Is an op amp or comparator how to apply supply voltage sequence?
It is necessary that the IC(op amp, comparator) is always used in the condition of no floting V-(GND) terminal. Therefore, it is necessary to be noted on using the dual power supply as follows.
- When the power turns on, V- power supply should be turned on before or just same with the V+ power supply.
- When the power turns off, V+power supply should be turned off before or just same with the V- power supply.
Here are shown example of Power On/Off Sequence to Figure 1 and Figure 2.
Figure1 Power On Sequence
Figure2 Power Off Sequence