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Zarlink Semiconductor - 2.5G Multimode Transceiver

Numéro de référence ZL20250
Description 2.5G Multimode Transceiver
Fabricant Zarlink Semiconductor 
Logo Zarlink Semiconductor 





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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
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 World Phones - Quad Band
(850/900/1800/1900)
• Cellular Telematic Systems
ZL20250
2.5G Multimode Transceiver
Data Sheet
September 2003
Ordering Information
ZL20250/LCE (Tubes) 56 pin QFN
ZL20250/LCF (Tape and Reel) 56 pin QFN
-40°C to +85°C
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.
GSM/EDGE
IS136
UHF LO O/P
UHF VCO
900 MHz Tx
1900 MHz Tx
90°
Rx VHF
PLL
UHF
PLL
FM
Demod
Tx VHF
PLL
Serial
Interface
Control
Rx I
Rx Q
FM
RSSI
LOCK DET
Tx I
IQ
Mod
Tx Q
Tx IF Filter
(Opt)
Figure 1 - Block Diagram
1
Zarlink Semiconductor Inc.
Zarlink, ZL and the Zarlink Semiconductor logo are trademarks of Zarlink Semiconductor Inc.
Copyright 2003, Zarlink Semiconductor Inc. All Rights Reserved.

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