SKY77163 Datasheet, PDF (1/2 Pages) Skyworks Solutions Inc. – AutoSmart PA Module for CDMA / AMPS (824-849 MHz)

ADVANCE PRODUCT SUMMARY
SKY77163 AutoSmart™ PA Module for CDMA / AMPS
(824–849 MHz)
Applications
• Digital cellular (CDMA)
• Analog cellular (AMPS)
• Wireless local loop (WLL)
Features
• Low voltage positive bias
supply
- 3.2 V to 4.2 V
• Low VREF
- 2.85 V, nominal
• Low IREF
- less than 2 mA
• Good linearity
• High efficiency
• Large dynamic range
• 8-pin package
- 3 x 3 x 1.2 mm
• Power down control
• InGaP
• IS95/CDMA2000
Description
The SKY77163 AutoSmart™ Power Amplifier Module (PAM) is a fully matched, 8-pin surface mount
module developed for Code Division Multiple Access (CDMA) / Advanced Mobile Phone Service (AMPS)
and Wireless Local Loop (WLL) applications.
AutoSmart™ power amplifier technology internally adjusts the RF transistor bias level throughout the
dynamic operating range to minimize battery current consumption and ensure sufficient linear
performance to meet CDMA system requirements. The result is a significant savings in average
battery current without the complications of a system-supplied mode function signal or analog bias
control. AutoSmart™ response time is more than adequate for RF access probe and discontinuous
transmission operation.
This small and efficient module packs full coverage of the 824–849 MHz bandwidth into a single
compact package. The device meets the stringent IS95 CDMA linearity requirements up to and
exceeding 28 dBm output power, and can be driven to levels beyond 31 dBm for high efficiency in FM
mode 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. Output match to a 50-ohm load is realized off-chip and within the
module package to optimize efficiency and power performance.
The SKY77163 AutoSmart™ PAM 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 SKY77163 is supplied directly from a three-cell
Ni-Cd, a single-cell Li-Ion, or other suitable battery with an output in the 3.2 to 4.2 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 “off” leakage is a few microamperes with full primary
voltage supplied from the battery.
VREF
VBIAS
VCC
RF_IN
GND
Driver
Stage Bias
Feedback
Control Circuit
Power
Stage Bias
MODULE
Input
Match
DA
Inter-Stage
PA
Output
Match
Match
Figure 1. Functional Block Diagram
RF_OUT
200337_001
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [e-mail] • www.skyworksinc.com
200337P3 • Skyworks Proprietary and Confidential information. • Products and product information are subject to change without notice. • February 6, 2006
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