基于XTR110的高精度恒流源设计  

Designs of Constant Current Source Based on XTR110

作　　者：徐英[1] 刘新峰[1] 张涛[1] 蒋伟[1] 

机构地区：[1]天津大学电气与自动化工程学院,天津300072

出　　处：《化工自动化及仪表》2015年第1期67-70,共4页Control and Instruments in Chemical Industry

摘　　要：介绍了一种基于XTR110的高精度恒流源设计方案，详细分析了电路的工作原理与公式推导，并以设计0．1％精度的80mA恒流源进行举例说明，对实际电路中元器件的选取进行了说明解释，同时对所设计的80mA恒流源进行测试试验。测试结果表明：该恒流源在工业常用24V供电、负载0-270Ω范围内，输出电流稳定性好，精度可达0．022％，远高于试验要求精度0．1％。A design scheme for high-precision constant-current source was introduced and its working principle and formula derivation were analyzed. Taking 80mA constant-current source which boasting of a 0.1% precision as an example, the element selection in circuit was illustrated. Testing the performance of the 80mA constant current source shows that, powered by 24V power at 0 -270Ω load resistance, the output current has better stability together with 0. 022% accuracy higher than the 0.1% required.

关 键 词：高精度恒流源 XTR110 扩展方案 

分 类 号：TH89[机械工程—仪器科学与技术]