Request for help: Changing to hgiher sample rate and turning off filtering

[JamesTimothyMeech]

Hello, thanks for all the great work on the breakout board and the accompanying code.

I'm attempting to up the sample rate to 38400 SPS.

To do this I have changed the values written to the MODE1 and MODE2 registers as follows:

ads1262_Reg_Write(MODE1, 0x60);
delay(10);
ads1262_Reg_Write(MODE2, 0x0F);

When I run the code with these values I observe rail to rail random variation in the output in the signal even when measuring a constant voltage. This is not the expected operation.

Am I missing some other register value that I need to change to get this to work?

[HSMinches]

Hello James! Did u setup your INPMUX registers instead of just setting up the MODES? e.g. :

PC_ADS1262.ads1262_Reg_Write(INPMUX, B00001010); // ain0 - aincom
PC_ADS1262.ads1262_Reg_Write(MODE1, B01100000);
PC_ADS1262.ads1262_Reg_Write(MODE2, B01010000);

And regarding the Voltage supply of the ADC are u using +- 2.5V or +5V? I am asking because this will interfere depending on the measurement mode you are using ( PGA enabled or disabled, and the negative measure reference as well). I suggest that you take a look at page 119 of the ads1262 datasheet for more info on that matter.

Edit: Your registers are correct if your electrical connections are following the datasheet guidelines.
Edit 2 because I forgot to mention in edit 1: the MODE2 binary I used as example isn't correlated to yours, it is simply an example of my code.

Best regards.
Heitor S. Mendes