A7.3 pH Measurement System-on-Foil Aided with a Mixed Signal Processor
- SMSI 2021
2021-05-03 - 2021-05-06
- SMSI 2021 - Sensors and Instrumentation
- A7 Packaging and Integration of Sensors
- M. Fahem, M. Steinmaßl, K. Neumeier, I. Eisele - Fraunhofer Institute EMFT, München (Germany), E. Korek, R. Brederlow - TU München, München (Germany)
- 85 - 86
A microcontroller with an analog front-end is integrated with 3 on-chip FG-ISFETs sensors produced at the EMFT on a pH measurement system-on-foil. The MCU offers the ability to fully control the ISFETs by keeping them at constant biasing through a software configured feedback loop. The pH sensor precision and stability are highly enhanced by reading 2 ISFETs at a time. By the differential measurement, the drift and noise compensations are achieved. The whole system can be integrated on a 10 x 10 mm flexible printed circuit board.