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PDF SKY77179 Data sheet ( Hoja de datos )
| Número de pieza | SKY77179 | |
| Descripción | AutoSmart PA Module | |
| Fabricantes | Skyworks Solutions | |
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ADVANCE PRODUCT SUMMARY
SKY77179 AutoSmart™ PA Module for WCDMA / HSDPA
(824–849 MHz)
Applications
• WCDMA handsets
• HSDPA handsets
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
• 3GPP
Description
The SKY77179 AutoSmart™ Power Amplifier Module (PAM) is a fully matched, 8-pin surface mount
module developed for Wideband Code Division Multiple Access (WCDMA) / High Speed Downlink
Packet Access (HSDPA) 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 WCDMA 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 3GPP linearity requirements up to and exceeding
28 dBm output power. 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 SKY77179 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 SKY77179 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.
Skyworks offers lead
(Pb)-free "environmentally
friendly" packaging
that is RoHS compliant
(European Parliament
for the Restriction of
Hazardous Substances).
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
200615_001
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com
200615P1 • Skyworks Proprietary and Confidential information. • Products and product information are subject to change without notice. • December 14, 2006
1
1 page | ||
| Páginas | Total 2 Páginas | |
| PDF Descargar | [ Datasheet SKY77179.PDF ] | |
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