Analogue-to-digital converter (ADC) is a very important circuit element to convert analogue signal into digital signal for information processing. There are several designs to implement ADC. The precision of an ADC depends on its resolution. In this work, this group has shown the design of eight-bit ADC using quantum dot gate non-volatile memory (QDNVM). The controllable threshold voltage of QDNVM is very useful to design comparators which are the main component of this ADC circuit. This work shows the use of QDNVM in eight-bit ADC design.