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ADS1232 开机时AD值会死

Other Parts Discussed in Thread: ADS1232

在使用ADS1232的时候,DVDD的电压正好掉到0V的时候,马上通电,ADS1232会不能正常工作,AD值会死。无论怎么对它操作都没有任何反应。而且必须要等DVDD掉到0V后,延迟10-20ms之后再通电,ADS1232才能正常工作;

ADS1232不会有这样的缺陷吧,请大神帮忙给我看看;附件为AD死DVDD 跟AVDD的波形,黄色为DVDD(3.3V),蓝色为AVDD(5V);

以下是原理图: