Provided is a multi-bit pipeline analog-to-digital converter (ADC) having
a merged capacitor switching structure. In a multiplying
digital-to-analog converter (MDAC) used in the multi-bit pipeline ADC,
switches are connected between the bottom plates of respective
differential capacitors, thereby constantly maintaining a uniform input
common mode voltage regardless of an input digital code. Thus, it is
possible to improve the operating speed and performance of the MDAC.