ADF4252BCP-REEL

The ADF4252BCP-REEL is a Fractional-N Synthesizer from Analog Devices, designed to create state-of-the-art local oscillators for RF signal upconversion and downconversion in wireless applications. When combined with a VCO and loop filter, it forms a complete phase-locked loop (PLL).

This device utilizes sigma-delta based fractional-N technology for superior phase noise and spurious performance. It supports a frequency range of 0.1 to 3.0 GHz for Fractional-N operation and 0.05 to 1.2 GHz for Integer-N operation. Key electrical features include a 250 MHz reference frequency input, PFD frequencies up to 30 MHz, and 8 programmable charge pump currents. It communicates via a 3-wire serial interface with 1.8V logic compatibility.

The ADF4252BCP-REEL is housed in a compact 4x4mm Chipscale package (LFCSP). It operates with a power supply range of 2.7V to 3.3V, with a separate VP up to 5V. The part exhibits -103dBc/Hz in-band phase noise performance under GSM 1800MHz conditions, offering significant improvement over Integer-N PLLs.

This synthesizer is targeted at handset and infrastructure applications requiring low phase noise, fast settling times, and small channel steps at high output frequencies. Evaluation boards and software are available.