The ADF4210/ADF4211/ADF4212/ADF4213 is a dual frequency synthesizer which can be used to implement local oscillators in the up-conversion and down-conversion sections of wireless receivers and transmitters. They can provide the LO for both the RF and IF sections. They consist of a low-noise digital PFD (Phase Frequency Detector), a precision charge pump, a programmable reference divider, programmable A and B counters and a dual-modulus prescaler (P/P+1). The A (6-bit) and B (12-bit) counters, in conjunction with the dual modulus prescaler (P/P+1), implement an N divider (N= BP+A). In addition, the 15-bit reference counter (R Counter), allows selectable REFIN frequencies at the PFD input. A complete PLL (Phase-Locked Loop) can be implemented if the synthesizers are used with an external loop filter and VCO's (Voltage Controlled Oscillators)Control of all the on-chip registers is via a simple 3-wire interface. The devices operate with a 3V (±10%) or 5V(±10%) power supply and can be powered down when not in use. * ADF4210: 550 MHz/1.2 GHz * ADF4211: 550 MHz/2.0 GHz * ADF4212: 1.0 GHz/2.7 GHz * ADF4213: 1.0 GHz/3 GHz * 2.7 V to 5.5 V Power Supply * Separate Charge Pump Supply (VP) Allows Extended * Tuning Voltage in 3 V Systems * Programmable Dual Modulus Prescaler * RF and IF: 8/9, 16/17, 32/33, 64/65 * Programmable Charge Pump Currents * 3-Wire Serial Interface * Analog and Digital Lock Detect * Fastlock Mode * Power-Down Mode