A 2.5 V 10 b 120 MSample/s CMOS pipelined ADC with high SFDR

Abstract

A 10 b multibit-per-stage pipelined ADC incorporating the merged-capacitor switching (MCS) technique achieves better than 53 dB SNDR at 120 MSample/s and 54 dB SNDR and 68 dB SFDR for input frequencies up to Nyquist at 100 MSample/s. The measured DNL and INL are /spl plusmn/0.40 LSB and /spl plusmn/0.48 LSB, respectively. The ADC fabricated in a 0.25 /spl mu/m CMOS process, occupies 3.6 mm/sup 2/ active die area and consumes 208 mW under a 2.5 V power supply.