GENERAL DESCRIPTION

The ADF4107 frequency synthesizer can be used to implement local oscillators in the upconversion and downconversion 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.

FEATURES

  7.0 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 antibacklash pulse width

  3-wire serial interface

  Analog and digital lock detect

  Hardware and software power-down mode

APPLICATIONS

  Broadband wireless access

  Satellite systems

  Instrumentation

  Wireless LANs

  Base stations for wireless radio