ETC CX77314

PRODUCT SUMMARY
CX77314
PA Module for Quad-band GSM850/900 DCS1800 PCS1900 /
GPRS Applications
The CX77314 Power Amplifier Module (PAM) is designed in a compact form factor
for quad-band cellular handsets comprising GSM850/900, DCS1800, and PCS1900
operation. The PAM also supports Class 10 and Class 12 General Packet Radio
Service (GPRS) multi-slot operation.
The module consists of a GSM850/900 PA block and a DCS1800/PCS1900 PA
block, impedance-matching circuitry for 50 Ω input and output impedances, and
interface circuitry. The two separate Heterojunction Bipolar Transistor (HBT) PA
blocks are fabricated onto a single Gallium Arsenide (GaAs) die. One PA block
supports the GSM850/900 bands and the other PA block supports the DCS1800 and
PCS1900 bands. Both PA blocks share common power supply pins to distribute
current. A custom CMOS integrated circuit provides the internal interface circuitry,
including a current amplifier that minimizes the required power control current
(IAPC) to 10 µA, typical. The GaAs die, the Silicon (Si) die, and the passive
components are mounted on a multi-layer laminate substrate. The assembly is
encapsulated with plastic overmold.
Distinguishing Features
•
•
•
•
•
•
High efficiency
GSM850 55%
GSM900 55%
DCS 45%;
PCS 45%
Input/output matching
50 Ω internal
Small outline
8 mm × 10 mm
Low profile
1.5 mm maximum
Low APC current
10 µA, typical
Gold plated, lead-free contacts
Applications
The RF input and output ports are internally matched to 50 Ω to reduce the
• Quad-band cellular handsets
number of external components for a quad-band design. Extremely low leakage
encompassing
current (10 µA, typical) of the dual PA module maximizes handset standby time.
GSM850/900 (Class 4)
The CX77314 also contains band select switching circuitry to select GSM (logic 0)
DCS1800
and DCS/PCS (logic 1) as determined from the Band Select (BS) signal. In the
PCS1900, and
functional block diagram shown below, the BS pin selects the PA output
GPRS (Class 10 and Class 12)
(DCS/PCS OUT or GSM850/900 OUT) while the Analog Power Control (APC) controls
multi-slot operation
the level of output power.
Functional Block Diagram
HBT
GSM850/900 IN
Match
Power Control
Band Select
CMOS
Bias
Controller
DCS/PCS IN
Match
Match
GSM850/900 OUT
Match
DCS/PCS OUT
Advance Information
Skyworks Solutions, Inc. Proprietary and Confidential
© 2001-2003 Skyworks Solutions, Inc., All Rights Reserved.
101860P3
January 3, 2003
© 2001-2003, 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 SKYWORKS™ 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.
Skyworks™ products are not intended for use in medical, lifesaving or life-sustaining applications. Skyworks' customers using or
selling Skyworks™ 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.: Skyworks™, the Skyworks symbol, and "Breakthrough Simplicity"™.
Product names or services listed in this publication are for identification purposes only, and may be trademarks of third parties. Thirdparty brands and names are the property of their respective owners.
Additional information, posted at www.skyworksinc.com, is incorporated by reference.
General Information:
Skyworks Solutions, Inc.
4311 Jamboree Rd.
Newport Beach, CA. 92660-3007
www.skyworksinc.com