Low power analog frontend for ISFET sensor readout

A low power analog frontend (AFE) for Ion-Sensitive Field effect Transistor sensor readout presented. The AFE is demonstrated with off-the-shelf components. It includes a biasing circuit to an ISFET sensor, a noise rejecting current readout circuit, and a igma-delta analog to digital converter. The digital output can be interpreted by a simple counter to acquire the ion-concentration in a drop of liquid on top of the calibrated ISFET sensor. A PH sensing experiment is performed validate the AFE. Total power consumption is less than 40 μW with 1.8 V supply.


Presented at:
17th International Meeting on Chemical Sensors - IMCS 2018, Vienna, Austria, 2018-07-15 - 2018-07-19
Year:
Jul 15 2018
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Note: The status of this file is: EPFL only


 Record created 2020-01-24, last modified 2020-04-20

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