A 100kHz-Bandwidth 98.3dB-SNDR Noise-Shaping SAR ADC with Improved Mismatch Error Shaping and Speed-Up Techniques

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Kazunori Hasebe, Shinichirou Etou, Daisuke Miyazaki, Taiki Iguchi, Yuki Yagishita, Mika Takasaki, Takeru Nogamida, Hiroyuki Watanabe, Tomohiro Matsumoto, Yasushi Katayama

Published: 01 Jan 2022, Last Modified: 28 May 2024VLSI Technology and Circuits 2022EveryoneRevisionsBibTeXCC BY-SA 4.0
Abstract: Noise-Shaping (NS) SAR ADCs can have high Dynamic Range (DR) and be easily adopted to IoT, audio and many other applications. This paper proposes four techniques to improve the DR and conversion speed of NS SAR ADCs. A prototype NS SAR ADC achieves SNDR/SNR/SFDR of 98.3dB/99.3dB/108.5dB with 100kHz bandwidth and 12.8MS/s. Schreier FoM reaches 175.3dB.