• State TI Thinks Resolved
  • Locked Locked
  • Replies 1 reply
  • Answers 1 answer
  • Subscribers 46 subscribers
  • Views 710 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

dac121s101 programming

Sara Caron76
Prodigy 150 points
Other Parts Discussed in Thread: DAC121S101

Hi

I am trying to program my Dac121S101 with a programmers pod. It does not appear to be programming via the SPI bus. I have tried three values in Hex from the programmer's pod, 10 00, 00 00, 00 FF. The circuit is as follows

Any ideas?

Thanks

  • 0
    TI__Genius 16890 points

    Hello Sara,

    If you send 0x0000 you should get 0V out of the DAC.  The command 0x00FF should give you the max output, which is the value of the supply.  If you are not getting these values, you should look at the SYNC, SCLK and DIN pins with a scope while sending a command.  Compare the waveforms to Figure 2 in the datasheet and make sure that you have the correct voltage levels and timing.

    There was not a schematic attached to the post, so I cannot comment on it.

    Mike