UMA1018M
FEATURES
- Low current from 3 V supply
- Fully programmable RF divider
- 3-line serial interface bus
- Second synthesizer to control first IF or offset loop frequency
- Independent fully programmable reference dividers for each loop, driven from external crystal oscillator
- Dual phase detector outputs to allow fast frequency switching
- Integrated digital-to-analog converter
- Dual power-down modes. APPLICATIONS
- 900 MHz mobile telephones
- Portable battery-powered radio equipment. GENERAL DESCRIPTION
The UMA1018M BICMOS device integrates prescalers, programmable dividers, and phase parators to implement two phase-locked loops. The device is designed to operate from 3 Ni Cd cells, in pocket phones, with low current and nominal 5 V supplies. QUICK REFERENCE DATA SYMBOL VCC, VDD ICC + IDD PARAMETER supply voltage principal synthesizer supply current principal and auxiliary synthesizer supply current ICCPD, IDDPD current in power-down mode per supply f VCO f AI f XTAL f PPC f APC Tamb...
