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ads1274有丢码现象

Other Parts Discussed in Thread: ADS1274

我最近用了ads1274做压力传感器采样,用了两路,高精度模式,基于SPI的discrete模式,clk为5MHz,sclk为2.5MHz,SPS试过1k,500Hz,发现数据有丢码,很频繁,丢码后的数据接近于零电压输入,我输入了1hz正弦波,发现丢码后的数据接近于零输入,且组成了一个与输入正弦波同频的正弦波,只是幅值减小了一个比例,不知各位专家有过类似情况吗?不知是否我的采样率过高了?TI的专家能回答吗?非常谢谢!