I'm using two AD8338 in series . I want to control second AD8338's gain using first AD8338's AGC block. For ex: If first AD8338's output is less or greater than the desired voltage , Then second AD8338 minimize the difference between these voltages, not first AD8338. I tried to activate only first AD8338's AGC feature and to tie first AD8338's deto pin to second AD8338's gain pin. But it doesnt work . How can i realize it?
Also I tried to test one AD8338 without AGC. When Gain is greater than 50dB , oscillation occured. What should i do to obtain 50-80dB gain without oscillation?