@inproceedings{cca8e17e42004ca49dcd53689b7be633,
title = "A 92-dB-DR 126-µV sensitivity potentiometric sensor interface with high interference robustness",
abstract = "A fully differential potentiometric sensor interface consisting of a high input impedance programmable-gain preamplification stage followed by a delta-sigma (∆Σ) ADC is presented. The reconfigurable circuit achieves a dynamic range of 92 dB and a resolution of 126 µV, thus enabling electrochemical analyses for multiple biochemical parameters. The fully differential topology of the signal acquisition chain in combination with the use of feedforward compensated opamps leads to a high interference robustness of the implementation. Compared to a single-ended topology, PSRR, CMRR and EMIRR improvements by 43.3 dB, 6.8 dB and 21.6 dB, respectively, are achieved. These properties and the low power and area consumption of 75 µW and 0.081 mm 2 allow the circuit to be used in wirelessly powered electrochemical point-of-care (PoC) diagnostics. ",
keywords = "Interference, Dynamic range, Robustness, Topology, Impedance, Feedforward systems, Signal resolution, Programmable-gain amplifier (PGA), Wireless power transfer (WPT), Delta-sigma (∆Σ) ADC, Potentiometry, Interference robustness, Frequency compensation, Biosensor, Feedforward",
author = "Markus Haberler and Christoph Steffan and Inge Siegl and Norbert Sailer and Mario Auer",
year = "2021",
month = may,
day = "28",
doi = "10.1109/ISCAS51556.2021.9401227",
language = "English",
series = "Proceedings - IEEE International Symposium on Circuits and Systems",
publisher = "IEEE Publications",
pages = "1--5",
booktitle = "2021 IEEE International Symposium on Circuits and Systems, ISCAS 2021 - Proceedings",
note = "53rd IEEE International Symposium on Circuits and Systems : ISCAS 2021 ; Conference date: 22-05-2021 Through 28-05-2021",
}