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参数资料
| 型号： | ACPM-7833-TR1 |
| 元件分类： | 放大器 |
| 英文描述： | 1850 MHz - 1910 MHz RF/MICROWAVE NARROW BAND MEDIUM POWER AMPLIFIER |
| 封装： | 4 X 4 MM, 1.10 MM HEIGHT, SMT, 10 PIN |
| 文件页数： | 3/20页 |
| 文件大小： | 208K |
| 代理商： | ACPM-7833-TR1 |
11
Power Mode
PA_ON
Vcntl
Power Range
Shut Down
LOW
0V
—
High Power
HIGH
2.5V
- 28.5 dBm
To Duplexer
Battery
Vcntl
PA
TxIC
Switch Circuit for PA
Baseband
IC
PA_ON
Enable
Vdd1
Vdd2
Vbias
Vcntl
PMIC or LDO
Note: PMIC: Power Management IC
LDO: Low Drop Output (Regulator)
Design Tips to use Vcntl pin
Power Amplifier Control Using Vcntl Pin on ACPM-7833
Power amplifier control scheme in CDMA systems is
one of the important and challenging aspects of CDMA-
based handset design. Handset designers must balance
maintaining adequate linearity while optimizing
efficiency at high, medium and low output power
levels. The primary method to achieve these goals is
to adjust the bias of the PA as a function of output
power. Theoretically, the best efficiency would be
achieved when the bias of the PA is continually
adjusted based on the output power requirement of
the PA. However, implementing this type of circuit can
be complex and costly. Therefore several different
approaches have been developed to provide an
acceptable trade-off between optimum efficiency and
optimum manufacturability. This application section
reviews four methods of controlling the bias of a CDMA
power amplifier: fixed, step, logical and dynamic.
1. Fixed Bias Control
Using a fixed bias point on the PA is the traditional
method, and it is the simplest. For example, the
recommended value of the fixed control voltage on
the Vcntl pin for the ACPM-7833 is 2.5V. The Vcntl pin
on the PA is controlled by PA_ON pin of the baseband
IC. When PA_ON is HIGH, the output RF signal of the
PA is enabled, enabling the subscriber unit to transmit
the required data. The switch circuit also controls the
on/off state of the PA.
Below is an example of how to control the the output
of the PA using PA_ON and Vcntl pins.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ACPM-7868 | 制造商:AVAGO 制造商全称:AVAGO TECHNOLOGIES LIMITED 功能描述:5 x 5 mm Power Amplifier Module Linear Quad-Band GSM/EDGE |
| ACPM-7868-BLK | 制造商:Avago Technologies 功能描述:PA MODULE, LINEAR EDGE, 5X5MM - Bulk |
| ACPM-7868-TR1 | 制造商:Avago Technologies 功能描述:PA MODULE, LINEAR EDGE, 5X5MM |
| ACPM-7881-BLK | 功能描述:射频放大器 W-CDMA Amp 1920-1980MHz RoHS:否 制造商:Skyworks Solutions, Inc. 类型:Low Noise Amplifier 工作频率:2.3 GHz to 2.8 GHz P1dB:18.5 dBm 输出截获点:37.5 dBm 功率增益类型:32 dB 噪声系数:0.85 dB 工作电源电压:5 V 电源电流:125 mA 测试频率:2.6 GHz 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:QFN-16 封装:Reel |
| ACPM-7881-TR1 | 功能描述:射频放大器 W-CDMA Amp 1920-1980MHz RoHS:否 制造商:Skyworks Solutions, Inc. 类型:Low Noise Amplifier 工作频率:2.3 GHz to 2.8 GHz P1dB:18.5 dBm 输出截获点:37.5 dBm 功率增益类型:32 dB 噪声系数:0.85 dB 工作电源电压:5 V 电源电流:125 mA 测试频率:2.6 GHz 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:QFN-16 封装:Reel |
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