We are using an AD8370 and are having issues with stability - the amplifier tends to go into high frequency oscillation. We have a mini circuits transformer on the input and output for matching. It tends to work ok at low gains (in low gain mode codes of 0 - 85 are typically ok), but in high gain it is unstable for even low gain codes, such as 30.
We have the advised decoupling capacitors etc. Our input is at 5 MHz fed from a transimpedance amplifier with a differential output AD8015. We have followed the layout suggestions .
Can you offer any suggestions? Are their passive components that we can add to improve stability?