A Fully Differential Potentiostat

Author

Martin, Steven M. ; Gebara, Fadi H. ; Strong, Timothy D. ; Brown, Richard B.

Author_Institution

Avago Technol., Fort Collins, CO

Volume

9

Issue

2

fYear

2009

Firstpage

135

Lastpage

142

Abstract

Low-voltage, single-ended (SE) potentiostats are unable to detect many analytes of interest because the oxidation potentials of these analytes are greater than the voltage that the potentiostat can deliver to the electrodes. In this work, a fully-differential (FD) potentiostat is described which enables detection of a wide range of analytes using a supply voltage of 1.8 V. The FD potentiostat was implemented in TSMC´s 0.18 mum CMOS process and has been verified experimentally. A theoretical discussion of the FD potentiostat is given and comparisons to SE potentiostats are provided. Biological and environmental analytes are chemically detected using the FD potentiostat.

Keywords

CMOS analogue integrated circuits; amperometric sensors; biosensors; electrochemical analysis; electrochemical electrodes; microfabrication; CMOS analog integrated circuits; FD potentiostat; TSMC; biological analytes detection; electrochemical analysis; environmental analytes detection; fully differential potentiostat; microfabricated amperometric sensor; oxidation potential; single-ended potentiostat; size 0.18 mum; voltage 1.8 V; Amperometric sensors; Biochemical analysis; Biomedical transducers; CMOS process; Chemical analysis; Chemical sensors; Dynamic range; Electrodes; Oxidation; Voltage; CMOS analog integrated circuits; Chemical transducers; electrochemical analysis; potentiostat;

fLanguage

English

Journal_Title

Sensors Journal, IEEE

Publisher

ieee

ISSN

1530-437X

Type

jour

DOI

10.1109/JSEN.2008.2011085

Filename

4749400