ADF4156BRUZ-RL7

Overview

The ADF4156BRUZ-RL7 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, a precision charge pump with programmable currents, and a Σ-Δ based fractional interpolator. It utilizes a 3-wire serial interface for register control and includes cycle slip reduction circuitry for faster lock times. The component is housed in a 16-TSSOP package.

Feature Summary

• RF bandwidth extending to 6.2 GHz
• Programmable fractional modulus and charge-pump currents
• Cycle slip reduction (CSR) for accelerated lock times
• Digital lock detect and power-down mode

Applications

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

Procurement Notes

Verify the specific suffix RL7 corresponds to the reel packaging configuration when sourcing. Confirm that the B version operating temperature range of -40°C to +85°C meets the environmental requirements of the target application. Ensure the external loop filter design accounts for the programmable charge-pump current settings defined by the RSET resistor.

Selection Notes

Select this component for applications requiring local oscillators in upconversion and downconversion sections. The separate VP pin allows driving VCOs with higher tuning voltages than the logic supply. Use ADIsimPLL software for loop filter design. Ensure the reference input frequency does not exceed 250 MHz and the RF input sensitivity requirements are met with appropriate coupling capacitors.

Part Context

The ADF4156 is part of the ADF41xx family of frequency synthesizers. It is pin-compatible with 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 align with the ADF4156's capabilities.

Replacement Considerations

Pin-compatible substitutes include ADF4110, ADF4111, ADF4112, ADF4113, ADF4106, ADF4153, and ADF4154. Verify that the replacement part supports the required RF frequency range and charge-pump current specifications before integration.