ADF4252BCPZ-R7

ADF4252 is a dual fractional-N/integer-N frequency synthesizer that can be used to implement local oscillators(LO) in the up-conversion and down-conversion 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 programmable reference divider. The RF synthesizer has a Σ-Δ-based fractional interpolator that allows programmable fractional-N division. The IF synthesizer has programmable integer-N counters. A complete phase-locked loop(PLL) can be implemented if the synthesizer is used with an external loop filter and voltage controlled oscillator(VCO). Typical application includes base stations for mobile radio(GSM, PCS, DCS, CDMA, WCDMA), wireless handsets (GSM, PCS, DCS, CDMA, WCDMA), wireless LANs, communications test equipment and CATV equipment.

• 3GHz fractional-N/1.2 GHz integer-N
• 2.7V to 3.3V power supply
• Separate Vp allows extended tuning voltage to 5V
• Programmable dual modulus prescaler RF: 4/5, 8/9 and IF: 8/9, 16/17, 32/33, 64/65
• Programmable charge pump currents
• 3-wire serial interface, digital lock detect and power-down mode
• Programmable modulus on fractional-N synthesizer
• Trade off noise vs. spurious performance
• 24 lead LFCSP-EP package
• Operating temperature range from -40°C to 85°C

Notes

ADI products are only authorized (and sold) for use by the customer and are not to be resold or otherwise passed on to any third party