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有关隔离运放AMC1301的输入问题

Other Parts Discussed in Thread: AMC1301

你好,我目前用到AMC1301这款隔离运放,当我输入接地,意思就是输入为0V时,在输入端测到有2mv的电压,因为我后端还有一级放大,所以这2mv的影响比较大,我想问一下怎么消除,或者减小。

输入端是由三个电阻分压得到,再进入运放,这个电阻有什么影响么?

查了手册上说输入失调电压范围为-200uv-200uv.

望各位大神指点迷津!