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Product Descriptions

The ADF4110 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 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 synthesizer is used with an external loop filter and VCO (Voltage Controlled Oscillator).

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.

Product 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 Vp Allows Extended Tuning Voltage in 3V Systems

? Programmable Charge Pump Currents

? Programmable Dual Modulus Prescaler 8/9, 16/17, 32/33, 64/65

? Programmable Anti-Backlash Pulse Width

? 3-Wire Serial Interface

? Digital Lock Detect

? Power Down Mode

Product 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

Specifications

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