GENERAL DESCRIPTION
The ADF41020 frequency synthesizer can be used to implement local oscillators as high as 18 GHz 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 high frequency programmable feedback dividers (A, B, and P). A complete phase-locked loop (PLL) can be implemented if the synthesizer is used with an external loop filter and voltage controlled oscillator (VCO).

FEATURES
   18 GHz maximum RF input frequency
   Integrated SiGe prescaler
   Software compatible with the ADF4106/ADF4107/ADF4108
      family of PLLs
   2.85 V to 3.15 V PLL power supply
   Programmable dual-modulus prescaler
      8/9, 16/17, 32/33, 64/65
   Programmable charge pump currents
   3-wire serial interface
   Analog and digital lock detect
   Hardware and software power-down mode

APPLICATIONS
   Microwave point-to-point/multipoint radios
   Wireless infrastructure
   VSAT radios
   Test equipment
   Instrumentation