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Original question:

TMS320F280049: DAC Offset Adjustment

TMS320F280049: DAC Offset Adjustment with internal reference 1.65V

Wayne Huang
Genius 16365 points
Part Number: TMS320F280049

Dear Champs,

I am asking this for our customer that we discussed before in below link in more detail.

https://e2e.ti.com/support/microcontrollers/c2000-microcontrollers-group/c2000/f/c2000-microcontrollers-forum/1285778/tms320f280049-dac-offset-adjustment/4876527?tisearch=e2e-quicksearch&keymatch=dac%20wayne#4876527

If they use internal reference 1.65V, they should call below API from driverlib in DAC initialization codes like below.

DAC_tuneOffsetTrim(DACB_BASE, 1.65);

Is it correct?

That is, we want to confirm it's 1.65 rather than 3.3 even they use DAC with gain setting x2.