Hello,
I am using INA117KU to sense a current going to my DC motor on the high side. The max. voltage across the motor is +/-36vdc (travels in both directions). The sense resistor is 0.1 Ohm. I have no other resistors in line with the input pins of INA117. I have experienced failures of INA117 on three occasions. One of the things to mention is that I am powering INA117 with +/-12Vdc. I do know that the specs on CM will not be +/-200V and it will decrease but not sure by how much. I am wondering if the inputs could be protected somehow. I have seen some samples with isolated pre-op amps but that I can’t do due to the space requirement.
Any ideas?
Thanks
Peter V.