Title :
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
fDate :
Nov. 30 2008-Dec. 3 2008
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;
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
DOI :
10.1109/ICSENST.2008.4757155
