Hello,
In this question:
https://e2e.ti.com/support/sensors/f/sensors-forum/912917/lmp91200-ph-electrode
RE: the user supplied circuit diagram.
The guard ring appears to be passive (not connected). The data sheet for lmp7721 8.1.1, suggests it should be driven, and connected to the inverting input, if using non inverting unity gain config.
Is either acceptable? or am I just not seeing the connecting trace in the linked question?
Thank you
