中圖分類號(hào)： TN911.71
文獻(xiàn)標(biāo)識(shí)碼： A
DOI：10.16157/j.issn.0258-7998.200979
中文引用格式： 李建翔，楊玉華，劉東海，等. 多通道SAR型數(shù)字變換器的設(shè)計(jì)與實(shí)現(xiàn)[J].電子技術(shù)應(yīng)用，2021，47(6)：105-109，114.
英文引用格式： Li Jianxiang，Yang Yuhua，Liu Donghai，et al. Design and analysis of multi-channel SAR digital converter[J]. Application of Electronic Technique，2021，47(6)：105-109，114.

Design and analysis of multi-channel SAR digital converter

Abstract： In this paper, a high-reliability and high-precision analog-to-digital conversion scheme is proposed for the design of a multi-channel digital converter in a project. In order to complete the collection of 12 channels of sensor signal and the collection of 4 channels of voltage and current, the hardware circuit is analyzed and optimized in detail. The signal to be collected is processed by signal conditioning, analog switch, voltage division follow-up and anti-aliasing filtering, and the establishment time of the link is analyzed. Finally, the successive approximation AD chip is used for conversion. Verification of data collection accuracy through cooperation with the host computer.After a lot of experimental data verification, the collection accuracy can be better than 0.5%, meeting the task requirements.

Key words : analog-to-digital conversion；high precision acquisition；signal conditioning；analog switch；anti-aliasing filtering