A CMOS 4-bit MDAC with self-calibrated 14-bit linearity for high-resolution pipelined A/D converters

Abstract

This paper presents an integrated 4-bit MDAC for highspeed high-resolution pipelined ADCs which employs a code-by-code analogue self-calibration technique. Measured results from the prototypes fabricated in a 1.0 /spl mu/m CMOS technology show that the proposed self-calibration technique corrects the MDAC linearity and the interstage gain to the 14-bit level, while allowing conversion rates in the MHz range.