Title :
A CMOS Interface for a Gas-Sensor Array with a 0.5%-Linearity over 500k/spl Omega/-to-1G/spl Omega/ Range and 2.5/spl deg/C Temperature Control Accuracy
Author :
Malfatti, M. ; Stoppa, David ; Simoni, Alexandra ; Lorenzelli, Leandro ; Adami, Andrea ; Baschirotto, A.
Author_Institution :
Center for Sci. & Technol. Res., Trento
Abstract :
The interface IC includes 8 read-out channels and 2 closed-loop temperature control circuits, is fabricated in 0.35mum 2P4M CMOS and dissipates 27mW from a 3.3V supply. The read-out structure, based on a controlled oscillator, achieves a 0.5% linearity and a SNR >48dB over the 500kOmega-1GOmega sensor resistance range with a 114dB DR. The temperature control systems maintain a 100degC gradient in the range 100 to 400degC with plusmn2.5degC accuracy
Keywords :
CMOS integrated circuits; closed loop systems; gas sensors; readout electronics; temperature control; 0.35 micron; 100 to 400 C; 27 mW; 2P4M CMOS; 3.3 V; CMOS interface; closed-loop temperature control circuits; gas sensor array; readout channels; readout structure; temperature control accuracy; temperature control systems; Capacitors; Circuits; Frequency; Gas detectors; Oscillators; Sensor arrays; Temperature control; Temperature dependence; Temperature sensors; Thermal resistance;
Conference_Titel :
Solid-State Circuits Conference, 2006. ISSCC 2006. Digest of Technical Papers. IEEE International
Conference_Location :
San Francisco, CA
Print_ISBN :
1-4244-0079-1
DOI :
10.1109/ISSCC.2006.1696158
