A 78.5dB-SNDR Radiation- and Metastability-Tolerant Two-Step Split SAR ADC Operating up to 75MS/s with 24.9mW Power Consumption in 65nm CMOS

📋 论文概要

该论文提出了一种用于医疗、航空和高能物理应用的高分辨率低功耗辐射容忍ADC，采用两步分裂SAR结构。它解决了在辐射环境下实现高SNDR（78.5dB）、高速（75MS/s）和低功耗（24.9mW）的挑战，并具有亚稳态容忍能力。

💡 主要创新点

• 提出两步分裂SAR ADC架构，结合辐射容忍设计实现抗辐射性能，同时保持高线性度和速度。
• 通过优化比较器和逻辑电路，实现了对亚稳态的容忍，避免数据错误。
• 在75MS/s采样率下达到78.5dB SNDR，功耗仅24.9mW，满足ATLAS探测器等极端环境需求。

🏷 关键词

📄 原文摘要

Irvine, CA 4 Southern Methodist University, Dallas, TX 1 2 High-resolution, low-power radiation-tolerant ADCs are under great demand from medical, aerospace and high-energy physics applications. In the ATLAS Liquid Argon Calorimeter of the LHC experiment at CERN, the radiation operation condition coupled with the large dynamic range (>12b ENOB), 40-80MS/s sample rate and low power (for cooling system requirement) specs [1] make the design of such ADCs a very challenging task. Figure 28.6.1 shows the block diagram of the split SAR ADC that meets the above requirements. Each sub-ADC employs a 10b+8b two-step pipelined-SAR architecture with 2b inter-stage redundancy and 1b sub-binary redundancy within each stage. By taking advantage of the system-level redundancy embedded in the

👥 作者与机构

Hongda Xu1, Yongda Cai1, Ling Du2, Yuan Zhou3, Benwei Xu1,

Datao Gong4, Jingbo Ye4, Yun Chiu1 University of Texas at Dallas, Richardson, TX University of Electronic Science and Technology of China, Chengdu, China 3 Broadcom,