The operating voltage of the AD8137 is specified as 12V max in the datasheet. This is also the voltage at which we operate it. Looking again into the datasheet, I found that this is identical to the absolute maximum rating. This might be exceeded in our circuit by 170mV due to tolerances in the voltage supply.
Now I am concerned if we should modify the PCBs in order to meet the maximum rating. This would mean some effort, because the PCBs are already installed in a setup.