A 7-to-10b 0-to-4MS/s Flexible SAR ADC with 6.5-to-16fJ/conversion-step

📋 论文概要

本文提出了一种灵活分辨率和采样率的SAR ADC，可在7到10位分辨率以及0到4MS/s采样率范围内工作，并实现了6.5至16fJ/转换步的高能效。解决了传感器应用中不同精度和带宽需求下的功耗优化问题。

💡 主要创新点

• 实现了分辨率和采样率的双重可扩展性，而传统设计通常只针对固定精度或单一采样率范围。
• 在保持高能效的同时提供灵活性，功率效率（6.5-16fJ/conversion-step）优于以往的可变分辨率ADC。

🏷 关键词

📄 原文摘要

However, each application has different requirements for accuracy and bandwidth. Recent power-efficient ADCs for sensor applications are mostly designed for a fixed accuracy and a limited range of sample rates [1,2]. An efficiently scalable sample rate (10kS/s to 10MS/s) has been demonstrated before [3], but without scalability of resolution. In [4], an ADC with both flexible resolution and sample rate is reported; however, its power efficiency is not as good as the point-solutions in [1,2]. This paper describes a SAR ADC that achieves both good power efficiency (6.5-to-16fJ/conversion-step) and a wide range of flexibility (7-to-10b resolution, sample rates up to 4MS/s) to cover a large variety of applications,

👥 作者与机构

Pieter Harpe1,2, Yan Zhang1, Guido Dolmans1, Kathleen Philips1, Harmke De Groot1

Holst Centre / imec, Eindhoven, The Netherlands Eindhoven University of Technology, Eindhoven, The Netherlands 1 2 Applications like wireless sensor nodes require ultra-low-power ADCs