SKY77741 Datasheet, PDF (1/2 Pages) Skyworks Solutions Inc. – Dual-Band Power Amplifier Module

PRODUCT SUMMARY
SKY77741 SkyHi™ Dual-Band Power Amplifier Module for
CDMA2000/ WCDMA/ HSDPA/ HSUPA Band I (1920–1980 MHz)
Band VIII (880–915 MHz)
APPLICATIONS
• WCDMA handsets
• HSDPA
• HSUPA
• CDMA2000
• EVDO
Features
• Low voltage positive bias
supply: 3.0 V to 4.5 V
• Good linearity
• High efficiency
Band I: 47% at 28.3 dBm
Band VIII: 47% at 28.5 dBm
• Large dynamic range
• Small, low profile package
- 4 mm x 3 mm x 0.9 mm
- 16-pad configuration
• Power down control
• InGaP
• Supports low collector
voltage operation
• Digital Enable
• No VREF required
• CMOS compatible control
signals
• Integrated Directional
Coupler
The SKY77741 SkyHi™ Power Amplifier Module (PAM) is a fully matched, 16-pad, surface mount
module developed for Code Division Multiple Access (CDMA) and Wideband Code Division Multiple
Access (WCDMA) applications. This small and efficient module packs full WCDMA Band I and Band VIII
coverage into a single compact package. The SKY77741 meets the stringent spectral linearity
requirements of WCDMA transmission, with high power added efficiency for power output to
28.3 dBm (Band I) and 28.5 dBm (Band VIII). The SKY77741 meets the stringent spectral linearity
requirements of High Speed Downlink Packet Access (HSDPA) data transmission with high power
added efficiency. A directional coupler is integrated into the module thus eliminating the need for any
external coupler.
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 into a 50-ohm load is realized off-chip within the module package to
optimize efficiency and power performance.
The SKY77741 PAM is manufactured with Skyworks’ InGaP GaAs Heterojunction Bipolar Transistor
(HBT) BiFET process that provides for all positive voltage DC supply operation while maintaining high
efficiency and good linearity. No VREF voltage is required. Power down is accomplished by setting the
voltage on VEN_HB and VEN_LB 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. SKY77741 Functional Block Diagram
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [e-mail] • www.skyworksinc.com
201796B • Skyworks Proprietary and Confidential information. • Products and product information are subject to change without notice. • November 21, 2012
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