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ADF4252,pdf datasheet (Frequen

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The ADF4252 is a dual fracTIonal-N/integer-N frequencysynthesizer that can be used to implement local oscillators(LO) in the upconversion and downconversion secTIons ofwireless receivers and transmitters. Both the RF and IF synthesizersconsist of a low noise digital PFD (phase frequencydetector), a precision charge pump, and a programmable referencedivider. The RF synthesizer has a --based fracTIonalinterpolator that allows programmable fracTIonal-N division.The IF synthesizer has programmable integer-N counters. Acomplete PLL (phase-locked loop) can be implemented if thesynthesizer is used with an external loop filter and VCO (voltagecontrolled oscillator).
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