GENERAL DESCRIPTION
The ADF4106 frequency synthesizer can be 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 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 (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 synthe sizer is used with an external loop filter and VCO (Voltage Controlled Oscillator). Its very high bandwidth means that frequency doublers can be eliminated in many high-frequency systems, simplifying system architecture and lowering cost.

FEATURES
  6.0 GHz Bandwidth
  2.7 V to 3.3 V Power Supply
  Separate Charge Pump Supply (VP) Allows Extended Tuning Voltage in 3 V Systems
  Programmable Dual Modulus Prescaler 8/9, 16/17, 32/33, 64/65
  Programmable Charge Pump Currents
  Programmable Anti-Backlash Pulsewidth
  3-Wire Serial Interface
  Analog and Digital Lock Detect
  Hardware and Software Power-Down Mode

APPLICATIONS
  Broadband Wireless Access
  Instrumentation
  Wireless LANS
  Base Stations For Wireless Radio