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ADS1271的DRDY信号不输出的问题

Other Parts Discussed in Thread: ADS1271, OPA1632

一个项目中用到ADS1271,发现该AD经常会有出现不输出DRDY信号的现象,量电压5V和3.3V均正常,量基准2.5V正常,27MHz主时钟正常,但DRDY信号就是不变低(所有损坏均为放大器OPA1632输入端接地,AD输入端为2.5V共模电压)。

我们采购说100%肯定是买的原装正品,目前用过40来片了,但坏的都已经超过8片了,只能通过更换AD解决。

请问TI原厂的技术支持,这种现象是什么原因?