Customer is having an odd issue with the INA330,details below.
"I have a thermistor with a nominal value of around 17K (22K at 25 deg. C). The thermistor is implanted inside of a mouse nose, so when the mouse breaths, the temperature fluctuates. This fluctuation is amplified by the circuit. I have chosen an Rg of 220K. V1=V2=1.65V and Vadj = 1.65V nominally. When originally prototyping with this part, we were using an Rset of 14590 by mistake, rather than something around 17K. This was causing a part failure after a few seconds of operation. After three chips, we noticed this mistake and switched to a ~17K resistor for Rset, which seems to have solved the problem, but this will likely cause issues in the future for us, especially when we move to a final PCB. Do you have any insights into why this part failure was happening? PNG of the schematic is attached. Planned revision to the design includes a digital pot for Rset and a DAC for Vadj instead of a voltage divider. Would these help/hurt this particular problem or do you recommend an alternative?
Thank you in advance.