ADF4216BRUZ

Overview

The ADF4216BRUZ is a dual RF PLL frequency synthesizer from Analog Devices, designed for local oscillator implementation in wireless transceivers. It integrates two independent phase-locked loops with selectable dual-modulus prescalers (RF: 32/33 or 64/65; IF: 8/9 or 16/17). The device operates on a 2.7 V to 5.5 V supply and features a 3-wire serial interface. Key electrical parameters include an RF input range of 0.2 GHz to 1.2 GHz, an IF input range of 45 MHz to 550 MHz, and a reference input frequency of 5 MHz to 40 MHz. It offers selectable charge pump currents of 1.125 mA and 4.5 mA, with a typical operating current of 9.0 mA at 3 V.

Feature Summary

• Dual synthesizers with independent RF and IF sections for upconversion and downconversion LO generation
• Selectable dual-modulus prescalers: RF supports 32/33 or 64/65; IF supports 8/9 or 16/17
• Programmable 14-bit R counter and N divider (N = BP + A) for flexible frequency synthesis
• Low-noise digital PFD and precision charge pump with selectable high (4.5 mA) and low (1.125 mA) currents

Applications

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

Procurement Notes

Verify the obsolete status of the ADF4216BRUZ before procurement planning. Confirm that the TSSOP-20 package dimensions match the target PCB footprint. Ensure ESD handling protocols are strictly followed during assembly due to the device's sensitivity. Cross-reference the specific B-version temperature range (-40°C to +85°C) with environmental requirements.

Selection Notes

Select the ADF4216BRUZ when an RF input frequency up to 1.2 GHz is required. Compare against ADF4217BRUZ (up to 2.0 GHz) or ADF4218BRUZ (up to 2.5 GHz) if higher frequencies are needed. Verify that the desired IF frequency falls within the 45 MHz to 550 MHz range. Check if the selectable prescaler ratios (32/33 vs 64/65) meet the loop bandwidth and division ratio constraints of the design.

Part Context

The ADF4216BRUZ belongs to the ADF4216/ADF4217/ADF4218 family of dual frequency synthesizers. These devices share a common architecture and pinout but differ primarily in their maximum RF input frequency capabilities. The BRUZ suffix indicates the B-grade temperature variant packaged in a Thin Shrink Small Outline Package (TSSOP-20). This family was designed to provide integrated solutions for dual-loop applications in cellular infrastructure and mobile devices.

Replacement Considerations

Publicly confirmed direct substitute part numbers are not available in the provided documentation. As the component is marked obsolete, engineers should evaluate the ADF4217BRUZ or ADF4218BRUZ for higher frequency needs, or consult Analog Devices for modern replacements compatible with the TSSOP-20 form factor.