SA9025 Overview
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 and power down modes V CC GND MCLK V CC RCLK GND GND PHA PHI RN XTAL1 36 35 34 33 32 INA.
SA9025 Key Features
- Low current from 3.75V supply
- Low phase noise
- Main loop with internal charge pump and fractional pensation
- 3-line serial interface bus
- Power down for the synthesizers
- Speedup mode for faster switching