Opamp ouput current VS supply current

crutschow

Joined Mar 14, 2008
27,960
It can provide an output current of 250mA, but from the supply, it is only taking 750uA.
That 750µA is the opamp's quiescent current with no output load.
Since the output load current depends upon the load impedance, it's not shown in the data sheet.
You would add the output current to the quiescent current value to get the total opamp supply current.
 
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