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DAC8814: Testing DAC8814 without precision Op-amps

Nicholas Razo
Prodigy 20 points
Part Number: DAC8814

Hello, all. I am trying to test whether or not my DAC8814 is functioning properly. The precision Op-amps that were used with it were fried due to being supplied with too much power. I am trying to test it in a configuration similar to figure 64 in the datasheet. However, with my precision Op-amps are fried and my precision voltage reference is also likely fried so it is hard for me to set up this configuration to test the DAC. I have access to an arduino microcontroller, an assortment of general purpose Op-amps, resistors, capacitors, inductors, and basic electronic workbench devices. Is there any configuration I can use to test the DAC that only uses general purpose parts?

  • 0
    TI__Genius 14220 points
    Hi Nicholas,

    Welcome to E2E and thank you for your query. I couldn't find Figure 64 in the DAC8814 datasheet. Were you refering to Figure 63?

    You can replace the precision opamps by bipolar general purpose opamps for basic functionality test. However, you won't get the desired accuracy with GP opamps.

    Are you building the circuit using a bread-board or something? Please make sure the power supply polarities and grounding are proper. You should check the impedances in off condition before powering on. Please use a power supply with current limit as that will minimize the damage caused by simple connection errors.

    Hope this answers your question. Please let me know if you need further support.

    Regards,
    Uttam Sahu
    Applications Engineer, Precision DACs