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ADVANCE PRODUCT SUMMARY
SKY77418: LIPA(R) Module for CDMA / PCS (1850-1910 MHz)
Applications
* Personal Communications Services (PCS) * Wireless local loop (WLL)
Description
The SKY77418 Load Insensitive Power Amplifier (LIPATM) module is a fully matched 16-pad surface mount module developed for Code Division Multiple Access (CDMA) applications. This small and efficient power amplifier packs full coverage of the 1850-1910 MHz bandwidth into a single compact package. Because of high efficiencies attained throughout the entire power range, the SKY77418 delivers unsurpassed talk-time advantages. In addition, Skywork's patented LIPA technology ensures that the stringent linearity requirements are met, even with a load mismatch of 4:1. 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 load. This device is manufactured with Skyworks' InGaP 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 SKY77418 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 pad 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.
Features
* Low voltage positive bias - 3.2 V to 4.2 V * Low VREF - 2.85 V, nominal * Supports low collector voltage operation * Good linearity * High efficiency at all power levels - 20% at 16 dBm * Large dynamic range * 16-pad package - 4 x 4 x 1.5 mm * Power down control * InGaP * Digital VENABLE
VMODE (1)
MMIC
Bias and Temperature Compensation Circuit
MODULE
Skyworks offers lead (Pb)-free "environmentally friendly" packaging that is RoHS compliant (European Parliament for the Restriction of Hazardous Substances).
VENABLE (2) VREF (5) VBIAS (6)
RF IN (3) VCC1 (7, 15) VCC2 (9, 13) GND (4, 8, 10, 12, 14)
Input Match
DA
Inter-Stage Match
PA
Output Match
(11) RF OUT
200544_001
Figure 1. Functional Block Diagram
Skyworks Solutions, Inc. * Phone [781] 376-3000 * Fax [781] 376-3100 * sales@skyworksinc.com * www.skyworksinc.com
200544P1 * Skyworks Proprietary and Confidential Information. * Products and product Information are subject to change without notice. * May 17, 2006
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(c) 2006, Skyworks Solutions, Inc. All Rights Reserved. Information in this document is provided in connection with Skyworks Solutions, Inc. ("Skyworks") products. These materials are provided by Skyworks as a service to its customers and may be used for informational purposes only. Skyworks assumes no responsibility for errors or omissions in these materials. Skyworks may make changes to its products, specifications and product descriptions at any time, without notice. Skyworks makes no commitment to update the information and shall have no responsibility whatsoever for conflicts, incompatibilities, or other difficulties arising from future changes to its products and product descriptions. No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted by this document. Except as may be provided in Skyworks' Terms and Conditions of Sale for such products, Skyworks assumes no liability whatsoever. THESE MATERIALS ARE PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS OR IMPLIED, RELATING TO SALE AND/OR USE OF SKYWORKSTM PRODUCTS INCLUDING WARRANTIES RELATING TO FITNESS FOR A PARTICULAR PURPOSE, MERCHANTABILITY, PERFORMANCE, QUALITY OR NON-INFRINGEMENT OF ANY PATENT, COPYRIGHT OR OTHER INTELLECTUAL PROPERTY RIGHT. SKYWORKS FURTHER DOES NOT WARRANT THE ACCURACY OR COMPLETENESS OF THE INFORMATION, TEXT, GRAPHICS OR OTHER ITEMS CONTAINED WITHIN THESE MATERIALS. SKYWORKS SHALL NOT BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, INCLUDING WITHOUT LIMITATION, LOST REVENUES OR LOST PROFITS THAT MAY RESULT FROM THE USE OF THESE MATERIALS. SkyworksTM products are not intended for use in medical, lifesaving or life-sustaining applications. Skyworks' customers using or selling SkyworksTM products for use in such applications do so at their own risk and agree to fully indemnify Skyworks for any damages resulting from such improper use or sale. The following are trademarks of Skyworks Solutions, Inc.: SkyworksTM, the Skyworks symbol, and "Breakthrough Simplicity"TM. Product names or services listed in this publication are for identification purposes only, and may be trademarks of third parties. Third-party brands and names are the property of their respective owners. Additional information, posted at www.skyworksinc.com, is incorporated by reference.

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