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TMS320F280039C: DACA_OUT pin does not have 3 3V

Roman Rundel
Prodigy 30 points
Part Number: TMS320F280039C
Other Parts Discussed in Thread: SYSCONFIG, C2000WARE

Hello,

I am trying to output 3,3V on my DACA_OUT Pin.

I am using a TMS320F280039C SPM the 64-pin IC

DACA_OUT is on pin 15

I am using Code Composer Studio v20 with the build-in SysConfig tool.

I added a screenshot of the TRM and the sysconfig tool ccsv20_trm_f280039c.png

How do i have to configure to achvie the 3,3V output ?

  • 0
    TI__Expert 4200 points

    Roman,

    You can use C2000 Ware example number 1 by importing in CCS from: C:\ti\c2000\C2000Ware_6_00_00_00\driverlib\f28003x\examples\dac\CCS

    Example project sysconfig will show you the exact configuration required for your need. Also, note that you need to connect 3.3V to VDAC pin if you select VDAC pin as your reference. You can read description in .c file of the example.

    Regards,

    Sumit

  • 0 in reply to Sumit Patil1
    Prodigy 30 points

    Is VDAC the external reference voltage? Is VDAC on Pin 8 of the 64-pin F280039C ?

    VREFHi (Pin 16) is set to 1,165 V. VDAC is not connected.

    So if i use VDAC , the voltage on the DACA_OUT pin (15) is 0V. This i understand.

    Can i get with this configuration an output voltage of more than 1,165 V ? Or is the VREFHI the max limit ?

  • +1 in reply to Roman Rundel
    TI__Expert 4200 points

    Yes, VDAC is external reference.

    Yes, that's Pin8 on 64pin device and you need to connect external 3.3V to this pin to get 3.3V maximum on DAC.

    VREFHi is reference to ADC module and not the DAC. VREFHi max limit is 3.3V. You can refer the datasheet.

    Regards,

    Sumit