ADF4153BRU

Overview

The ADF4153BRU is a fractional-N frequency synthesizer designed for local oscillator implementation in wireless transceivers. It integrates a low-noise digital phase frequency detector, precision charge pump, and programmable reference divider with a Σ-Δ interpolator. The device supports RF bandwidths up to 4 GHz and operates on a 2.7 V to 3.3 V supply. Key features include programmable charge pump currents, analog and digital lock detection, and a 3-wire serial interface. It is available in TSSOP-16 and LFCSP packages.

Feature Summary

• Fractional-N synthesis with RF bandwidth up to 4 GHz
• Programmable charge pump currents via RSET resistor
• Analog and digital lock detect outputs accessible via MUXOUT
• Pin-compatible with ADF4110/ADF4111/ADF4112/ADF4113

Applications

• Base stations for mobile radio (GSM, PCS, DCS, CDMA, W-CDMA)
• Wireless LANs and PMR communications
• CATV equipment
• Communications test equipment

Procurement Notes

Verify the specific package variant required, as the ADF4153 family includes both TSSOP-16 (RU) and LFCSP (CP) options. Confirm temperature grade requirements; the 'B' suffix denotes industrial range (-40°C to +85°C), while 'Y' denotes extended range (-40°C to +125°C). Ensure compatibility with existing board footprints if replacing pin-compatible predecessors like the ADF4110 series.

Selection Notes

Select the ADF4153BRU for designs requiring a 3 V supply and RF frequencies up to 4 GHz. Use the ADIsimPLL tool for loop filter design to optimize phase noise and spur performance. Consider the separate VP pin capability if the target VCO requires tuning voltages exceeding the 3.3 V logic supply. Verify that the external VCO input sensitivity meets the minimum -8 dBm requirement for the B version.

Part Context

The ADF4153 belongs to Analog Devices' high-performance PLL frequency synthesizer portfolio. It serves as an upgrade or alternative to earlier models like the ADF4110/ADF4111 series, offering improved noise characteristics and fractional-N capabilities. The component is widely used in cellular infrastructure and portable wireless devices where stable local oscillation is critical.

Replacement Considerations

Direct pin-compatible replacements include ADF4110, ADF4111, ADF4112, ADF4113, and ADF4106. When substituting, verify that the predecessor's charge pump current limits and reference input sensitivities are compatible with the existing loop filter and VCO specifications.