Analog Devices Inc. ADF4113BRU

Description
The ADF4110 family of frequency synthesizers is designed for use in wireless receivers and transmitters. They consist of a low noise digital PFD, a precision charge pump, a programmable reference divider, programmable A and B counters, and a dual-modulus prescaler. 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). Additionally, 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). Control of all the on-chip registers is via a simple 3-wire interface. The devices operate with a power supply ranging from 2.7 V to 5.5 V and can be powered down when not in use.

Features
ADF4110: 550 MHz
ADF4111: 1.2 GHz
ADF4112: 3.0 GHz
ADF4113: 4.0 GHz
2.7 V to 5.5 V power supply
Separate charge pump supply (V ) 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
Base stations for wireless radio (GSM, PCS, DCS, CDMA, WCDMA)
Wireless handsets (GSM, PCS, DCS, CDMA, WCDMA)
Wireless LANS
Communications test equipment
CATV equipment