Title :
An integrated CMOS potentiostat for miniaturized electroanalytical instrumentation
Author :
Reay, R.J. ; Kounaves, S.P. ; Kovacs, G.T.A.
Author_Institution :
Center for Integrated Syst., Stanford Univ., CA, USA
Abstract :
Two major limiting factors in mass production and field use of electroanalytical instruments have been the size and cost of potentiostats. This monolithic CMOS potentiostat has performance comparable to bench-top instruments at a fraction of the size, power consumption and cost. A block diagram of the potentiostat chip is shown. An integrating DAC sets the voltage between the working electrode, where the electrochemical reactions of interest take place, and a chemically stable reference electrode. The control amplifier regulates this voltage using feedback to drive a third (counter) electrode. The working electrode current is measured with a current-input dual-slope ADC.<>
Keywords :
CMOS integrated circuits; digital-analogue conversion; electrochemical analysis; electrochemical electrodes; potentiometers; power consumption; voltage measurement; bench-top instruments; block diagram; chemically stable reference electrode; control amplifier; cost; current-input dual-slope ADC; electroanalytical instruments; electrochemical reactions; feedback; field use; integrated CMOS potentiostat; integrating DAC; limiting factors; mass production; miniaturized electroanalytical instrumentation; monolithic CMOS potentiostat; potentiostat chip; power consumption; size; working electrode; working electrode current; Chemicals; Costs; Counting circuits; Current measurement; Electrodes; Energy consumption; Feedback; Instruments; Mass production; Voltage control;
Conference_Titel :
Solid-State Circuits Conference, 1994. Digest of Technical Papers. 41st ISSCC., 1994 IEEE International
Conference_Location :
San Francisco, CA, USA
Print_ISBN :
0-7803-1844-7
DOI :
10.1109/ISSCC.1994.344686
