This course surveys structure and operation of analog-to-digital converters (ADCs) implemented on digital readout integrated circuits (ROICs) and digital image sensors. Attendees will learn how to evaluate ADC architectures using basic figures of merit for use in different sensor formats. We will cover a wide range of cutting edge architectures and see published examples without delving into transistor level theory. We will survey both academia and industrial ADC architectures. From this survey attendees will discover the industrial design evolution convergence down to a few workhorse architectures and what lessons it imparts to the image sensor community. If you are interested in the digital ROIC revolution or if you ever interface with designers or evaluate digital ROIC proposals, then you will benefit from taking this course.