TMS320F28069: Change on one ADC Pin disturbs other values being read by another ADC pin

Hi,

Our expert will get back ASAP.

Thanks,

Saravanan

Hello Prashant,

It's a little bit difficult to tell the displacement of the disturbance in the plot, is it possible for you to measure this? It would help to have some idea how much deviation is occurring from the expected value.

Best regards,

Omer Amir

Thank you for your response, Omer

I could, actually. But I have a bigger problem now. :

"TMS320F28069M: Launchpad shuts off immediately after connecting - C2000 microcontrollers forum - C2000︎ microcontrollers - TI E2E support forums" 

However, if you can tell me any possible reasons behind this ADC disturbance issue. It will be helpful for future reference.

Regards,
Prashant 

Hi Prashant,

Some key things could be simply making sure the pins are not near any sources of noise (this could be in the form of other devices which have oscillating clocks, signals, etc. or simply anything that produces electrical disturbance) since these could affect the reading of electrical signals. Also, have you tried using a capacitor on the ADC input pin? This can help filter the noise on the input.

Let me know when you're able to test these things out, I know that the other issue you're having is more pressing.

Best regards,

Omer Amir