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DAC9881零电位常温漂移

Other Parts Discussed in Thread: DAC9881, DAC91001

DAC9881在常温下数字输入00000H时,模拟端输出一直有5mV电压值。

其他数字量输入情况下,模拟输出范围5mV-VREF(2.5V)均正常没有漂移,偏差在1mV以内。

原理图如下,确认模拟地和数字地单点连接且没有压差,请TI专家指导,谢谢。

论坛上找到非常相似的问题但是没有解决,e2echina.ti.com/.../114504