The reference voltage selection for AD4115 is AVDD - AVSSAD

Hi HJM ,

It seems that there is an error in the plot of the Eval+ Software when the AVDD-AVSS is used a reference. I replicated your setup with a 3V input. The voltage plot also shows a -3V.

To check the correct output, you may set the units of the plot to Code (Dec).

Converting the measured code, 8885241 to voltage using the equation below, the actual measured voltage is ~2.96V. The possible reason is that the Vref used by the Eval+ Software is AVSS-AVDD instead of AVDD-AVSS. It is only an error on how the Eval+ converts the measured code to voltage. but the actual code measurements are correct.

We would like to also inform you that we have also migrated to another software platform which is the ACE software. The ACE software is compatible with the EVAL-AD4115SDZ and SDP-B. It also includes demo modes and tutorial for ease of use of the software. You can download the ACE in this link. Analysis | Control | Evaluation (ACE) Software | Analog Devices

Regards,

JC

Hi JCCillion,

Thank you very much for your reply. It will be very useful to me！

Regards,

HJ

Hi HJM ,

We would greatly appreciate if you could verify the answer if it has helped you. This will also help other members of the community with similar issues. Thank you very much.

Regards,

JC