ADF4118BRUZ

Overview

The ADF4118BRUZ is an Integer-N RF PLL frequency synthesizer from Analog Devices, designed for local oscillator implementation in wireless communication systems. It supports a maximum RF input frequency of 3.0 GHz with a dual-modulus prescaler configuration of 32/33. The device operates on a single power supply ranging from 2.7 V to 5.5 V, consuming a typical current of 6.5 mA at 5 V. Key internal components include a low-noise digital phase-frequency detector, a precision charge pump with selectable gain, and programmable counters (R, A, and B). It features a 3-wire serial interface for register control and includes Fastlock mode for rapid settling times.

Feature Summary

• Supports RF input frequencies up to 3.0 GHz using a 32/33 dual-modulus prescaler.
• Integrates a low-noise digital phase-frequency detector and precision charge pump.
• Features Fastlock mode for accelerated loop locking and power-down capability.
• Operates within a 2.7 V to 5.5 V supply range with a typical current consumption of 6.5 mA.

Applications

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

Procurement Notes

Verify the specific suffix against the manufacturer's ordering guide to confirm temperature grade and packaging format. The BRUZ designation indicates a B-grade industrial temperature variant (-40°C to +85°C) housed in a TSSOP-16 package. Confirm availability status through authorized distributors as supply levels may fluctuate. Ensure the selected variant matches the required operating temperature range for the target application environment.

Selection Notes

Select the ADF4118BRUZ when the application requires a frequency synthesizer capable of handling RF inputs up to 3.0 GHz. This model is suitable for designs needing a 32/33 prescaler ratio to achieve high division ratios. Compare performance metrics such as phase noise and reference spurs against system requirements. Consider the Y-grade version if operation beyond +85°C is necessary. Verify that the external VCO and loop filter components are compatible with the device's charge pump characteristics and tuning voltage range.

Part Context

The ADF4118BRUZ belongs to the ADF411x family of frequency synthesizers, which also includes the ADF4116 and ADF4117 models. These devices share a common architecture and pinout but differ primarily in their maximum supported RF input frequencies. The ADF4116 supports up to 550 MHz, the ADF4117 up to 1.2 GHz, and the ADF4118 up to 3.0 GHz. All variants utilize the same 16-pin TSSOP package and 3-wire serial interface.

Replacement Considerations

The ADF4117BRUZ serves as a lower-frequency alternative within the same family. For applications requiring extended temperature ranges, the ADF4118YRUZ variant offers operation up to +125°C. Direct pin-compatible substitutes outside the ADF411x family require careful evaluation of RF input sensitivity, charge pump current, and phase noise specifications.