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It can drive 10nF and it will not oscillate in most cases. To drive more than 10nF it's probable that you'll need to add a compensating capacitor to avoid oscillation.
Well, not exactly ..
To drive a capacitive load means that the output will source or sink enough current to charge or discharge this capacitance in a short period of time to mantain the claimed Slew-rate (V/µs) ..
Regards,
IanP
That makes sense as the text of the op amp mentioned that higher loads would reduce the available bandwidth, didn't click in my mind at the time, thanks.
Also real quick, do you know how to derate an op amp's frequency based on that capacitance rateing? The one opamp I was looking at didn't have good parametric data, I'll look it up if need be but I was wondering if there's some simple equation that lets you figure it as percent of load vs percent of possible bandwidth.
Why when we drive the big cap, we get oscillation? I think with big cap, we actually move the pole toward the origin, so the opamp should be more stable.
Why when we drive the big cap, we get oscillation? I think with big cap, we actually move the pole toward the origin, so the opamp should be more stable.
Because the pole moved to the orgin by the big load cap is not the main pole of the opamp. This would result in that there are two pole too close to the orgin and oscilation of the opamp will happen.
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