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INA122信号问题

Other Parts Discussed in Thread: INA122

您好,我利用INA122双电源放大直流小信号,实际输出和理论输出总是有30mV左右的偏差,请问是正常现象吗,这是失调电压造成的吗?

我之后短接输入端并接地,输出6mV左右,请问这是失调电压吗