Other Parts Discussed in Thread: OPA2348-Q1,
Hello TI Team,
I am using both of the above op amps (OPA4322-Q1 and OPA2348-Q1). When these op-amps are off ( It is possible that (+) input voltage can go up to 16V through a 49.9k resistor.
This leads to the following questions:
1. I wanted to prevent backfeeding when the op-amp is off and reduce overall quiescent current. Note that the voltage divider circuitry is always hot. Therefore I have the MOSFETs and diode to cutoff the current flow when the op-amp is off. The (+) input voltage will go up to 16V however I don't believe this will damage the parts as I have large input impedance (49.9k) to reduce the input current to the OP-AMP. Please confirm.
2. When the OP-AMP is off (V+ and V- are disconnected) will the output voltage go up to VBATT level? Or will it hold to 0V?
Robert Liu