A 0.0035mm <sup>2</sup> 86dB-SNR 1.25MHz-BW Noise-Shaping SAR ADC Enabling kT/C Noise Shaping
This paper proposes a 13-bit 2nd-order noise-shaping SAR (NS-SAR) ADC with a novel kT/C noise shaping technique. It achieves 85.8dB SNDR with a 40MHz sampling rate and an oversampling ratio (OSR) of 16. Its input sampling capacitance is merely 0.3 pF, occupying an area of 0.0035 mm<sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> in a 28nm CMOS technology. It is the smallest among all published ADCs exceeding 70dB SNDR.
Authors
- Lu Jie (ORCID: https://orcid.org/0000-0001-5046-3917)
- Yi Zhong (ORCID: https://orcid.org/0000-0002-7927-5976)
- Nan Sun (ORCID: https://orcid.org/0000-0002-5536-8385)
- Xing Wang (ORCID: https://orcid.org/0000-0001-9930-3287)
- Zhishuai Zhang (ORCID: https://orcid.org/0009-0006-0383-4811)
Institutions
- Tsinghua University (CN)
Publication Details
- Published
- 2025-06-08
- DOI
- https://doi.org/10.23919/vlsitechnologyandcir65189.2025.11075144
- Primary Topic
- Analog and Mixed-Signal Circuit Design
- Type
- article
- Field-Weighted Citation Impact
- 0.00