We are using an AD5312 that works flawlessly. It outputs the analog values we are looking for and all of the control signals look good. The problem we are experiencing is that occasionally during electrical noise it locks up and begin to Output 3 volts. After this we cannot write to it at all. All of the control signals to it are confirmed to beper spec when it is locked up and they do nothing. This seems to happen even if we are not in the process of writing to the DAC when the noise occurs. Has anyone seen this happen ? We have tried everything we can to reset the DAC by software but we don't have Micro control over the DAC power pin. Is there any ODD way to reset the DAC ?