Slew-rate of Op Amps in practice

[NewtonianAlch]

Homework Statement

We have a given op-amp, the data sheet has a specified slew-rate value for it, but in practice it happens to be a lot lower.

I essentially used a step-input to determine the slew-rate and found it to be much lower. I can't remember the exact values now. I think The maximum slew-rate was 1V/us, but I calculated it based on the square wave input (step) to be like 0.4V/us, why would this be?

Thanks

 

[lewando]

What its the slew rate of your step input generator?

 

[rude man]

Slew rate is also a function of circuit configuration, in particular the power supply voltages and output loading, especially if capacitive.