A High-Precision CMOS Temperature Sensor with Thermistor Linear Calibration in the (−5 °C, 120 °C) Temperature Range

Sensors

Zong-You Hou¹  Chua-Chin Wang¹  Jhih-Cheng You¹ 

[1]Department of Electrical Engineering, National Sun Yat-sen University, Kaohsiung 80424, Taiwan

关键词: thermistor;    temperature variation;    sensitivity;    linear calibration;   

DOI  :  10.3390/s18072165

来源: DOAJ

【 摘 要 】

A high-precision Complementary Metal-Oxide-Semiconductor (CMOS) temperature sensor for (−5 °C, 120 °C) temperature range is designed and analyzed in this investigation. The proposed design is featured with a temperature range selection circuit so that the thermistor linear circuit automatically switches to a corresponding calibration loop in light of the temperature range besides the analysis of the calibration method. It resolves the problem that the temperature range of a single thermistor temperature sensor is too small. Notably, the output of the proposed design also attains a high linearity. The measurement results in a thermal chamber justifying that the output voltage is 1.96 V to 4.15 V, the maximum linearity error ≤1.4%, and the worst temperature error ≤1.1 °C in the temperature range of −5 °C to 120 °C.

【 授权许可】

Unknown