• State TI Thinks Resolved
  • Locked Locked
  • Replies 1 reply
  • Answers 1 answer
  • Subscribers 81 subscribers
  • Views 691 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.

CCS/TMS320F28377D: DAC output voltage

Susan Yang
Genius 9955 points

Part Number: TMS320F28377D

Tool/software: Code Composer Studio

Dear team,

I found the DAC output voltage range is 0-3V.

Can I use the op amp to change the voltage output range to -5V to +5V without using an additional DA chip?

Is there any problem with using the op amp to change the output range of the voltage?


I used the OPA188 to try to change the output range of the voltage.

3377.DAoutput.TSC



BR,
SUSAN
  • 0
    TI__Mastermind 28275 points

    Hi Susan,

    Basically i think what you are looking to do is amplify and split the DAC output, in other words, create a virtual ground. I have personally not done this so can't recommend a specific solution but it looks like there are various solutions to this. Your best bet is to ask this question on the analog forum. You can start with the op amp forum. It doesn't matter if the DAC is the input to this design. I would recommend you generalize the question to one that takes a single supply voltage and splits it.

    The app-note below does something similar using a switcher.

    http://www.ti.com/lit/an/slva712/slva712.pdf