TMS320F2837xS Delfino ADC VREF

Michael L

Prodigy 230 points

What is the VREFHIA and VREFHIAB value ?

I think that would be 3,3V, but in fact the results are corret just for 3V reference.

Is it possible that the VREFHIA are configured to 3V instead 3.3V ? Thanks

over 7 years ago

0 Joseph Casuga over 7 years ago

TI__Mastermind 39410 points

Hi Peter,

Can you let me know what hardware are you using? Do you know which position the VREF switch is connected to in that hardware?

Thanks,

Joseph

0 Michael L over 7 years ago in reply to Joseph Casuga

Prodigy 230 points

Hi Joseph ,

It is LaunchPad F28377s.
I think it would be 3.3V, but the ADC conversion behavior seems to be 3v

Tanks

0 Joseph Casuga over 7 years ago in reply to Michael L

TI__Mastermind 39410 points

Hi Peter,

The F28377S Launch pad uses an buffered VREFHI IC (REF3030) and it is a fixed 3.0V voltage reference so the results you are seeing are correct for 3V.

Regards,

Joseph

0 Michael L over 7 years ago in reply to Joseph Casuga

Prodigy 230 points

Hi Joseph,

Thanks very much for your help, I'm grateful.

Where I can find that information, there is in datatsheet or schematic?

0 Michael L over 7 years ago in reply to Joseph Casuga

Prodigy 230 points

Joseph, I already find that information in documentation. Thanks

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TMS320F2837xS Delfino ADC VREF