ADF4156BRUZ-RL

Overview

The ADF4156BRUZ-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 Σ-Δ based fractional interpolator. Key specifications include an RF input range of 0.5/6.2 GHz, a reference input frequency of 10/250 MHz, and a typical operating current of 26 mA. It supports cycle slip reduction for faster lock times and offers programmable RF output phase control via a 3-wire serial interface.

Feature Summary

• RF bandwidth extending to 6.2 GHz with integrated Σ-Δ fractional interpolator
• Separate VP pin allows extended tuning voltage up to 5.5 V
• Cycle slip reduction circuitry for faster lock times without loop filter modification
• Programmable RF output phase and charge-pump currents

Applications

• CATV equipment local oscillators
• Mobile radio base stations (WiMAX, GSM, PCS, DCS, CDMA, WCDMA)
• Wireless handsets and LANs
• Communications test equipment

Procurement Notes

Verify the B version industrial temperature rating (-40°C to +85°C) and TSSOP-16 package configuration. Confirm that the RL suffix indicates reel packaging as per standard distributor listings. Ensure the external VCO and loop filter components are selected to match the 2.7 V to 3.3 V supply and VP pin requirements.

Selection Notes

Select this component when a 6.2 GHz fractional-N synthesizer is required for upconversion or downconversion stages. It is suitable for applications needing fast lock times via CSR and specific phase relationships between output and reference. Ensure the design accommodates the separate VP supply for high tuning voltages if necessary.

Part Context

The ADF4156 is part of the ADF41xx series of PLL frequency synthesizers. It is pin-compatible with the ADF4110, ADF4111, ADF4112, ADF4113, ADF4106, ADF4153, and ADF4154. This compatibility allows for potential drop-in replacements in existing designs utilizing those older models, provided the higher RF bandwidth and fractional-N capabilities are utilized.

Replacement Considerations

Pin-compatible substitutes include ADF4110, ADF4111, ADF4112, ADF4113, ADF4106, ADF4153, and ADF4154. Verify functional differences such as integer-only vs. fractional-N operation and maximum RF frequency before substitution.