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OPA380+TH4031用作跨导

Other Parts Discussed in Thread: OPA380, OPA657, OPA847

我想用OPA380+TH4031用作跨导,采集40dB动态范围的光信号,请问OPA380是在输入端加偏置好,还是在输出端加-5V下拉好呢?另外对于噪声的处理,有什么好的建议?谢谢!