Unbalanced supplies to Op-Amp

[Pha5e]

What are the implications of using Op-Amps with unbalanced supplies i.e. V+ at +10V and V- at approximately -9.50V?

The circuit is for a potentiostat and consists of two Op-Amps. One op-Amp is configured in negative feedback mode to generate a fixed reference voltage. The other Op-Amp is configured as a Trans-Impedance-Amplifier to measure the working electrode.

Neither Op-Amp is operating to saturation.

Thanks.

 

[bhaskarbhu]

The off-set voltage should be minimum for good op-amp. when we use two different power supplies then offset voltage increases.

 

[crutschow]

Using different plus and minus supply voltages is the same as changing the common-mode input voltage. Normally an op-amp common-mode rejection is very high so it will have only a very small effect on the op amp characteristics. It is unlikely to affect the (differential) offset voltage.

 

[Borber]

Generally lower supply voltage on a specific rail causes lower maximum output voltage excursion for that rail. So for +10V and -9.5V supply rails maximum undistorted output voltage can be 19Vpp.
This actually depends on type of OPA and its parameters.