A CMOS temperature sensor with calibration function using band gap voltage reference

Author

Han, Dong-Ok ; Kwon, Yong-II ; Park, Tah-Joon ; Park, Heon-Chul

Author_Institution

Vehicle Solution, Ubiquitous Convergence, Gyunggi-Do

fYear

2008

fDate

Nov. 30 2008-Dec. 3 2008

Firstpage

496

Lastpage

499

Abstract

In this paper, an accurate temperature sensor was implemented using 0.18 mum CMOS technology. The temperature sensor which was designed with the bandgap reference circuit is calibrated by trimming common mode voltage of an operational amplifier. The temperature sensor can compensate for other blocks of the IC chip above the special temperature when the ADC was a power off for low power operation. It consumes only 365 muA with a 3 V supply voltage. This temperature sensor can be calibrated up to a maximum 7 degree. And the average error is -0.8degC in sensing range from -30degC to 90degC in comparison with simulation result.

Keywords

CMOS integrated circuits; analogue-digital conversion; operational amplifiers; temperature sensors; ADC; CMOS temperature sensor; band gap voltage reference; bandgap reference circuit; calibration function; common mode voltage; operational amplifier; bandgap; low power; operational amplifier; temperature sensor; trimming;

fLanguage

English

Publisher

ieee

Conference_Titel

Sensing Technology, 2008. ICST 2008. 3rd International Conference on

Conference_Location

Tainan

Print_ISBN

978-1-4244-2176-3

Electronic_ISBN

978-1-4244-2177-0

Type

conf

DOI

10.1109/ICSENST.2008.4757155

Filename

4757155