I made the following schematics and I can get a +-2.5V to supply the ADS1299.
I use the C2000 to interface with ADS1299, which means that both grounds should be tied together.
And according to this schematic, this isn't possible because the references are different.
At first I thought about making separate rails:
This is definitely gonna work, both devices could share the same ground. Although, the parts I would need for this can't be found easily in my country, and I would need to buy most of them from somewhere else which would take time and money.
So, going back to my first schematic. Instead of putting the c2000 before, I would put it after the ampop. But I would have to use a battery to bring up the voltage to 5V (I have a 2.4V battery so it would work) Something like this.
Or maybe a different approach. Back to my 1st schematic, what if I make an unbalanced voltage divider?
