Other Parts Discussed in Thread: ADS1298
Hi All,
We are designing an EEG device. we use ADS1298 to read from EEG data and another ADS1298 to read between voltage or current. This is the schematic:
My problem is that i want to use this ADS1298 for two situations: (1) measuring INnP-INnN for instance ADC_ShuntnP-ADC_ShuntnN. (2) Measuring INnP - A fixed voltage like RLD or 0. I don't know if there is any configuration that allows establishing a fixed voltage only at INnN even if there's already an external voltage at INnN but i don't want to use it.
Please notice that i don't want to put any external switching, I am just asking if there's any configuration that allows for one case measuring the differential voltage at Analog inputs and in another case measuring INnP with a fixed voltage:
for example:
measuring ADC_Shunt7P-ADC_Shunt7N in one case. And ADC_Shunt7P-0 or 1,25.
P.S. VREF_BUFF is 1,25. I have the ADS1298-EVM so i can try any solution proposed.
Sincerely,
Conrad Holt Mestres
