• State
  • Locked Locked
  • Replies 1 reply
  • Subscribers 46 subscribers
  • Views 37 views
  • Users 0 members are here
Support feedback
Options
Options
Similar topics

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.

AMC60704: VDAC output voltage incorrect issue in EVM evaluation

Andrew Su
Intellectual 1360 points
Part Number: AMC60704

Tool/software:

dears,

one of my top optical module customer is evaluating AMC60704 and met issue

The SPI value written by AMC60704 DAC/ADC GUI software after the voltage is given according to the specification is inconsistent with the output voltage of the test board (for example, SPI writes FFF. According to the specification, the test board should output 2.49939V voltage, but the actual output voltage is 3.3). Please help to advice the root cause and how to fix the issue. do we have the detailed tutorial on how to conduct all the evaluation tests on the EVM with the GUI besides the unboxing video?

Thank you for your help!

  • 0
    TI__Mastermind 34088 points

    Hi Andrew, 

    Is the customer using a 3.3V VDD? If so, has the customer selected the 2.5V range, or 5V range (configured in the VDAC_GAIN field)? The range is not determined by VDD, but by the range selection bits. I expect they are using the 5V range and the output is clipping at 3.3V. 

    Best,

    Katlynne Jones