Title :
A CMOS temperature sensor with a 3σ inaccuracy of ±0.1°C from -55°C to 125°C
Author :
Pertijs, Michiel ; Makinwa, Kofi ; Huijsing, Johan
Author_Institution :
Delft Univ. of Technol., Netherlands
Abstract :
A smart temperature sensor is accurate to within ±0.1°C (3σ) over the full military temperature range of -55°C to 125°C. This 5× improvement is achieved using DEM, a current-gain independent PTAT bias circuit, and a low-offset ΔΣ ADC combining chopping and CDS. The sensor is fabricated in 0.7μm 2M1P CMOS with 4.5mm2 area and draws 75μA.
Keywords :
CMOS integrated circuits; delta-sigma modulation; intelligent sensors; military equipment; sigma-delta modulation; temperature sensors; -55 to 125 degC; 0.7 micron; 2M1P CMOS; 75 muA; CDS; CMOS temperature sensor; DEM; chopping; current-gain independent PTAT bias circuit; low-offset ΔΣ ADC; military temperature range; smart temperature sensor; CMOS technology; Calibration; Circuits; Digital modulation; Feedback; Multiplexing; Photonic band gap; Temperature distribution; Temperature sensors; Voltage;
Conference_Titel :
Solid-State Circuits Conference, 2005. Digest of Technical Papers. ISSCC. 2005 IEEE International
Conference_Location :
San Francisco, CA
Print_ISBN :
0-7803-8904-2
DOI :
10.1109/ISSCC.2005.1493957
