The ADF4118BRUZ is a Frequency Synthesizer which can be used to implement local oscillators in the up 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 device operates with a 2.7V (±10%) or 5V (±10%) power supply and can be powered when not in use.

• Separate Vp allows extended tuning voltage in 3V systems
• 3-wire serial interface
• Digital lock detect
• Power down mode
• Fastlock mode

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