how to measure quiescent current of an OPAMP?

[dilip4023]

how to measure quiescent current

Kindly let me know how to measure quiescent current of an OPAMP?

In which configuration OPAMP should be configured to measure quiescent current? (inv/noninv)

Should all the inputs be grounded and the output infinite load?

If it is a QUAD package then do we need connect the individual OPAMPs or all four together to determine the quiescent current?

Your help will be highly appreciated.

Thank you!

Dilip Kumar

 

[VVV]

measure quiescent current

The configuration does not matter, it can bei either.
Make sure the loads are infinite. The inputs can be grounded, if the inputs are allowed to go to GND. Else, bias them properly.

 

[FvM]

how to measure queiscent

To my opinion, for a nominal condition measurement, the output should be in active operation range and the input voltage at mid-supply. It doesn't matter with most OPs, but for some devices, the quiscent current may depend on common mode and output voltage. A non-inverting buffer would be a simple test configuration (for an unity gain compensated OP).