LAUNCHXL-F28379D: Operate all the 10 channels

Hi Art,

The LAUNCHXL-F28379D does not have ADC D signals pinned out. It does have ADCIN14 and 15 which go to all ADCs however.

http://www.ti.com/lit/sprui73

Art Mecina said:

Also, the ADC cant take negative cycle so it shifted up by a reference voltage given to the ADC, how much is this voltage?

VREFHIA-D are set to 3V using the precision voltage reference IC REF5030IDGKT.

Best,

KEvin

Hello Kevin,

Good day and thank you very much for the information.
Just a follow-up inquiry though. On the board, there is an ADC-D Differential Pair Input on J21.
Does that mean they can't use it?

Thanks for the confirmation.

Art

Hello Kevin,

Good day, i just like to confirm that even though there is an ADC-D Differential Pair Input J21on the board, 
this can't be used because it was not pinned-out?

Appreciate your confirmation on this.

Art

Hi Art,

Oops, my mistake. Yes you can use the ADC channel D signals on J21 without issues.

Sorry about that, I had only checked the 20-pin boosterpack headers.

Best,

Kevin

Hello Kevin,

It's okay. I'm grateful for the assistance. By the way, the customer have additional inquiries.
How much maximum voltage can he give the adc as signal ? in which after exceeding that peak it will clamp the signal ?

Thanks in advance!

Art

Hi Art,

That will depend on the VREFHI value configured for the device. 3.3V is the max value you should have VREFHI be.

Best,

Kevin

Hi Kevin,

The customer mentioned that  he is using the differential input.
Is there are any documentation for that for that ?

Thanks a lot!

Art

Hi Art,

There's a lot of information on differential mode in the ADC section (section 11) of the TRM. If you have a specific question on the mode after reviewing the documentation I'd suggest submitting a new question on E2E.

http://www.ti.com/lit/spruhm8

Best,

Kevin