Hi Nick123,
We regret to say that we do not have ADC parts that have an internal FIFO (capture buffer). ADI have never created a device with such a function.
Anyway, can I ask why are you interested to an ADC with an internal FIFO? I'm assuming that you do not want the processor being interrupted by the ADC continuously, is this the case? If so, in what particular application do you intend to use this type of device?
Apology for the delay in replying to your query.
Regards,
Johnny