A High-Performance Interface for Platinum Temperature Sensors with Long-Cable

摘要：

This paper presents a low-cost,highperformance sensor interface for resistive platinum temperature sensors with a long connection cable. The interface design is based on the use of a relaxation oscillator. The effects of interference and parasitic elements are reduced by applying some classical and new measurement techniques in the sensor interface design. The sensor is supplied with a DC excitation signal,which allows the use of a very long cable for the sensor connection. Meanwhile,the advanced chopping technique reduces the effect low-frequency interferences. The sensor interface has been manufactured with 0.7 urn CMOS technology. Experimental results show that the sensor interface is able to measure a resistance in the range of 0 Ω to 200 Ω with a resolution of 3.5 mΩ (0.009 ℃ @ t=0 ℃) and a systematic error of 6.8 mΩ (0.018 ℃ @ t=0 ℃). The measurement time amounts to 110 ms.

作者: Xiujun Li Gerard C.M.Meijer

作者单位: Faculty of Information Technology and Systems,Delft University of Technology Mekelweg 4,2628 CD Delft,The Netherlands

会议类型: 国际会议

会议名称: 9th International Conference on Solid-State and Integrated-Circuit Technology(第9届固态和集成电路国际会议)

会议地点: 北京

会议语种:英文

页码: 1709-1712

在线出版日期: 2008-10-20（万方平台首次上网日期，不代表论文的发表时间）