Sub-mW Reconfigurable Interface IC for Electrochemical Sensing

The IronIC project has the aim of developing a fully implantable and remotely powered platform for the real- time monitoring of human metabolites. In this paper we present a mixed-signal interface IC for the electrochemical sensing data acquisition chain. The IC controls and reads out up to five biomolecular sensors, by receiving commands from a standard interface to conduct <i>chronoamperometry</i> (CA) and <i>cyclic voltammetry</i> (CV). Different voltage profiles are generated by using a single fully on-chip reconfigurable waveform generator, while the measured data are digitized. The IC is realized in 0.18 μm CMOS technology. Electrical measurements show that the linear readout current range is ±1650 nA with 8-bit resolution. The cyclic voltammetry of potassium ferricyanide and the chronoamperometry of hydrogen peroxide have been successfully performed with the interface. The IC consumes 0.92 mW from 1.8 V supply voltage, making it suitable for remotely powered and implantable applications.

Published in:
Proceedings of the IEEE Biomedical Circuits and Systems Conference (BIOCAS 2014), 232-235
Presented at:
IEEE Biomedical Circuits and Systems Conference (BIOCAS 2014), Lausanne, Switzerland, October 22-24, 2014

 Record created 2014-09-30, last modified 2018-01-28

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