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AD采样值有跳变,但进AD的0~3V信号稳定



用的是28062,此AD用于检测母线电压值,母线电压有时会有10来V的波动,比如说本来是500V,一下子降为490V,然后过一会还会升到500V,检查发现进AD采样值同样有同样的波动,导致了监控电压值的波动,但问题是示波器测量的AD口信号没有任何变化,这种是何原因导致的?或者是不是ADC配置有问题?