The development and performance of a reconfigurable integrated read-out circuit for resistive heterogeneous 2D Metal-Oxide gas-sensor grids with local temperature control capability are reported. The MOX grid interface circuit is based on a resistance-to-frequency converter able to deliver up to 380 operating read-out configurations for a 5 x 5 sensing device. Temperature regulation of each row of the grid is provided thanks to independent sensor embedded platinum heaters and thermometers and separated control loops. The gas sensor front-end circuit prototype, developed in 0.35 μm technology with 3.3 V supply, features 170 dB dynamic range, while temperature regulation is guaranteed between ambient and 500°C with an accuracy of 1°C including residual dynamic ripple. To run a given sequence of measurements, reading-out digital output converted values, I2C serial interface is provided. © 2014 Springer Science+Business Media.
Conso, F., Grassi, M., Lombardi, A., Malcovati, P., Baschirotto, A. (2014). A multiplexed 20-channel 6-decade range resistance-to-digital converter for 2D heterogeneous metal-oxide gas-sensor arrays. In F. Baldini, A. D’Amico, C. Di Natale, P. Siciliano, R. Seeber, L. De Stefano, et al. (a cura di), Sensors: Proceedings of the First National Conference on Sensors, Rome 15-17 February, 2012 (pp. 559-564). springer [10.1007/978-1-4614-3860-1_99].
A multiplexed 20-channel 6-decade range resistance-to-digital converter for 2D heterogeneous metal-oxide gas-sensor arrays
BASCHIROTTO, ANDREAUltimo
2014
Abstract
The development and performance of a reconfigurable integrated read-out circuit for resistive heterogeneous 2D Metal-Oxide gas-sensor grids with local temperature control capability are reported. The MOX grid interface circuit is based on a resistance-to-frequency converter able to deliver up to 380 operating read-out configurations for a 5 x 5 sensing device. Temperature regulation of each row of the grid is provided thanks to independent sensor embedded platinum heaters and thermometers and separated control loops. The gas sensor front-end circuit prototype, developed in 0.35 μm technology with 3.3 V supply, features 170 dB dynamic range, while temperature regulation is guaranteed between ambient and 500°C with an accuracy of 1°C including residual dynamic ripple. To run a given sequence of measurements, reading-out digital output converted values, I2C serial interface is provided. © 2014 Springer Science+Business Media.
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
