ADF4111BRUZ-RL

Overview

The ADF4111BRUZ-RL is an RF PLL frequency synthesizer from Analog Devices, designed for local oscillator implementation in wireless transceivers. It operates with a maximum input frequency of 1.2 GHz and supports a supply voltage range of 2.7 V to 5.5 V. The device features a low-noise digital phase frequency detector, a precision charge pump, and programmable counters. It utilizes a 3-wire serial interface for register control and includes hardware and software power-down modes. The component is housed in a TSSOP-16 package and functions within an industrial temperature range of -40°C to +85°C.

Feature Summary

• Maximum RF input frequency of 1.2 GHz
• Programmable dual-modulus prescaler (8/9, 16/17, 32/33, 64/65)
• Separate VP pin allows extended tuning voltage up to 6.0 V
• Integrated analog and digital lock detect outputs

Applications

• Base stations for wireless radio (GSM, PCS, DCS, CDMA, WCDMA)
• Wireless handsets (GSM, PCS, DCS, CDMA, WCDMA)
• Communications test equipment

Procurement Notes

Verify the specific suffix RL against the manufacturer's ordering guide to confirm reel packaging specifications. Ensure the B version designation matches the required -40°C to +85°C operating temperature range. Confirm that the TSSOP-16 package dimensions align with the target PCB footprint requirements before finalizing procurement.

Selection Notes

Select this model when an RF input frequency up to 1.2 GHz is required. The separate VP supply pin is critical if the system requires a tuning voltage exceeding the AVDD level, such as driving VCOs with wide tuning ranges in 3 V systems. Verify that the programmable charge pump currents meet the loop filter design requirements for the desired phase noise performance.

Part Context

This component belongs to the ADF4110 family of integer-N frequency synthesizers. It shares pin compatibility and functional similarities with the ADF4110, ADF4112, and ADF4113 models. The primary distinction lies in the maximum supported RF input frequency, which is 1.2 GHz for the ADF4111 compared to 550 MHz for the ADF4110 and 3.0 GHz for the ADF4112.

Replacement Considerations

Pin-compatible alternatives include the ADF4110, ADF4112, and ADF4113. Selection depends on whether the application requires a lower or higher maximum RF input frequency than 1.2 GHz.