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电压跟随器输出值

Other Parts Discussed in Thread: OPA4188, OPA317

使用OPA4188运放搭建一个电压跟随器,当输入电压为零时,运放输出为大约7mV,查看芯片手册发现零点漂移和失调电压都很低为微幅级别的,不至于输出7mV,求大神指点