摘 要：為解決傳統的高精度A/D測量電路中需要在A/D前端搭建多級放大器而帶來的成本及檢測過程中的漂移問題，采用24 位超低噪聲模數轉換器 ADS1232，并在設計過程中使用了多種單片機抗干擾措施，設計出來的高精度測試儀器在硬件和軟件上都得到了簡化，該系統可以得到一個可靠的高精度的測量結果，解決了橋接傳感器的前端問題。實踐表明，該系統工作穩定，性能良好。
關鍵詞：ADS1232轉換器；橋式傳感器；高精度；測試；抗干擾
中圖分類號：TP274；TP319 文獻標識碼：A
文章編號：1672-4984（2008）03-0138-03
High-precision testing technology based on ADS1232
JIANG Ling-bin1， LIU Si-song1， DANG Zheng-qiang2
（1.College of Nuclear Technology and Automation Engineering，Chengdu University of Technology，Chengdu 610059，China；
2.National Institute of Measurement and Testing Technology，Chengdu 610021，China）
Abstract： In order to overcome the problems including high cost and drift, caused by the multi-stage amplifiers constructed in the front-end of the Analogy-to-Digital（A/D） in the traditional high precision A/D test circuit, a high-precision testing instrument used 24-bit analog-to-digital converter, a low-noise programmable gain amplifier （PGA）, ADS1232 and many anti-interaction techniques of Microchip Controller Unit（MCU） were designed. It simplified both in hardware and software, and it could give reliable and high-precision measurement results. Also, it provided complete front-end for bridge sensor applications. All practical results show this system performance well and stably.
Key words： ADS1232; Bridge sensor; High-precision; Test;
Editor：liyan
