广西师范大学学报（自然科学版） ›› 2022, Vol. 40 ›› Issue (5): 24-35.doi: 10.16088/j.issn.1001-6600.2022022704

• 综述 • 上一篇    下一篇

逐次逼近型模数转换器研究进展

田芮谦, 宋树祥*, 刘振宇, 岑明灿, 蒋品群, 蔡超波   

  1. 广西师范大学 电子工程学院, 广西 桂林 541004
  • 收稿日期:2022-02-27 修回日期:2022-04-27 出版日期:2022-09-25 发布日期:2022-10-18
  • 通讯作者: 宋树祥(1970—), 男, 湖南双峰人, 广西师范大学教授, 博导。E-mail: songshuxiang@gxnu.edu.com
  • 基金资助:
    国家自然科学基金(62061005); 广西研究生教育创新计划项目(YCSW2021070); 广西高校中青年教师科研基础能力提升项目(2020KY02028)

Research Progress of Successive Approximation Register Analog-to-Digital Converter

TIAN Ruiqian, SONG Shuxiang*, LIU Zhenyu, CEN Mingcan, JIANG Pinqun, CAI Chaobo   

  1. School of Electronic Engineering, Guangxi Normal University, Guilin Guangxi 541004, China
  • Received:2022-02-27 Revised:2022-04-27 Online:2022-09-25 Published:2022-10-18

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摘要： 逐次逼近型模数转换器(successive approximation register analog-to-digital converter,SAR ADC)已占据中等速度和精度ADC的主要市场,其采样频率可达5 MHz,分辨率通常为8~16位。在保持其低功耗的固有优势下,SAR ADC设计面临更高速和更高精度的挑战。本文概述近年来逐次逼近型模数转换器的研究现状和先进技术,对电容阵列开关切换技术、比较器和校准方法进行归纳与讨论;对比了结合不同开关策略的电容阵列DAC性能;提出了适用于不同场景的比较器结构;对高速度、高精度、低功耗的SAR ADC研究进行了展望。

关键词: 逐次逼近, 模数转换器, 开关切换技术, 比较器, 校准

Abstract: Successive approximation register analog-to-digital converter (SAR ADC) has dominated the market for moderate speed and accuracy ADCs, with sampling frequency of up to 5 MHz and typical resolutions of 8 to 16 bits. While maintaining its inherent advantage of low power consumption, it faces the challenge of higher speeds and higher accuracy. The research status and advanced technology of successive approximation register analog-to-digital converter in recent years are summarized. Moreover, the sub-modules of capacitor array switching techniques, comparator and the calibration are generalized and discussed. The performance of capacitor array DACs combined with different switching strategies is compared. Comparator structures suitable for different scenarios are proposed. Calibration methods such as redundancy techniques and self-calibration techniques are discussed. Some recommendations are provided for designers to understand successive approximation register analog-to-digital converters.

Key words: successive approximation, A/D converter, switching technology, comparator, calibration

中图分类号: 

  • TN792
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