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Home > Electronic Components > AD603 variable gain amplifier module voltage controlled adjustable 80dB voltage amplifier
  • AD603 variable gain amplifier module voltage controlled adjustable 80dB voltage amplifier
  • AD603 variable gain amplifier module voltage controlled adjustable 80dB voltage amplifier
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  • AD603 variable gain amplifier module voltage controlled adjustable 80dB voltage amplifier
  • AD603 variable gain amplifier module voltage controlled adjustable 80dB voltage amplifier
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AD603 variable gain amplifier module voltage controlled adjustable 80dB voltage amplifier

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AD603 可变增益放大器模块 压控可调 80dB 电压放大器
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  • AD603 variable gain amplifier module voltage controlled adjustable 80dB voltage amplifier
  • AD603 variable gain amplifier module voltage controlled adjustable 80dB voltage amplifier
  • AD603 variable gain amplifier module voltage controlled adjustable 80dB voltage amplifier
  • AD603 variable gain amplifier module voltage controlled adjustable 80dB voltage amplifier
1/1
  • AD603 variable gain amplifier module voltage controlled adjustable 80dB voltage amplifier
  • AD603 variable gain amplifier module voltage controlled adjustable 80dB voltage amplifier
  • Description

优势和特点

  • 线性dB增益控制
  • 引脚可编程增益范围
    −11 dB至+31 dB(90 MHz带宽) 
    9 dB至51 dB(9 MHz带宽)
  • 所有中间范围(例如−1 dB至+41 dB，带宽：30 MHz)
  • 带宽与可变增益无关
  • 输入噪声谱密度：1.3 nV/√Hz
  • 增益精度：±0.5 dB(典型值)

 

 

产品详情

AD603是一款低噪声、电压控制型放大器，用于射频(RF)和中频(IF)自动增益控制(AGC)系统。它提供精确的引脚可选增益，90 MHz带宽时增益范围为−11 dB至+31 dB，9 MHz带宽时增益范围为+9 dB至+51 dB。用一个外部电阻便可获得任何中间增益范围。折合到输入的噪声谱密度仅为1.3 nV/√Hz，采用推荐的±5 V电源时功耗为125 mW。

 

增益以dB为线性，经过精密校准，而且不随温度和电源电压而变化。增益由高阻抗(50 MΩ)、低偏置(200 nA)差分输入控制；比例因子为25 mV/dB，因此仅需要1 V的增益控制电压就能覆盖增益范围的中间40 dB。无论选择何种范围，均提供1 dB的超量程和欠量程。对于40 dB变化，增益控制响应时间不到1 μs。

差分增益控制接口允许使用差分或单端正或单端负控制电压。可将数个这种放大器级联起来，由其增益控制增益偏置以优化系统信噪比(SNR)。

AD603可以驱动低至100 Ω的负载阻抗，且失真较低。对于采用5 pF分流的500 Ω负载，10 MHz时，±1 V正弦输出的总谐波失真通常为−60 dBc。进入500 Ω负载的峰值额定输出为±2.5 V（最小值）。

AD603采用专有的专利电路结构X-AMP®。X-AMP含有0 dB至-42.14 dB可变衰减器，后接固定增益放大器。由于存在衰减器，放大器永远不必处理较大输入，并且可以用负反馈来定义其（固定）增益和动态性能。衰减器具有经激光调整至±3%的100 Ω输入电阻，且包含7级R-2R梯形网络，使触点之间的衰减为6.021 dB。利用专有插值技术，可提供以dB为单位的线性连续增益控制功能。

AD603的工作温度范围为−40°C至+85°C。

应用

  • 射频/中频AGC放大器
  • 视频增益控制
  • 模数范围扩展
  • 信号测量

数据手册

http://www.analog.com/media/en/technical-documentation/data-sheets/AD603.pdf

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