CX77144 Datasheet, PDF (1/12 Pages) Skyworks Solutions Inc. – Power Amplifier Module for CDMA (887-925 MHz)

DATA SHEET
CX77144: Power Amplifier Module for CDMA (887–925 MHz)
Applications
• CDMA for Japan
• Wireless Local Loop (WLL)
Features
• Low voltage positive bias
supply
- 3.2 V to 4.2 V
• Low VREF
- 2.85 V, nominal
• 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
• CDMA2000 / IS95
Description
The CX77144 Power Amplifier Module (PAM) is a fully matched, 10-pin surface mount module
developed for cellular handset applications utilizing Code Division Multiple Access (CDMA) and
Wireless Local Loop (WLL). This small and efficient power amplifier module packs a full 887–925 MHz
bandwidth coverage into a single compact package. The device meets the stringent IS95
requirements up 27.5 dBm output power and up to 27 dBm for CDMA2000. A low current digital pin
(VCONT) provides improved 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 and within the module package to optimize
efficiency and power performance into a 50 Ω load. This device is manufactured with Skyworks’ 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 CX77144 is
supplied directly from a three-cell Ni-Cd, a single-cell Li-Ion, or other suitable battery with an output
in the range of 3.2 to 4.2 volts. 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 “off” leakage is a few
microamperes with full primary voltage supplied from the battery.
Figure 1. Functional Block Diagram
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [e-mail] • www.skyworksinc.com
102047A • Skyworks Proprietary Information. • Products and product information are subject to change without notice. • June 9, 2004
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