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DAC8775: Output behavior when same register settings are written

Shota Mago
Expert 8410 points
Part Number: DAC8775


Hi team,

My customer is designing his product using DAC8775 and asking a question.

When the DAC is outputting a certain value, what will happen to the output if the exact same setting(same output voltage/range etc.) is written to the register?
(Does it momentarily go Hi-Z, does it cause glitch? or does it just keep same value?)

Best regards,

Shota Mago

  • 0
    TI__Guru* 98575 points

    Shota-san,

    I checked with one of the designers on this question. He mentioned that if there is an LDAC or equivalent signal (and the DAC8775 does have an LDAC pin) then the switches would get just get the same code. There wouldn't be a switch voltage change. There could be some amount of digital feedthrough, but it should be less than a code change glitch.

    Joseph Wu 

  • 0 in reply to Joseph Wu
    TI__Expert 8410 points

    Hi Joseph-san,

    I understood.

    Thank you so much for checking with designer quickly!

    Best regards,

    Shota Mago