Digging deeper into the datasheet for the OPA857 I have additional questions. If you look at Figures 32 & 33, you’ll see a histogram of “Counts” vs. Output Offset Voltage. The problem is what are “Counts”? Is this showing a sampling across a number of production devices? Is Counts really the number of samplings of the Output Offset Voltage on a given part? If so what was the sample rate?