Title :
A Fully Differential Potentiostat
Author :
Martin, Steven M. ; Gebara, Fadi H. ; Strong, Timothy D. ; Brown, Richard B.
Author_Institution :
Avago Technol., Fort Collins, CO
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;
Journal_Title :
Sensors Journal, IEEE
DOI :
10.1109/JSEN.2008.2011085
