ADF4252

Data Sheet Dual Fractional-N/Integer-N Frequency Synthesizer ADF4252 FEATURES GENERAL DESCRIPTION 3.0 GHz fractional-N/1.2 GHz integer-N 2.7 V to 3.3 V power supply Separate VP allows extended tuning voltage to 5 V Programmable dual modulus prescaler RF: 4/5, 8/9 IF: 8/9, 16/17, 32/33, 64/65 Programmable charge pump currents 3-wire serial interface Digital lock detect Power-down mode Programmable modulus on fractional-N synthesizer Trade off noise vs. spurious performance 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 The ADF4252 is a dual fractional-N/integer-N frequency synthesizer that can be used to implement local oscillators (LO) in the upconversion and downconversion sections of wireless receivers and transmitters. Both the RF and IF synthesizers consist of a low noise digital phase frequency detector (PFD), a precision charge pump, and a progr...