A 12-Bit 32 /spl mu/W Ratio-Independent Algorithmic ADC

Abstract

This paper describes a ratio-independent algorithmic ADC architecture that requires a single differential amplifier and a comparator. The prototype 12-bit, 41.67 kS/s ADC with an active die area of 0.055 mm2 is implemented in a 0.13mum CMOS. The power dissipation is minimized using a dynamically biased operational amplifier. With a 32 muW power dissipation, the ADC achieves 80 dB SFDR and 60 dB SNDR, resulting in a power FOM of 0.9 pJ/conversion