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Port_IN2+接的输入,其参考点是什么?Port_IN2-接地,这里的地是与INA849的地是同一个地吗?
Vref2接的2.5V是否与INA849使用同一个参考点?
输出端电路是怎样的?您去掉后端电路,直接悬空测量输出端,测量结果是一样的吗?