ADF4153

Data Sheet Fractional-N Frequency Synthesizer ADF4153 FEATURES GENERAL DESCRIPTION RF bandwidth to 4 GHz 2.7 V to 3.3 V power supply Separate VP allows extended tuning voltage Y version available: −40°C to +125°C Programmable fractional modulus Programmable charge pump currents 3-wire serial interface Analog and digital lock detect Power-down mode Pin-compatible with ADF4110/ADF4111/ADF4112/ADF4113 and ADF4106 Consistent RF output phase Loop filter design possible with ADIsimPLL Qualified for automotive applications APPLICATIONS CATV equipment Base stations for mobile radio (GSM, PCS, DCS, WiMAX, SuperCell 3G, CDMA, W-CDMA) Wireless handsets (GSM, PCS, DCS, CDMA, W-CDMA) Wireless LANs, PMR Communications test equipment The ADF4153 is a fractional-N frequency synthesizer that implements local oscillators in the upconversion and downconversion sections of wireless receivers and transmitters. It consists of a low noise digital phase frequency detector (PFD), a precision charge pump, and a programmable reference divider. There is a Σ-Δ based fractional interpolator to allow programmable fractional-N division. The INT, FRAC, and MOD registers define an overall N divider (N = (INT + (FRAC/MOD))). In addition, the 4-bit reference counter (R counter) allows selectable REFIN frequencies at the PFD input. A complete phaselocked loop (PLL) can be implemented if the synthesizer is used with an external loop filter and a voltage controlled oscillator (VCO). A simple 3-wire interface ...