Programmable |
| Separate VP Supply | Yes | Yes |
| Phase Detector | Low-noise digital phase-frequency detector | Low-noise digital phase-frequency detector |
Key Differentiators
- Directly covers the 4 GHz RF operating class (vs ADF4112BCP)
- Available higher-frequency same-package upgrade (vs ADF4114BCP)
- Integer-N architecture simplifies loop programming (vs ADF4156BCPZ)
Design Notes
Keep the RF feedback route from the VCO to the prescaler short and use a controlled-impedance layout. Place the loop-filter components near the charge-pump and VCO-control connections, and avoid routing sensitive reference and feedback paths beneath digital return currents. The separate VP supply should be decoupled according to the manufacturer’s recommended application circuit; do not combine its return with a noisy switching-node ground.
Connect the exposed pad to a continuous PCB ground plane with adequate thermal copper and vias according to the manufacturer layout guidance. Although the supplied excerpts do not provide thetaJA, maximum junction temperature, or supply-current figures, the exposed pad is part of the thermal path and must not be left floating. Review the current data sheet for dissipation and temperature limits before setting maximum RF output and output-buffer operating conditions.
Treat the main supply and VP as distinct rails because the ADF4113BCP supports a separate charge-pump supply for extended tuning voltage. Bypass each supply locally and follow the recommended capacitor values and placement. Confirm that VP cannot exceed the device’s absolute maximum rating during startup or VCO control-range conditions. A programmable charge-pump setting supports loop optimization, but excessive current can increase spurs or disturb loop stability if it is not matched to the VCO and filter.
Do not treat a lower-frequency ADF411x relative as a true drop-in replacement for a design using the ADF4113BCP’s full 4.0 GHz range. The verified 550 MHz ADF4110, 1.2 GHz ADF4111, and 3.0 GHz ADF4112 limits can fall well below the required operating frequency. Likewise, ADF4156BCPZ and ADF4157BCPZ offer different synthesis capabilities and are not established as drop-ins. Always compare the complete pin table, register interface, exposed-pad connection, and electrical limits against the manufacturer data sheet.
Compliance Information
The supplied excerpts do not provide definitive component-level RoHS, REACH, lead-free, halogen-free, or conflict-minerals statements. AEC-Q100 is not applicable to this general-purpose RF PLL.
