Do you have any data of AD8553 about recovery time of output signal as for the following situation? Any conditions are OK as for VCC, Gain and Filter. It is for reference. If you have data undfer some conditions, the same condition of datasheet is better.
-under stable condition after power-on;
-either input pin is opened
-output signal will be same as VCC or GND
-then the input pin is became normal condition
How long is recovery time of output signal in this case? We don't need the data if it is 1 msec or less.