GENERAL DESCRIPTION

The ADF4116 family of frequency synthesizers can be used to implement local oscillators in the up-conversion 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).

FEATURES

ADF4116: 550 MHz

ADF4117: 1.2 GHz

ADF4118: 3.0 GHz

2.7 V to 5.5 V Power Supply

Separate VP Allows Extended Tuning Voltage in 3 V Systems

Selected Charge Pump Currents

Dual Modulus Prescaler

ADF4116: 8/9

ADF4117/ADF4118: 32/33

3-Wire Serial Interface

Digital Lock Detect

Power-Down Mode

Fast Lock Mode

APPLICATIONS

Base Stations for Wireless Radio (GSM, PCS, DCS, CDMA, WCDMA)

Wireless Handsets (GSM, PCS, DCS, CDMA, WCDMA)

Wireless LANS

Communications Test Equipment

CATV Equipment