SA9025 - 900 MHz transmit modulator and 2.2 GHz fractional-N synthesizer
This specification defines the requirements for a transmitter modulator and fractional *N synthesizer IC to be used in cellular telephones which employ the North American Dual Mode Cellular System (IS *136).
* Reference and clock buffers * Control logic for programming
SA9025 Features
* Low current from 3.75V supply
* Low phase noise
* Main loop with internal charge pump and fractional compensation
* 3
* line serial interface bus
* Power down for the synthesizers
* Speedup mode for faster switching APPLICATIONS 48 47 46 45 4
