Hello,
I have an application where my input range is 0-2.5V. I want to keep my supply voltage as low as possible, thus I will use 6V or more to get around the Vs-3.5 input common mode range of the OPA140. However, I have to handle a situation where the input to a sensor may get disconnected; in this case, I need to be able to predict the OPA140's reaction and know that it will recover once re-connected.
During this time, the (+) input would rise to 4.3V (or Vs-1.7). The (-) input would remain <2.5V, thus (+ in) > (- in) and (+ in) > than common mode range, but (- in) within common mode range.
What is the expected response of the OPA140?
I know it has phase reversal protection, so does this just mean it will respond in the predictably positive direction and not necessarily linearly (maybe like a comparator?).
Best regards,
Glen