CMOS-based on-chip electrochemical sensor

Tao Luo, Hongyi Wang, Hongjiang Song, Jennifer Blain Christen

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

5 Scopus citations

Abstract

We describe an integrated CMOS electrochemical sensor with on-chip electrodes and packaging. The CMOS chip was fabricated in a standard 0.5 μm CMOS process, and it contains potentiostat circuits with integrated array of three electrode cells. In the potentiostat circuit, we designed high performance folded cascode class-AB operational amplifiers with rail to rail input and output suitable for low power consumption and strong drive capability. The 1.5 mm × 3 mm potentiostat array chip operates from a 5 V supply at 45 μA. A gold electrode array was made on the surface of the CMOS chip using a contact photolithographic process. For compatibility with liquid test environments a packaging approach was developed. The electrochemical sensor with on-chip electrodes was characterized by using cyclic voltammetry (CV) with potassium ferricyanide.

Original languageEnglish (US)
Title of host publicationIEEE 2014 Biomedical Circuits and Systems Conference, BioCAS 2014 - Proceedings
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages336-339
Number of pages4
ISBN (Electronic)9781479923465
DOIs
StatePublished - Dec 9 2014
Event10th IEEE Biomedical Circuits and Systems Conference, BioCAS 2014 - Lausanne, Switzerland
Duration: Oct 22 2014Oct 24 2014

Publication series

NameIEEE 2014 Biomedical Circuits and Systems Conference, BioCAS 2014 - Proceedings

Other

Other10th IEEE Biomedical Circuits and Systems Conference, BioCAS 2014
CountrySwitzerland
CityLausanne
Period10/22/1410/24/14

ASJC Scopus subject areas

  • Hardware and Architecture
  • Biomedical Engineering

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