A 3.7mW 11b 1GS/s Time- Interleaved SAR ADC with Robust One-Stage Correlation-Based Background Timing-Skew Calibration

This work proposes a one-stage correlation-based background timing-skew calibration method. It detects timing-skew errors of all channels simultaneously and relaxes the input bandwidth limitation up to the Nyquist frequency, ensuring fast and robust convergence. It enables an 11b 1GS/s 4-channel time-interleaved SAR ADC that achieves the best FoMS of 170.6dB and FoMW of 4.9fJ/conv-step among all reported ADCs with f(s)>600MS/s.