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ADS8867的spi无输出

Other Parts Discussed in Thread: ADS8867

ADS8867的spi无输出,spi主机为dsp2812发送伪数据,但是接受不到数据,示波器测试ADS8867的spi的输出为3.3v直线。ADS8867连接为3线模式。是什么原因呢?有相关经验的支支招啊。zbq666@126.com.

谢谢回复。问题已经解决。是电源的问题。原设计采用运放为AD供电,采用专用ldo即可。