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OPA2277跟随电路, 单电源15V供电,输出零漂约为400mV

Other Parts Discussed in Thread: OPA2188

1.当运放的3脚和5脚输入为0V时,1脚和7脚有约400mv输出。

2.运放为15V单电源供电。

麻烦问一下大师们具体原因?