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CX77314

Conexant
Part Number CX77314
Manufacturer Conexant
Description PA Module for Quad-Band GSM850/900 DCS1800 PCS1900/GPRS Applications
Published Jul 15, 2005
Detailed Description Advance Information This document contains information on a product under development. The parametric information contai...
Datasheet PDF File CX77314 PDF File

CX77314
CX77314

Overview
Advance Information This document contains information on a product under development.
The parametric information contains target parameters that are subject to change.
CX77314 The CX77314 Power Amplifier Module (PAM) is designed in a compact form factor for quad-band cellular handsets comprising GSM850/900, DCS1800, and PCS1900 operation.
The PAM also supports Class 10 General Packet Radio Service (GPRS) multi-slot operation.
PA Module for Quad-band GSM850/900 DCS1800 PCS1900 / GPRS Applications Distinguishing Features • fo HBT Match Match In Functional Block Diagram GSM850/900 IN Match GSM850/900 OUT Power Control Band Select va Ad w w w .
d e e h s a t a DCS/PCS IN .
u t4 m o c Match CMOS Bias Controller DCS/PCS OUT Data Sheet Advance Information © 2001, 2002 Conexant Systems, Inc.
, All Rights Reserved.
101788P3 April 15, 2002 www.
DataSheet4U.
com Applications The RF input and output ports are internally matched to 50 Ω to reduce the • Quad-band cellular handsets number of external components for a quad-band design.
Extremely low leakage encompassing current (10 µA, typical) of the dual PA module maximizes handset standby time.
GSM850/900 (Class 4) The CX77314 also contains band select switching circuitry to select GSM (logic 0) DCS1800 and DCS/PCS (logic 1) as determined from the Band Select (BS) signal.
In the PCS1900, and functional block diagram shown below, the BS pin selects the PA output GPRS (Class 10) multi-slot (DCS/PCS OUT or GSM850/900 OUT) while the Analog Power Control (APC) controls operation the level of output power.
The module consists of a GSM850/900 PA block and a DCS1800/PCS1900 PA block, impedance-matching circuitry for 50 Ω input and output impedances, and interface circuitry.
The two separate Heterojunction Bipolar Transistor (HBT) PA blocks are fabricated onto a single Gallium Arsenide (GaAs) die.
One PA block supports the GSM850/900 bands and the other PA block supports the DCS1800 and PCS1900 bands.
Both PA blocks...


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