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ads1256 受到干扰后复位

Other Parts Discussed in Thread: ADS1256

用ads1256芯片采集数据,发现在插拔220v电源时有时会产生火花,这时候发现数据采集输出值异常(1是采集电压不对,2是数据采样率变快),感觉是芯片复位了,因为初始化设置的sps为25。在模拟输入端增加了BAT54S保护,但效果不明显。spi数字端和arm主板之间电源隔离,信号采用adum2402隔离。如何排除这种干扰?