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OPA2180: 当反相端串10K电阻接地,无反馈回路,为什么反相端还有3V电压存在。

Part Number: OPA2180

当反相端串10K电阻接地,无反馈回路,为什么反相端还有3V电压存在?不是应该为0V吗?

如图所示的A点电压,实测时为3V,不应该是0V吗?