Phase Detector / PLL Frequency Synthesizer

The ADF4002 frequency synthesizer is used to implement local oscillators in the up-conversion and down-conversion sections of wireless receivers and transmitters. It consists of a low-noise digital phase frequency detector (PFD), a precision charge pump, a programmable reference divider and programmable N divider. The 14-bit reference counter (R counter), allows selectable REFIN frequencies at the PFD input.

A complete phase-locked loop (PLL) can be implemented if the synthesizer is used with an external loop filter and voltage controlled oscillator (VCO). In addition, by programming R and N to 1, the device can be used as a standalone PFD and charge pump.

The ADF4002-EP supports defense and aerospace applications (AQEC standard).

* 400 MHz bandwidth

* 2.7 to 3.3 V power supply

* Separate charge pump supply (VP) allows extended tuning voltage in 3 V systems

* Programmable charge pump currents

* 3-wire serial interface

* Analog and digital lock detect

* Hardware and software power-down mode

* 104 MHz phase detector