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我用的TM4C123GH6PZ，想差分采样，问一下可以采负压吗？电压范围是多少？
负压肯定是进不去的，会烧毁MCU，你外部加个转换电路吧，采集的范围是0-Vcc之间
你指的负压是说单路的电压是负的还是差分的电压是负的？
M4的ADC输入脚电压一定要在0~VDDA之间。差分的电压值可以是负的。
