Ion Sensitive Field Effect Transistors (ISFETs) have been widely used in different applications because of its rapid response and robustness. There are many structures of conditioning circuits proposed for ISFETs oriented to specific applications and a integrated solutions. This paper, proposes a completely embedded readout circuit and processing system to employ them as part of pH monitoring systems. The implementation was performed in the mixed signal microcontroller PSoC 5LP, with a classical constant-current and constant-voltage structure (CVCC) of 25μ and 300mV. Results shows a sensibility of 51mV/pH at 25°C and a compensated output with 0.02pH of tolerance and 0.02 of resolution.
|Title of host publication||9th IEEE Latin American Symposium on Circuits and Systems, LASCAS 2018 - Proceedings|
|Publisher||Institute of Electrical and Electronics Engineers Inc.|
|Number of pages||4|
|State||Published - 28 Jun 2018|
|Event||9th IEEE Latin American Symposium on Circuits and Systems, LASCAS 2018 - Puerto Vallarta, Mexico|
Duration: 25 Feb 2018 → 28 Feb 2018
|Name||9th IEEE Latin American Symposium on Circuits and Systems, LASCAS 2018 - Proceedings|
|Conference||9th IEEE Latin American Symposium on Circuits and Systems, LASCAS 2018|
|Period||25/02/18 → 28/02/18|
Bibliographical notePublisher Copyright:
© 2018 IEEE.
- readout circuit
- temperature compensation