UMA1021
Overview
- Low phase noise
- Low current from 3 V supply
- Fully programmable main divider
- 3-line serial interface bus
- Independent fully programmable reference divider, driven from external crystal oscillator
- Hard and soft power-down control. APPLICATIONS
- 900 MHz and 2 GHz mobile telephones
- Portable battery-powered radio equipment. GENERAL DESCRIPTION The UMA1021AM BICMOS device integrates a prescaler, programmable dividers, and a phase comparator to implement a phase-locked loop. QUICK REFERENCE DATA SYMBOL VDD1, VDD2 VCC Itot Itot(pd) fRF fxtal fph(comp) Tamb PARAMETER digital supply voltage total supply current (IDD + ICC) total supply current in Power-down mode (IDD + ICC) RF input frequency crystal reference oscillator input frequency phase comparator frequency operating ambient temperature CONDITIONS VDD1 = VDD2 = VDD VCC = VDD = 5.5 V logic levels 0 V or VDD MIN. 2.7 2.7 - - 300 3 - -30
