Part Number: INA326
Other Parts Discussed in Thread: OPA335

U71芯片:DAC1220E 。U87芯片:INA326EA
问题:U71输出1V电压,理论上恒流源应该输出10uA
现在U71输出电压固定1V左右变。负载电阻接在U75处,负载电阻20K时,测量输出电流为10.5uA,负载电阻变成120K时候,测量恒流输出电流为10.0uA,现在不知道是什么原因造成,恒流源输出电流,怎么因负载变化,恒流电流偏差这么大
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