Just "discovered" the AD2 and am very interested in it. There is a lot of features packed into a small package. One thing seems to be missing and I was wondering why. There is no external analog trigger. If I want to trigger on a specific voltage in a waveform, I have to use one of the two oscilloscope inputs. Why was this left out? Seems like it would be simple to add a comparator and use a DC voltage from the ADC to set the trigger level.