A 280μW Dynamic-Zoom ADC with 120dB DR and 118dB SNDR in 1kHz BW

📋 论文概要

本文提出了一种动态缩放ADC，通过结合粗量化和细量化实现高动态范围，在1kHz带宽内达到120dB DR和118dB SNDR，功耗仅280μW，解决了微功耗ADC在低带宽应用中动态范围受限的问题。

💡 主要创新点

• 提出动态缩放技术，通过两级量化（粗量化和细量化）实现高动态范围，同时保持低功耗。
• 采用噪声整形和增量转换架构，有效抑制低频噪声和偏移，提升信噪比。
• 在280μW功耗下实现120dB DR和118dB SNDR，显著优于传统噪声整形SAR和增量ADC。

🏷 关键词

📄 原文摘要

Robert Van Veldhoven2, Kofi A. A. Makinwa1 Delft University of Technology, Delft, The Netherlands NXP Semiconductors, Eindhoven, The Netherlands 1 2 Micro-power ADCs with high linearity and dynamic range (DR) are required in several applications, such as smart sensors, biomedical imaging, and portable instrumentation. Since the signals of interest are then often small (tens of μV) and slow (<1kHz BW), such ADCs should also exhibit low offset and flicker noise. Noise-shaping SAR [1] and incremental ADCs [2] have been proposed for such applications, but their DR is limited to about 100dB. Although the ΔΣ modulator (ΔΣM) proposed in [3] achieves 136dB DR, it is at the expense of high power consumption (12.7mW). The incremental zoom ADC proposed in [4] combines a coarse SAR ADC and a fine ΔΣ ADC to efficiently achieve 119.8dB DR, but is limited to DC signals. The dynamic zoom ADC in [5] solves this problem, but

👥 作者与机构

Shoubhik Karmakar1, Burak Gönen1, Fabio Sebastiano1,