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OPA2317做跟随的问题

Other Parts Discussed in Thread: INA139, OPA2317, OPA317

用OPA2317做的一个跟随器,如图片所示(R2接的是INA139的输出管脚),但是实测结果与仿真结果相差较大。实验测得:VP_1:0.160mV;VP_3:0.011mV,VP_4:0.1mV左右,VP_5:0.016mV,按照跟随器的原理,VP_1也应该为0.016mV左右啊,请问各位大神,是什么原因造成了这一种情况的?