基于AD7190的高精度电子秤电路设计  

High precision electronic circuit design based on AD7190

作　　者：秦庆磊[1] 

机构地区：[1]烟台大学文经学院

出　　处：《衡器》2017年第5期36-39,共4页Weighing Instrument

摘　　要：AD7190是一款专门为电子秤、应变计传感器设计的超低噪声24位Σ-ΔADC,可以用较少的外围电路实现两路传感器动态称重。本文主要介绍了在满足复杂的工业环境下,实现高速、高精度采集的AD7190芯片外围电路设计,包括低纹波、大电流的基准源电路、防止EMI干扰的前端滤波电路、防止动态漂移的补偿电路等。通过测试可以实现1kHz采样频率下保持万分之一的精度。AD7190 is a specially designed for electronic scale, strain gauge sensor ultra low noise 242 - A ADC, can use less peripheral circuit to realize two-way dynamic weighing sensor. This article mainly introduced in meet the complicated industrial environment, to achieve high speed, high precision acquisition AD7190 chip peripheral circuit design, including low ripple, large current source of benchmark circuits, to prevent the front end of the EMI interference frlter circuit, prevent dynamic drift compensation circuit, etc. Through test can achieve the accuracy of 1 KHZ sampling frequency to keep one over ten thousand.

关 键 词：AD7190 动态称重 低频滤波 EMI抑制 

分 类 号：TH715.193[机械工程—测试计量技术及仪器]