The Analog Devices ADF4252BCPZ is a dual-mode PLL frequency synthesizer that supports both Fractional-N and Integer-N operation, covering RF and IF synthesis up to 3 GHz. It accepts CMOS or TTL reference inputs and delivers a single clock output. The part is designed for base station local oscillators, wireless infrastructure, satellite receivers, and test equipment where the frequency plan demands sub-Hz resolution (Fractional-N) or the lowest phase noise (Integer-N). The 3:2 input-to-output ratio gives flexibility in reference routing. Operating from 2.7 V to 3.3 V, it runs from a single rail typical of modern RF logic, and the -40°C to 85°C range covers outdoor telecom cabinets and industrial environments.
Industrial temperature grade — the environment it is rated for
It suits base stations, microwave backhaul radios, and outdoor RF equipment that sees seasonal extremes. There is no AEC-Q100 qualification on this part, so it is not graded for automotive under-hood or chassis domains. For an unheated cell-tower enclosure or a rooftop satellite terminal, the range is adequate.
24-LFCSP footprint — what the package means for the layout
The ADF4252BCPZ comes in a 24-lead LFCSP (4x4 mm) with an exposed thermal pad. The pad is essential — without it the junction temperature rises quickly at continuous operation near 3 GHz. The package ships in trays (not tape-and-reel), so plan for pick-and-place nozzle selection and tray feeders.
ADI lists the ADF4252BCPZ as an active product with ROHS3 compliance.