ADF4156BCPZ-RL

Overview

The ADF4156BCPZ-RL is a 6.2 GHz fractional-N frequency synthesizer manufactured by Analog Devices Inc. It operates on a 2.7 V to 3.3 V power supply and features a separate VP pin for extended tuning voltage up to 5.5 V. The device integrates a low-noise digital phase frequency detector, programmable charge pump, and sigma-delta based fractional interpolator. Key specifications include an RF input range of 0.5 GHz to 6.2 GHz, a reference input frequency of 10 MHz to 250 MHz, and a maximum PFD frequency of 32 MHz. Typical operating current is 26 mA, with a low-power sleep mode drawing 1 µA.

Feature Summary

• RF bandwidth extends to 6.2 GHz with integrated fractional-N synthesis capabilities.
• Cycle slip reduction circuitry enables faster lock times without loop filter modifications.
• Programmable charge pump currents ranging from 312.5 µA to 5 mA via external RSET resistor.
• Pin-compatible with ADF4110/ADF4111/ADF4112/ADF4113, ADF4106, ADF4153, and ADF4154.

Applications

• CATV equipment
• Base stations for mobile radio (WiMAX, GSM, PCS, DCS, SuperCell 3G, CDMA, WCDMA)
• Wireless handsets (GSM, PCS, DCS, CDMA, WCDMA)
• Wireless LANs and PMR systems
• Communications test equipment

Procurement Notes

Verify the B version industrial temperature rating (-40°C to +85°C) and LFCSP package configuration against design requirements. Confirm that the VP pin supply voltage does not exceed 5.5 V and that AVDD/DVDD remain within 2.7 V to 3.3 V. Ensure proper ESD handling procedures are followed during assembly due to the high-performance RF nature of the component.

Selection Notes

Select this component for applications requiring local oscillators in upconversion and downconversion sections. Use ADIsimPLL software for loop filter design. Consider the CSR feature if fast lock times are critical. Ensure the reference input sensitivity and slew rate requirements are met for lower frequency operations.

Part Context

The ADF4156 belongs to the Analog Devices ADF41xx series of frequency synthesizers. It serves as an upgrade or alternative to earlier models like the ADF411x series, offering improved cycle slip reduction and flexible fractional modulus options. The BC suffix indicates the industrial temperature grade, while CPZ denotes the LFCSP package type.

Replacement Considerations

The datasheet explicitly lists pin compatibility with ADF4110, ADF4111, ADF4112, ADF4113, ADF4106, ADF4153, and ADF4154. Verify register map compatibility when substituting these parts, particularly regarding control bit definitions and double-buffered settings.