A 10.3GS/s 6bit (5.1 ENOB at Nyquist) time-interleaved/pipelined ADC using open-loop amplifiers and digital calibration in 90nm CMOS

A 10.3GS/s ADC with 5GHz input BW and 6 bit resolution in 90nm CMOS is presented. The architecture is based on an 8 way interleaved/ pipelined ADC using open-loop amplifiers and digital calibration. The measured performance is 5.8 ENOB (36.6dB SNDR) for a 100MHz input signal and 5.1 ENOB (32.4dB SNDR) for a 5GHz input (Nyquist) with phase offset correction across the interleaved array.