ADF4252BCPZ-RL

Overview

The ADF4252BCPZ-RL is a dual fractional-N/integer-N frequency synthesizer manufactured by Analog Devices Inc. It integrates two independent synthesizers: an RF section supporting up to 3.0 GHz with fractional-N capabilities, and an IF section operating up to 1.2 GHz with integer-N functionality. The device operates on a 2.7 V to 3.3 V supply and features programmable charge pump currents, separate tuning voltage inputs (VP1, VP2) extending to 5 V, and a 3-wire serial interface. Packaged in a 24-lead LFCSP, it includes digital lock detect and power-down modes for optimized performance in wireless communication systems.

Feature Summary

• Dual synthesizer architecture with RF fractional-N support up to 3.0 GHz and IF integer-N support up to 1.2 GHz
• Programmable dual modulus prescalers for RF (4/5, 8/9) and IF (8/9, 16/17, 32/33, 64/65)
• Separate VP1 and VP2 pins allow extended tuning voltage up to 5.5 V
• Integrated digital phase frequency detector and precision charge pump with programmable current settings

Applications

• Base stations for mobile 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 RL against the manufacturer's ordering guide to confirm reel packaging specifications. Ensure that the exposed pad connection requirements are met during assembly to maintain thermal and electrical integrity. Confirm that the RSET resistor value aligns with the desired minimum charge pump current as defined in the datasheet specifications.

Selection Notes

Select this component when a single IC solution is required for both upconversion and downconversion local oscillators. The RF section is suitable for high-frequency applications requiring fractional channel spacing, while the IF section provides cost-effective integer-N synthesis. Verify that the external VCO input sensitivity matches the device's output drive capabilities and that the loop filter design accommodates the programmable charge pump range.

Part Context

The ADF4252 belongs to the Analog Devices ADF4252 series of dual frequency synthesizers. It is designed to replace discrete PLL solutions by integrating both RF and IF loops into a single silicon chip. The BCPZ designation indicates the lead-free, RoHS-compliant variant housed in a Lead Frame Chip Scale Package (LFCSP).

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.