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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.
ADF4106 Maximum Ratings
AVDD to GND3. . . . . . . . . . . . . . . . . . . . . . 0.3 V to +3.6 V AVDD to DVDD . . . . . . . . . . . . . . . . . . . . . .0.3 V to +0.3 V VP to GND . . . . . . . . . . . . . . . . . . . . . . . . .0.3 V to +5.3 V VP to AVDD . . . . . . . . . . . . . . . . . . . . . . . .0.3 V to +5.5 V Digital I/O Voltage to GND . . . . . . . . 0.3 V to VDD + 0.3 V Analog I/O Voltage to GND . . . . . . . . 0.3 V to VP + 0.3 V REFIN, RFINA, RFINB to GND . . . . . . 0.3 V to VDD + 0.3 V Operating Temperature Range Industrial (B Version) . . . . . . . . . . . . . . . 40°C to +85°C Storage Temperature Range . . . . . . . . . 65°C to +150°C Maximum Junction Temperature . . . . . . . . . . . . . . . .150°C Lead Temperature, Soldering Vapor Phase (60 sec) . . . . . . . . . . . . . . . . . . . . . . . .215°C Infrared (15 sec) . . . . . . . . . . . . . . . . . . . . . . . . . . . .220°C
ADF4106 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
ADF4106 Typical Application
Broadband Wireless Access Instrumentation Wireless LANS Base Stations For Wireless Radio