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参数资料
| 型号： | ACPM-1403 |
| 元件分类： | 放大器 |
| 英文描述： | 1920 MHz - 1940 MHz RF/MICROWAVE NARROW BAND MEDIUM POWER AMPLIFIER |
| 封装： | 3 X 3 MM, 1 MM HEIGHT, ROHS COMPLIANT, PLASTIC, SMT, 8 PIN |
| 文件页数： | 15/16页 |
| 文件大小： | 406K |
| 代理商： | ACPM-1403 |
8
Peripheral Circuit in Handset
Figure 17. Peripheral circuit
Notes:
Recommended voltage for Vref is 2.85 V.
Place C1 near to Vref pin.
Place C3 and C4 close to pin 4 (Vcc1) and pin 5 (Vcc2). These capacitors can affect the RF performance.
Use 50 W transmission line between PAM and Duplexer and make it as short as possible to reduce conduction loss.
π-type circuit topology is good to use for matching circuit between PA and Duplexer.
Figure 18. Calibration procedure
Figure 19. Setting of offset between rising and falling power
TX_AGC
Low Mode
High Mode
Min. PWR
Falling Rising
Max. PWR
Pout
GAIN
Low Mode
High Mode
Falling
Rising
Pout
Offset Value (Difference between Rising Point
and Falling Point)
Offset value, which is the difference between the rising
point (output power where PA mode changes from low
mode to high mode) and falling point (output power
where PA mode changes from high mode to low mode),
should be adopted to prevent system oscillation. 3 to 5
dB is recommended for hysteresis.
Calibration
Calibration procedure is shown in Figure 18. Two calibra-
tion tables, high mode and low mode respectively, are
required for Cool PAM, which is due to gain difference in
each mode. For continuous output power at the mode
change points, the input power should be adjusted ac-
cording to gain step during the mode change.
Duplexer
RF
SAW
MSM
PA_RO
PA_ON
RF Out
Output Matching Circuit
RF In
C1
C8
C7
C6
L1
C2
VBATT
C5
C4
C3
+2.85 V
ACPM-1403
Vref
GND
Vcont
GND
RF IN
RF OUT
Vcc2
Vcc1
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相关代理商/技术参数 |
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| ACPM-2301 | 制造商:Avago 功能描述:UMTS PA module |
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