An 0.18μm CMOS electrochemical sensor readout IC for exhaust gas monitoring

Hyuntae Kim, Bertan Bakkaloglu

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

Abstract

A fully integrated 8-channel gas readout analog front-end IC is presented. The IC enables detection and identification of harmful environmental pollutants in exhaust gas fumes for extended periods, which in turn helps with correlating different pollutants with several illnesses. The system can read out an array of eight conductometric and amperometric electrochemical sensors while multiplexing analog-front-end circuitry to reduce die size. The IC consists of a low noise front-end and low DC offset, multiplexed ADC. The conductometric sensor uses a novel current steering approach for extracting impedance of the sensor. To reduce 1/f noise and DC offset voltage, a nested-chopper stabilized ADC is used. The detection analog front-end achieves 67.2 dB SNR at 1.57 mW quiescent power consumption per channel, enabling a chemical detection sensitivity of 1ppm in volume.

Original languageEnglish (US)
Title of host publication2009 Ph.D. Research in Microelectronics and Electronics, PRIME 2009
Pages324-327
Number of pages4
DOIs
StatePublished - Nov 19 2009
Event2009 Ph.D. Research in Microelectronics and Electronics, PRIME 2009 - Cork, Ireland
Duration: Jul 12 2009Jul 17 2009

Publication series

Name2009 Ph.D. Research in Microelectronics and Electronics, PRIME 2009

Other

Other2009 Ph.D. Research in Microelectronics and Electronics, PRIME 2009
CountryIreland
CityCork
Period7/12/097/17/09

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ASJC Scopus subject areas

  • Hardware and Architecture
  • Control and Systems Engineering
  • Electrical and Electronic Engineering

Cite this

Kim, H., & Bakkaloglu, B. (2009). An 0.18μm CMOS electrochemical sensor readout IC for exhaust gas monitoring. In 2009 Ph.D. Research in Microelectronics and Electronics, PRIME 2009 (pp. 324-327). [5201365] (2009 Ph.D. Research in Microelectronics and Electronics, PRIME 2009). https://doi.org/10.1109/RME.2009.5201365