A 10-bit 80-MS/s opamp-sharing pipelined ADC with a switch-embedded dual-input MDAC

摘要

A 10-bit 80-MS/s opamp-sharing pipelined ADC is implemented in a 0.18-μm CMOS. An opampsharing MDAC with a switch-embedded dual-input opamp is proposed to eliminate the non-resetting and successive-stage crosstalk problems observed in the conventional opamp-sharing technique. The ADC achieves a peak SNDR of 60.1 dB (ENOB = 9.69 bits) and a peak SFDR of 76 dB, while maintaining more than 9.6 ENOB for the full Nyquist input bandwidth. The core area of the ADC is 1.1 mm~2 and the chip consumes 28 mW with a 1.8 V power supply.