[PStamler]

On Thursday, February 14, 2013 5:39:26 AM UTC-6, wrote:
Agreed that there are plenty of good choices out there with slew-rate to spare. It's a good idea to over-design the slew-rate, because the performance of most op-amps begins to degrade as you approach the hard slew-rate limit. This occurs because the gain of the input stage shows some soft clipping behavior and therefore the loop gain is dynamically lowered during a high-slope input event that almost but not quite hits the limit. This shows up in the the+n versus frequency plot on the data sheet. I wouldn't call this a major factor and its audibility is questionable, but its common practice in the design world to over-specify slew-rate compared with the simple 2*PI*A*F calculation.


And with many high-quality opamps available, it has become quite easy to over-spec the slew rate.

Peace,
Paul