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.

DAC7718: output voltage instability

Part Number: DAC7718

  Board-information:STM8S -- DAC7718

  Debug environment :IAR embedded Workbench IDE with ST-LINK

  Soft Logic : Dac-0 is set to 0x000, 0x400, 0x800, 0xc00, 0xfff at every 100 milliseconds

  Expect Output Voltage :-15V,-7.5V,0V,7.5V,15V (refer to screenshot—1)

  Unexpect Output Voltage : (refer to screenshot—2

  When power up use the same exe-bin, Both of these situations are probabilistic. Basically eliminate software problems, Initial suspicion is due to hardware factors such as power supply.

 

                                                                                                                   Expected

    

                                                                                                                                              Unexpeted