摘要
介绍了一种基于0.18μm CMOS工艺的高精度数字式温度传感器电路。在感温前端模块,通过利用动态匹配技术与斩波技术,并采用混合型一阶sigma-delta/SAR型ADC,在降低功耗的同时实现更高的分辨率,提高温度传感器的采样精度。经过仿真及测试验证,提出的基于混合型ADC的高精度数字式温度传感器电路,提供16 bit温度结果,应用时无需校准即可在-25~55℃的温度范围内达到±0.1℃精度。通过使能控制,极大程度地减少自发热对测温精度的影响,在1.7~5.5 V的电压范围内,电流最大值仅为5μA。在达到高精度的同时,降低了成本与功耗。
A high-precision digital temperature sensor circuit based on a O.18μm CMOS process was introduced.In the temperature-sensing front-end module,by adopting dynamic matching technolo-gy and chopper technology,as well as a dopting hybrid first-order sigma-delta/SAR ADCs,the pow-er consumption was reduced,while the higher resolution was achieved and the sampling accuracy of the temperature sensor was improved.After simulation and testing,the high-precision digital tempera-ture sensor circuit based on hybrid ADC presented in this paper provides 16 bit temperature results and achieves±0.1℃accuracy over a temperature range of-25℃to 55℃without calibration.The effect of self-heating on temperature measurement accuracy is greatly reduced by enabling control,and the maximum current is only 5μA over a voltage range of 1.7 V to 5.5 V.While achieving high accuracy,the cost and power consumption are reduced.
作者
黄立朝
张淑慧
章宇新
孔祥艺
HUANG Lichao;ZHANG Shuhui;ZHANG Yuxin;KONG Xiangyi(The 58th Research Institute of China Electronics Technology Group Corporation,Wuri,Jiangsu,214035,CHN;School of Electronic Engineering,Xidian University,Xi'an,710071,CHN)
出处
《固体电子学研究与进展》
CAS
北大核心
2023年第3期253-258,共6页
Research & Progress of SSE
作者简介
联系作者:黄立朝(HUANG Lichao)男,1972年生,陕西渭南人,硕士,高级工程师,现从事模拟集成电路设计研发工作,主要研究方向为精密运算放大器、温度传感器等。E-mail:11560092@qq.com。
