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參數(shù)資料
| 型號： | RM912-15 |
| 英文描述： | Amplifier. Other |
| 中文描述： | 放大器。其他 |
| 文件頁數(shù)： | 1/20頁 |
| 文件大?。?/td> | 273K |
| 代理商： | RM912-15 |
Data Sheet
2001, Conexant Systems, Inc., All Rights Reserved.
100635J
October 2001
RM912
Power Amplifier Module, 3–4 Volts, for CDMA/AMPS
(824–849 MHz)
The RM912 dual-mode Code Division Multiple Access (CDMA)/Advanced Mobile
Phone Service (AMPS) Power Amplifier is a fully matched 6-pin surface mount
module designed for mobile units operating in the 824-849MHz cellular bandwidth.
This device meets stringent IS95 CDMA linearity requirements to beyond 28 dBm
output power and 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 within the module package to optimize efficiency and power
performance into a 50
load. This device is manufactured with Conexant’s Gallium
Arsenide (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 RM912 can be supplied directly from a three cell
nickel-cadmium, single cell lithium-ion, or other suitable battery with an 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
RF
Input
(2)
RF
Output
(5)
VCC1
(1)
GND
GND
VCC2
(4)
VREF
(3)
(6, 7)
(6, 7)
MODULE
MMIC
Driver
Stage Bias
Power
Stage Bias
Input
Match
Inter
Stage
Match
PA
Output
Match
DA
Distinguishing Features
Low voltage positive bias supply
Good linearity
High efficiency
Dual mode operation
Large dynamic range
6-pin package
(6 x 6 x 1.5 mm)
Power down control
Applications
Digital cellular (CDMA)
Analog cellular (AMPS)
Wireless local loop
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