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MSP430F149: 关于AD转换序列通道单次转换问题,如何处理通道的串扰问题?

Part Number: MSP430F149

使用P60至P65作为测量通道,当P60变化为较大值时,P61外部模拟信号为某一固定值,P61数值会有增加;当P65变化为较大值时,P61外部模拟信号为某一固定值,数值也会有增加,测试了下大概有0.5%左右的影响。请问为什么会有影响?有没有什么办法解决?