Preliminary Information
This document contains information on a new product. The parametric information, although not
fully characterized, is the result of testing initial devices.
CX77133
Power Amplifier Module for CDMA PCS (1850鈥?910 MHz)
The CX77133 Power Amplifier Module (PAM) is a fully matched, 6-pin surface mount
module developed for Personal Communications Service (PCS) and wireless local
loop applications. This small and efficient Power Amplifier packs a full 1850鈥?910
MHz bandwidth coverage into a single compact package.
The CX77133 meets the stringent spectral linearity requirements of Code Division
Multiple Access (CDMA) PCS transmission with high power added efficiency for
power output of up to 28 dBm. A single Gallium Arsenide (GaAs) Microwave
Monolithic Integrated Circuit (MMIC) contains all the active circuitry in the module.
The MMIC contains on-board bias circuitry, as well as input and interstage matching
circuits. Output match is realized off-chip within the module package to optimize
efficiency and power performance into a 50
鈩?/div>
load.
This device is manufactured with Skyworks鈥?GaAs Heterojunction Bipolar Transistor
(HBT) process, which provides for all positive voltage DC supply operation while
maintaining high efficiency and good linearity. Primary bias to the CX77133 is
supplied directly from a three-cell nickel cadmium, a single-cell lithium ion, or other
suitable battery with an output in the 3鈥? volt range. Power down is accomplished by
setting the voltage on the low current reference pin to zero volts. No external supply
side switch is needed as typical 鈥渙ff鈥?leakage is a few microamperes with full primary
voltage supplied from the battery.
Distinguishing Features
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鈥?/div>
鈥?/div>
鈥?/div>
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Low voltage positive bias supply
(3 to 4 Volts)
Good linearity
High efficiency
Large dynamic range
6-pin package (6 x 6 x 1.5 mm)
Power down control
Applications
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Personal communications
services (PCS)
Wireless local loop (WLL)
Functional Block Diagram
VREF
(3)
VCC1
(1)
VCC2
(4)
Driver
Stage Bias
Power
Stage Bias
RF
Input
(2)
Input
Match
DA
Inter
Stage
Match
MMIC
PA
Output
Match
RF
Output
(5)
MODULE
(6, 7)
GND
(6, 7)
GND
Data Sheet
Preliminary Information
漏 2001, 2002 Skyworks Solutions, Inc., All Rights Reserved.
101537P6
March 27, 2002
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