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CX77107 Datasheet

  • CX77107

  • CX77107: PAM for CDMA / PCS (1850–1910 MHz)|PA Modules for ...

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DATA SHEET
CX77107: PA Module for CDMA / PCS (1850鈥?910 MHz)
APPLICATIONS
鈥?/div>
Personal Communications Services
(PCS)
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Wireless local loop (WLL)
FEATURES
DISTINGUISHING FEATURES
鈥?/div>
Low voltage positive bias supply
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
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The CX77107 Power Amplifier Module (PAM) is a fully matched 10-pin surface mount
module developed for Personal Communications Service (PCS) and Wireless Local Loop
(WLL) applications. This small and efficient Power Amplifier packs full 1850鈥?910 MHz
bandwidth coverage into a single compact package. The CX77107 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 low current (VCONT)
pin is provided to improve efficiency for the low RF power range of operation.
The single Gallium Arsenide (GaAs) Microwave Monolithic Integrated Circuit (MMIC) contains
all active circuitry in the module. The MMIC contains on-board bias circuitry, as well as
input and interstage matching circuits. The output match is realized off-chip within the
module package to optimize efficiency and power performance into a 50 W load. This
device is manufactured with Skyworks鈥?GaAs Heterojunction Bipolar Transistor (HBT)
process that provides for all positive voltage DC supply operation while maintaining high
efficiency and good linearity. Primary bias to the CX77107 is supplied directly from a three-
cell nickel cadmium, a single-cell lithium ion, or other suitable battery with an output in the
3 to 4 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.
鈥?/div>
(3.2 V to 4.2 V)
Good linearity
High efficiency
Large dynamic range
10-pin package
4 mm x 4 mm x 1.5 mm
Power down control
Low power-state control
InGaP
IS95/CDMA2000
Full U.S. PCS coverage
VREF
(5)
VCC1
(1)
VCONT
(4)
VCC2
(10)
Driver
Stage Bias
Power
Stage Bias
RF IN (2)
Input
Match
DA
Inter
Stage
Match
PA
Output
Match
(8) RF OUT
MMIC
MODULE
(3, 6, 7, 9)
GND
(3, 6, 7, 9)
GND
101782_001
Figure 1. Functional Block Diagram
Skyworks Solutions, Inc., Proprietary Information
101782A
781] 376-7000 鈥?FAX [781] 376-3100 鈥?SALES@SKYWORKSINC.COM 鈥?WWW.SKYWORKSINC.COM
1
JULY 3, 2003

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