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输入是什么信号? 电压范围为多大?可是目前(Vin+)=(Vin-)=2.5V。Zhihua Kong 说:是的,放大微小的电压信号
测量的是与20Khz的电磁波匹配的电容电感选频网络输出的正弦电压信号,信号Vpp大约范围0-15mV变化
两个输入通道一直有信号?应该是差分输入才对。而且要确保共模电压一直满足要求。你处REF管脚是如何处理的