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ADS5407 直流校准没有作用

Other Parts Discussed in Thread: ADS5407

采样率400msps,被测信号251M,252M,使能校准功能,ads5407采集数据后有几个通道有很大的杂散,关闭校准后个别通道杂散消失,使用matlab统计ADC输出的数据,发现是内部交织采样的直流不一致造成的,在外部人工去除直流后正常,但是由于直流偏差和温度相关,比较难以实现,内部直流校准没有起到应有的作用,寄存器配置按照手册推荐的初始化流程进行,请问是哪里还有问题,是不是手册的寄存器有问题?

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