The REFOUT voltage of AD5420 is rarely abnormal. The abnormal voltage values are as high as 5.05V~5.07V. 4 out of 500 units mounted have the abnormality.
What are the possible causes of the high REF voltage?
Attached is the circuit for AD5420, REFOUT voltage is used for Vref of an AD converter on the same board. AVDD is 24V and DVDD is not used.
When the AD5420s with high REFOUT were removed and other AD5420s were installed, REFOUT showed normal value.
Please support this case.