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什么芯片能符和这个要求呢,推荐下

Other Parts Discussed in Thread: OPA335

有个传感器的输出电压是30~50MV之间,但是测量时放大器的阻抗要求在100-1000GΩ之间

所以输出端输要做一个一级阻抗变换电路,有没有什么芯片推荐下,放大器用的是opa335