So, I have this ADS that I am interfacing with a microcontrollter called C2000.
ADS works with a dual supply (+2.5 and -2.5), and C2000 with a 5V.
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.
The whole system consumes around 50mA.
And according to this schematic that i made, 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?
One last idea would be that I could use two 9V battery and use LM7805 to get 5V, followed by LM317 to get 2.5V and same thing to get the - 2.5V. But I don't know if that would be a good approach, even though I don't have to make it work for a long time straight. Just 10 minutes would do.
Any suggestions??
Thanks
ADS works with a dual supply (+2.5 and -2.5), and C2000 with a 5V.
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.
The whole system consumes around 50mA.
And according to this schematic that i made, 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?
One last idea would be that I could use two 9V battery and use LM7805 to get 5V, followed by LM317 to get 2.5V and same thing to get the - 2.5V. But I don't know if that would be a good approach, even though I don't have to make it work for a long time straight. Just 10 minutes would do.
Any suggestions??
Thanks