Hi Jeff, Thank you for your query. The failure could be because of the power supplies as you have pointed out. There is no explicit power supply sequencing requirement for this device as such. However, the ABS max table specifies that the difference between AVDD and DVDD should be less than +/-2.8V. When there is a gap between these two supplies of 4ms, there is a possibility that this limit was violated. This might have damages the devices. Please also look at the reference voltages. They should not be on before AVDD as per the ABS max table. This could be another suspect that might result in device damage. Hope that helps debug the issue. Please let us know if there is any new finding. Regards, Uttam Sahu Applications Engineer, Precision DACs
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