A 6.3μW 20b Incremental Zoom-ADC with 6ppm INL and 1μV Offset

📋 论文概要

该论文提出了一种6.3μW功耗、20位分辨率的增量Zoom-ADC，通过结合SAR和ΔΣ调制器架构实现了6ppm的积分非线性（INL）和1μV的失调电压，解决了高精度仪器应用中低功耗与高线性度之间的矛盾。

💡 主要创新点

• 采用Zoom-ADC架构，结合SAR粗量化和ΔΣ细量化，在低功耗下实现20位高分辨率。
• 通过动态元件匹配和斩波技术，有效抑制1/f噪声和失调，达到1μV失调和6ppm INL。

🏷 关键词

📄 原文摘要

Delft University of Technology, Delft, The Netherlands 1 2 Incremental analog-to-digital converters (ADCs) can be applied in many instrumentation applications, such as the readout of bridge transducers and smart sensors [1-4]. Such applications require ADCs with high absolute accuracy and linearity, as well as high resolution. Moreover, since the signals of interest are typically near DC, such ADCs must employ robust offset and 1/f noise-reduction techniques. Fulfilling these requirements often results in ADCs with poor energy efficiency, thus preventing their use in systems powered by batteries or energy scavengers. This paper describes a micro-power incremental ADC that achieves 20b resolution, 1μV offset and 6ppm INL, while dissipating more than an order of magnitude less energy than ADCs with comparable precision [3-6]. This is achieved by the use of a 2-step or zoom ADC architecture [1,2], an inverterbased integrator, and various dynamic error-correction techniques.

👥 作者与机构

Youngcheol Chae1, Kamran Souri2, Kofi A.A. Makinwa2

Yonsei University, Seoul, Korea,