My customer is using the DAC38J84IAAV and am seeing, on occasion, errors in the DAC outputs. They are using DACA and DACD, not DACB or DACC (they have grounded the outputs of DACB and DACC). (1) Is it a problem if DACB and DACC are not in sleep mode whilst their outputs are grounded? (2)they inadvertently driving RESETB high with 3.3V - would this cause a problem? (3) Is RESETB level or edge triggered? Any assistance would be much appreciated?