ADF4112BRUZ

Overview

The ADF4112BRUZ is a single-channel, integer-N phase-locked loop (PLL) frequency synthesizer from Analog Devices, designed for RF applications up to 3.0 GHz. It integrates a low-noise digital phase-frequency detector, precision charge pump, programmable reference divider, and dual-modulus prescaler. The device operates on a 2.7 V to 5.5 V supply with a typical current consumption of 6.5 mA. Key features include a separate charge pump supply pin for extended tuning voltage, programmable charge pump currents, and a 3-wire serial interface. It supports multiple prescaler configurations (8/9, 16/17, 32/33, 64/65) and includes hardware/software power-down modes.

Feature Summary

• Maximum RF input frequency of 3.0 GHz with integrated dual-modulus prescaler
• Separate charge pump supply (VP) allows extended tuning voltage in 3 V systems
• Programmable charge pump currents and antibacklash pulse width
• Digital and analog lock detect with 3-wire serial interface

Applications

• Base stations for wireless radio (GSM, PCS, DCS, CDMA, WCDMA)
• Wireless handsets and local oscillators for transceivers
• Communications test equipment
• CATV equipment

Procurement Notes

Verify the specific suffix 'BRUZ' indicates the industrial temperature range (-40°C to +85°C) and TSSOP-16 package as per the manufacturer's ordering guide. Confirm that the component requires an external loop filter and voltage-controlled oscillator (VCO) to function as a complete PLL system. Check for any lead-free or RoHS compliance documentation if required by the target assembly process.

Selection Notes

Select the ADF4112BRUZ when the application requires a PLL synthesizer with an RF input frequency up to 3.0 GHz. Ensure the design accommodates the separate VP pin for charge pump power if operation in 3 V systems with high tuning voltages is needed. Compare against the ADF4111 (1.2 GHz) or ADF4113 (4.0 GHz) if the frequency requirement falls outside this specific range.

Part Context

The ADF4112BRUZ belongs to the ADF4110 family of RF PLL frequency synthesizers, which also includes the ADF4110, ADF4111, and ADF4113. These devices share a common architecture and register map but differ primarily in their maximum operating frequencies. The ADF4112 specifically targets the 3.0 GHz segment, bridging the gap between the lower-frequency ADF4111 and the higher-frequency ADF4113.

Replacement Considerations

The ADF4113BRUZ offers a higher maximum frequency of 4.0 GHz and may serve as a functional replacement if the system budget allows for the increased cost and slightly higher current consumption (8.5 mA vs. 6.5 mA). Verify pin compatibility and register settings remain unchanged during substitution.