Hi and thank you for your post. The ADC11 does not have any memory within it. However you can sample at a maximum rate of 20kS/s. There are two modes of operation that the ADC11 can operate in ,
Realtime continious - less than or equal to 1KS/s for as long as you want.
Fast Block - Device runs as quick as it can for a very short period of time.
I would recommend reading this knowledge base FAQ:
Hope this helps.