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ADS5474数字输出

Other Parts Discussed in Thread: ADS5474

TI工程师、各位高手:

最近调试ADS5474时发现其输出的14bit(Data13:0)数据中,Data13一直是高电平,这样导致其AD的输入范围只有原来的一半了,是怎么回事了?

空采的情况下也是Data13 为高;手册中提到数字输出是Offset binary data,和这个有关系吗?这个芯片应该怎么用了?

望高手们指导!