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

fYear

2006

fDate

6-9 Feb. 2006

Firstpage

1131

Lastpage

1140

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Solid-State Circuits Conference, 2006. ISSCC 2006. Digest of Technical Papers. IEEE International

Conference_Location

San Francisco, CA

ISSN

0193-6530

Print_ISBN

1-4244-0079-1

Type

conf

DOI

10.1109/ISSCC.2006.1696158

Filename

1696158