The ADF4116/ADF4117/ADF4118 are frequency synthesizers which can be used to implement local oscillators in the up-conversion and down-conversion sections of wireless receivers and transmitters. 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 (5-bit) and B (13-bit) counters, in conjunction with the dual modulus prescaler (P/P+1), implement an N divider (N= BP+A). In addition, the 14-bit reference counter (R Counter), allows selectable REFIN frequencies at the PFD input. A complete PLL (Phase-Locked Loop) can be implemented if the synthesizer is used with an external loop filter and VCO (Voltage Controlled Oscillator). Control of all the on-chip registers is via a simple 3-wire interface. The devices operate with a 2.7V (± 10%) or 5V (± 10%) power supply and can be powered when not in use. * ADF4116: 550 MHz * ADF4117: 1.2 GHz * ADF4118: 3.0 GHz * +2.7 V to +5.5 V Power Supply * Dual Modulus Prescaler ADF4116: 8/9 ADF4117/ADF4118: 32/33 * Separate VP Allows Extended Tuning Voltage in 3V Systems * 3-Wire Serial Interface * Digital Lock Detect * Power Down Mode * Fastlock Mode