一种高性能CMOS温度传感器

A High-performance CMOS Temperature Sensor Source

为解决现有CMOS温度传感器Sigma-Delta-ADC方案占用芯片面积较大、响应速度较慢等问题,设计了一种高性能CMOS温度传感器。利用13 bit计数器对压—频转换(V/F)电路的频率进行计数,摒弃传统方案的Sigma-Delta ADC,意味着原本占芯片面积非常大的电容门阵列不复存在。CMOS温度传感器的设计基于CSMC 0.6μm BCD工艺,利用Cadence IC5完成仿真与优化。在3.3 V供电电源下、温度工作范围-40℃～125℃,得到静态工作电流小于200μA,温度分辨率0.08℃,测温精度±0.3℃以及非常高的温度转化频率。

A high performance CMOS temperature sensor is designed to solve the problem of large chip area and slow res-ponse of the existing CMOS temperature sensor Sigma-delta-ADC program.Using a 13-bit counter to count the frequency of a V-F conversion(V/F)circuit,the Sigma-Delta-ADC of the conventional solution is discarded,meaning that capacitance gate arrays,which originally occupied a very large chip area,no longer exist.The CMOS temperature sensor is based on the CSMC 0.6μm BCD process and is emulated and optimized using Cadence IC5.Under 3.3 V power supply and working temperature is-40℃-125℃,the working current is less than 200μA,the temperature resolution is 0.08℃,temperature measurement accuracy is±0.3℃and very high temperature conversion frequency.