ZL20250

www.DataSheet4U.com ZL20250 2.5G Multimode Transceiver Data Sheet Features Quad Band GSM (800/900/1800/1900 MHz) Compatible Dual Band IS136 (800/1900 MHz) Compatible GPRS Class 12 and EDGE Capable Fully Integrated Dual Band Transceiver Receive - IF to Baseband I and Q Transmit - Baseband I / Q to RF Integrated Filters FM Demodulator RF and IF Synthesizers Fully Programmable via serial bus 3 Volt operation Small scale package Ordering Information ZL20250/LCE (Tubes) 56 pin QFN ZL20250/LCF (Tape and Reel) 56 pin QFN -40 ° C to +85° C September 2003 Description The ZL20250 is a fully integrated transceiver for multimode IS136/GSM/GPRS/EDGE handsets. The dual IF inputs to the receive path are amplified and down-converted to baseband I and Q signals. Gain control and baseband filtering are provided. A FM demodulator is also provided where AMPS compatibility is required. The transmit path consists of a quadrature modulator, gain control at IF and up-conversion to RF. Dual band RF outputs are provided. ZL20250 also includes a fractional N RF synthesizer and two IF synthesizers to provide all local oscillator signals required. Flexible programming is provided via a 3 wire serial bus. Additional control pins allow accurate timing control when switching between modes. Applications GAIT IS136/GSM/EDGE Mobile Telephones Dual Band (850/PCS1900) TDMA/AMPS Mobile Telephones Cellular 850MHz TDMA/AMPS Mobile Telephones PCS1900 TDMA Mobile Telephones 2.5G...