A 0.55 V 7-bit 160 MS/s Interpolated Pipeline ADC Using Dynamic Amplifiers

This paper presents a 0.55 V, 7-bit, 160 MS/s pipeline ADC using dynamic amplifiers. In this ADC, dynamic amplifiers with a common-mode detection technique are used as residual amplifiers to increase its robustness against supply voltage lowering. These amplifiers also remove the unnecessary static power consumption achieving clock-scalability in power performance. The 7-bit prototype ADC fabricated in 90 nm CMOS demonstrates an ENOB of 6.0 bits at a conversion rate of 160 MS/s with an input close to the Nyquist frequency. At this conversion rate, it consumes 2.43 mW from a 0.55 V supply. The resulting FoM is 240 fJ/c.-s.