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PDF RM912 Data sheet ( Hoja de datos )
| Número de pieza | RM912 | |
| Descripción | CDMA/AMPS 3-4 Volt Power Amplifier (824849 MHz) | |
| Fabricantes | ETC | |
| Logotipo |  |
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RM912
CDMA/AMPS 3–4 Volt Power Amplifier (824–849 MHz)
The RM912 dual mode Code Division Multiple Access (CDMA)/Advanced Mobile
Distinguishing Features
Phone Service (AMPS) Power Amplifier is a fully matched 6-pin LCC surface mount
module designed for mobile units operating in the 824-849 MHz cellular bandwidth. • Low voltage positive bias supply
This device meets stringent IS95 CDMA linearity requirements to beyond 28 dBm • Good linearity
output power and can be driven to power output levels beyond 31 dBm for high
• High efficiency
efficiency FM mode operation. A single GaAs Microwave Monolithic Intergrated
• Dual mode operation
Circuit (MMIC) contains all active circuitry in the module. The MMIC contains
• Large dynamic range
on-board bias circuitry, as well as input and interstage matching circuits. The output
•
6-pin LCC package
(6 x 6 x 1.5 mm)
match is realized off-chip within the module package to optimize efficiency and power • Power down control
performance into a 50 Ω load. This device is manufactured with Conexant’s GaAs HBT
process that provides for all positive voltage DC supply operation while maintaining Applications
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 • Digital cellular (CDMA)
output in the 3-4 volt range. Power down is accomplished by setting the voltage on • Analog cellular (AMPS)
the low current reference pin to zero volts. No external supply side switch is needed • Wireless local loop
as typical “off” leakage is a few microamperes with full primary voltage supplied from
the battery.
Functional Block Diagram
VREF
(3)
VCC1
(1)
VCC2
(4)
RF
Input
(2)
Driver
Stage Bias
Power
Stage Bias
Input
Match
Inter
DA Stage
Match
MMIC
PA
Output
Match
RF
Output
(5)
GND
(6, 7)
GND
(6, 7)
MODULE
Data Sheet
2000, Conexant Systems, Inc. All Rights Reserved.
100635G
August 2000
1 page  
RM912
CDMA/AMPS 3–4 Volt Power Amplifier (824–849 MHz)
Characterization Data
Characterization Data
The following charts illustrate the characteristics of a typical RM912 Power Amplifier tested in the
evaluation board described in the following section. The amplifier was selected by characterizing a
group of devices and choosing a part with average electrical performance at both nominal and
worst case (limit) conditions. Figures 1 through 4 illustrate the digital signal characteristics and
Figures 5 through 8 illustrate the analog characteristics of the RM912.
Figure 1. Digital Gain vs. Output Power
Vref = 3.0V, Vcc = 3.4V
32.50
30.00
27.50
25.00
22.50
0.00
5.00
10.00
15.00
Output Power (dBm)
20.00
25.00
30.00
Legend
N
I
L
824 MHz @ –30 °C
837 MHz @ –30 °C
849 MHz @ –30 °C
N 824 MHz @ +25 °C
I 837 MHz @ +25 °C
L 849 MHz @ +25 °C
N 824 MHz @ +85 °C
I 837 MHz @ +85 °C
L 849 MHz @ +85 °C
100635G
Conexant
5
5 Page 
RM912
CDMA/AMPS 3–4 Volt Power Amplifier (824–849 MHz)
Figure 11. Digital Adjacent Channel Power Magnitude (ACP2) vs. Output Power
Characterization Data
80.00
70.00
60.00
50.00
40.00
30.00
20.00
10.00
0.00
3.20V
- 30C
COL D
3.40V
-30C
R OOMT EMP ER AT UR E
824 MHz 836.5 MHz 849 MHz
HOT
4.20V
- 30C
3.20V
25C
3.40V
25C
4.20V
25C
Co l l ect o r V o l t ag e
C as e T emp er at ur e
3.20V
85C
3.40V
85C
4.20V
85C
Figure 12. Analog Gain vs. Output Power
40.00
35.00
30.00
25.00
20.00
15.00
10.00
5.00
0.00
3.20V
- 30C
COL D
3.40V
- 30C
R OOMT EMP ERAT URE
824 MHz 836.5 MHz 849 MHz
HOT
4.20V
- 30C
3.20V
25C
3.40V
25C
4.20V
25C
Co l l ect or V ol t age
Cas e T emper at ur e
3.20V
85C
3.40V
85C
4.20V
85C
100635G
Conexant
11
11 Page | ||
| Páginas | Total 20 Páginas | |
| PDF Descargar | [ Datasheet RM912.PDF ] | |
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