上图中，Iin+，Iin-作为电流采样的输入端口，当接着分流器时，采样正常。当不接分流器时，相当于悬空状态时，输入端口Iin+，Iin-有0.566V的电压，AMC1301的2,3脚也是0.566V电压；AMC1301的6,7脚输出2.5V左右电压。 请问为何Iin+，Iin悬空时AMC1301输入和输出的差分信号不为0V左右，有何改进电流的采样方案可提供。谢谢！
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