I am just starting to test out AD8338 as an amplifier with automatic gain control. I want the gain to change relatively fast, like within 100us of seeing a large input signal. Initially I tried 1nF and it was turning down the gain within about 500us, so I thought I would try 220pF. But then the DETO output would oscillate. I wonder if anyone knows what is the minimum capacitance you can use for setting the response time of the AGC?