UMA1015AM

INTEGRATED CIRCUITS DATA SHEET UMA1015AM Low-power dual frequency synthesizer for radio communications Product specification Supersedes data of 1997 Jun 10 File under Integrated Circuits, IC17 1997 Sep 03 Philips Semiconductors Product specification Low-power dual frequency synthesizer for radio communications FEATURES Two fully programmable RF dividers up to 1.1 GHz Fully programmable reference divider up to 35 MHz 2 : 1 or 1 : 1 ratio of selectable reference frequencies Fast three-line serial bus interface Adjustable phase comparator gain Programmable out-of-lock indication for both loops On-chip voltage doubler Low current consumption from 3 V supply Separate power-down mode for each synthesizer Up to 4 open-drain output ports Crystal input frequency signal inverted and buffered output on separate pin. APPLICATIONS Cordless telephone Hand-held mobile radio. QUICK REFERENCE DATA SYMBOL VDD1, VDD2 VCC VCCvd PARAMETER digital supply voltage CONDITIONS VDD1 = VDD2 MIN. 2.7 2.7 − − − − 50 3 − − −30 − − GENERAL DESCRIPTION UMA1015AM The UMA1015AM is a low-power dual frequency synthesizer for radio communications which operates in the 50 to 1100 MHz frequency range. Each synthesizer consists of a fully programmable main divider, a phase and frequency detector and a charge pump. There is a fully programmable reference divider common to both synthesizers which operates up to 35 MHz. The device is programmed via a 3-wire serial bus which operates up to...