A 4x Time Interleaved SAR ADC with Common-Mode Injecting Skew-Detection Method
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This paper proposes a 4-channel time-interleaved successive approximation register analog to digital converter (TI-SAR ADC). The proposed TI-SAR ADC adopts a commonmode injection technique to achieve efficient skew detection. In addition, by employing a switched-capacitor integrator operating at a lower speed than the ADC sampling rate, lowpower, background skew detection is realized. The proposed ADC achieves an SNDR of 61.3 dB at a sampling rate of 800 MS/s, while consuming 5.58mW of power and achieving a FoMw of 7.73 fJ/conv-step.
Abstract
This paper proposes a 4-channel time-interleaved successive approximation register analog to digital converter (TI-SAR ADC). The proposed TI-SAR ADC adopts a commonmode injection technique to achieve efficient skew detection. In addition, by employing a switched-capacitor integrator operating at a lower speed than the ADC sampling rate, lowpower, background skew detection is realized. The proposed ADC achieves an SNDR of 61.3 dB at a sampling rate of 800 MS/s, while consuming 5.58mW of power and achieving a FoMw of 7.73 fJ/conv-step.