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RM914 Datasheet(PDF) 1 Page - Skyworks Solutions Inc. |
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RM914 Datasheet(HTML) 1 Page - Skyworks Solutions Inc. |
1 / 16 page Data Sheet 100637D © 2001, 2002 Skyworks Solutions, Inc., All Rights Reserved. March 22, 2002 RM914 Power Amplifier Module for AMPS Applications (824–849 MHz) The RM914 Advanced Mobile Phone Service (AMPS) Power Amplifier is a fully matched 6-pin surface mount module designed for mobile units operating in the 824-849 MHz cellular bandwidth. This device can be driven to power output levels beyond 31 dBm for high efficiency FM mode operation. A single 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 and within the module package to optimize efficiency and power performance into a 50 Ω load. This device is manufactured with Skyworks’s GaAs HBT process that provides for all positive voltage DC supply operation while maintaining high efficiency. Primary bias to the RM914 can be supplied directly from a three cell nickel-cadmium, single cell lithium-ion, or other suitable battery with output in the 3-4 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. Functional Block Diagram MMIC MODULE RF Input (2) RF Output (5) VCC1 GND GND VCC2 VREF Driver Stage Bias Power Stage Bias Input Match DA Inter Stage Match PA Output Match (6, 7) (3) (1) (4) (6, 7) Distinguishing Features • Low voltage positive bias supply (3 to 4 Volts, typical) • High efficiency • Large dynamic range • 6-pin package (6mm x 6mm x 1.5 mm) • Power down control Applications • Analog cellular (AMPS) • Wireless local loop (WLL) |
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