ADF4156BCPZ

Overview

The ADF4156BCPZ is a 6.2 GHz fractional-N frequency synthesizer manufactured by Analog Devices Inc., housed in a 32-lead LFCSP_VQ package. It integrates a low-noise digital phase-frequency detector, precision charge pump, and programmable reference divider to implement local oscillators for wireless transceivers. The device operates on a 2.7 V to 3.3 V supply with a typical current of 26 mA. Key electrical parameters include an RF input range up to 6.2 GHz, a reference input sensitivity of 0.4 V p-p, and a normalized phase noise floor of −220 dBc/Hz at a 100 kHz offset.

Feature Summary

• RF bandwidth extending to 6.2 GHz with cycle slip reduction circuitry for faster lock times
• Sigma-delta based fractional interpolator allowing programmable fractional-N division
• Programmable charge pump currents ranging from 312.5 µA to 5 mA via external RSET resistor
• Digital lock detect and power-down mode reducing current consumption to 1 µA

Applications

• Base stations for mobile radio including WiMAX, GSM, PCS, DCS, CDMA, and WCDMA
• Wireless handsets supporting GSM, PCS, DCS, CDMA, and WCDMA standards
• CATV equipment and Wireless LANs
• PMR and communications test equipment

Procurement Notes

Verify the specific B version suffix against the manufacturer's ordering guide to confirm the industrial temperature range of −40°C to +85°C. Ensure the LFCSP_VQ package outline dimensions match the design footprint, as thermal impedance varies significantly if the exposed paddle is soldered. Cross-reference the latest Rev. E datasheet for any updates to absolute maximum ratings or timing specifications before finalizing procurement.

Selection Notes

Select the ADF4156BCPZ when an RF output frequency up to 6.2 GHz is required with low phase noise performance. The separate VP pin allows extended tuning voltages up to 5.5 V, accommodating VCOs with wide tuning ranges. Use ADIsimPLL software for loop filter design. Ensure the reference input frequency does not exceed 250 MHz and that the PFD frequency remains below 32 MHz for reliable operation within the specified electrical limits.

Part Context

The ADF4156BCPZ belongs to the ADF4156 family of frequency synthesizers. It is pin-compatible with several other Analog Devices synthesizers, including the ADF4110, ADF4111, ADF4112, ADF4113, ADF4106, ADF4153, and ADF4154. This compatibility facilitates direct upgrades or replacements in existing designs without requiring PCB layout changes, provided the electrical specifications of the target application are met by the ADF4156.

Replacement Considerations

Public confirmed substitute part numbers: ADF4110, ADF4111, ADF4112, ADF4113, ADF4106, ADF4153, ADF4154.