OPA695: Output over range recovery time

Hello Hiroshi,

Little hard to follow what you are describing, but - anything that causes the loop to open up transiently gets into an unspecified recovery time and settling to final value. those include,

1. if you slew limit on the transition, that opens the loop and you will a non-linear recovery time - not specified
2. if your output overshoot goes into the max output swing range, the loop will open and the non-linear recovery time is not specified

That Figure23 was mainly intended to show there was no phase reversal on overdrive - not specifically how fast it comes out of overdrive,

And note your gain of 2.5 will have varying response shapes and its own overshoot depending on the Rf value.

A TINA file and input waveform would help.

Hi Hiroshi,

figure 23 and 24 show the overdrive recovery behaviour at a gain of +8 and -8. At a gain of 2.5, on the other hand, the overdrive recovery might look a bit different. So, I would do own measurements.

Kai

Hi, Michael, Kai,

Thank you for your reply.
I also try with Tina and the evaluation board.

Best regards,
Hiroshi

TINA will not model overdrive recovery time - again, that is normally maybe a typ only spec with no guarantees - years ago we tried to provide a spec, but it varied a lot by external circuit and part to part - if you need a more defined clipping and recovery operation, look at the OPA688

Hi Hiroshi,

TINA might not properly simulate the overdrive recovery performance of OPA695, as spice models are rather limited when it comes to untypical operating conditions.

Kai