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ADS1230 ,输出开始时稳定一段时间,随后开始减小,并且减小越来越快

Other Parts Discussed in Thread: ADS1230

如题,开始上电,ADS1230输入端输入稳定的毫伏信号,输出显示正确无跳变,维持这个输入信号不变,随着时间推移,输出显示开始变化,并且变化越来越快,最后减小到接近零。测输入端的毫伏信号没有变化,而cap两端由几百毫伏变成了接近零。请问这是输入电路有问题,还是芯片损坏了,望解答