ADS1262EVM-PDK: An error occured after connected to EVM

Hi user5139868,

That error appears to indicate that ADCPro is unable to read the ID register of the ADS1262...

Is the EVM enumerating as a "USBStyx" device in Windows Device Manager, as shown below?

Are the ADS1262EVM jumpers and switches configured in their default positions?

Are the MMB0 jumpers configured correctly and are ALL of the power LED indicators on the bottom-right side of the board on?

Double check the power connections and jumper settings and let me know if you have issues. You can reference the ADS1262EVM-PDK User's Guide for more information:

Best regards,
Chris

Hi Christopher,
Really appreciate your reply. I double checked the environment including jumper settings and power connection, and everything is fine.
I opened ADCPro again and I checked the device manager finding the EVM enumerating as a "USBStyx" device as you said.
But this time, ADCPro accidentally went well. The error window didn't pop up this time. I got confused again.

Hi Christopher,

Thanks again!

I met some new problems, as you see in the pic below.

I used AVDD to test the EVM, and the result didn't come as expected to be 7FFFFFFFh for several times.

Besides, I chose the digital filter as Sinc4 50sps. As the datasheet demonstrate, ENOB should be 24.7. But in the pic below,ENOB was only 18.33.

PS, I achieved the  right result of 7FFFFFFFh only once. I checked all settings, and nothing changed.

Hi Gavin,

When measuring the analog supply, I wouldn't expect 7FFFFFFFh to be the result. The analog supply measurement is divided by 4 so that it doesn't over-range the ADC. I would double your reference configuration... if the internal reference it turned off, then you might get a full-scale (7FFFFFFFh) result.

In the image you posted, you're seeing codes around 1075660000 (decimal). For a 2.5V reference and PGA = 1 V/V, this corresponds with a voltage reading of about 1.25V, which when multiplied by 4 is precisely 5V. This looks correct!

Best regards,
Chris