一种高精度集成运放电路的测试方法研究  

The Investigation of the Testing Method for High-Accuracy Integrated Operational Amplifier

作　　者：韩先虎 张磊 Han Xian-hu;Zhang Lei(China Electronics Technology Group Corp,No.58 Research Institute,Jiangsu Wuxi 214035)

机构地区：[1]中国电子科技集团公司第五十八研究所检测事业部,江苏无锡214035 [2]中国电子科技集团公司第五十八研究所,江苏无锡214035

出　　处：《电子质量》2020年第11期153-155,共3页Electronics Quality

摘　　要：集成运放的输入失调电压与输入失调电流对其性能有着较为重要的影响。传统的模拟测试设备配备的运放环路板卡由于板卡费用较为昂贵且内部器件已固定,在多种器件的测试实现上有局限性。为实现运放环路板卡的多种机台适用性和降低测试成本,研究了基于T861测试系统的高精度集成运放电路的测试方法。以LF41X型集成运放电路为例,利用外围辅助运放方法设计了基于T861测试系统的集成运放测试方案,实现了集成运放输入失调电压与输入失调电流的测试方案。通过使用JC5600机台自带的运放环路板和基于T861测试的运放环路板分别对LF41X电路的输入失调电压参数和输入失调电流参数进行测试并将其实测值进行对比,两者结果一致性较好。实验结果表明基于T861测试机台的辅助运放测试方法测试集成运放输入失调电压与输入失调电流的方案具有较高的测量精度,能够满足LF41X电路的相应参数测试需求。The input offset voltage and input offset current of an integrated op amp has a significant effect on its performance.The traditional analog test equipment with op amp loop board is expensive and the internal components have been fixed.Therefore,there are limitations in testing various devices.In order to realize the applicability the op amp loop board for multiple machines and reduce the test cost,the test method for the high precision integrated op amp circuit based on the T861 test system is studied.Taking the LF41X integrated operational amplifier circuit as an example,using the peripheral auxiliary operational amplifier to design an integrated operational amplifier test scheme based on the T861 test system,the input offset voltage and input offset current testing method of the integrated operational amplifier is realized.The input offset voltage parameters and input offset current parameters of the LF41X circuit were tested based on the T861 test system.Aslo we compared the expeimental results with the JC5600 machine which equipped with the op amp loop board.The two results were basically consistent.The experimental results show that the auxiliary op amp test method based on the T861 test machine can test the input offset voltage and input offset current of an integrated op amp.And it has high measurement accuracy and can meet the needs of LF41X circuit the input offset voltage and input offset current test.

关 键 词：输入失调电流 输入失调电压 T861 集成运放 

分 类 号：TN407[电子电信—微电子学与固体电子学] TN722