Below is video tutorial about ADC architecture. This video discuss about the advantage and disadvantage of 3 ADC architecture. First is the approximation ADC. This ADC is widely used for medium resolution and medium speed.
The second architecture is used for extremely high resolution . They are curerntly used in application like measurement, voice band, and radio. Finally, the third architecture is pipe line ADC. This pipe line ADC is the most commonly used for high speed. Watch the video for further information.