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DAC5681: output of IOUTA1 and IOUTA2

ttd
Mastermind 7720 points
Part Number: DAC5681

Dear Technical Support Team,

I'd like to avoid unexpected output of  IOUTA1 and IOUTA2 during power on and not supplied (before suplied) CLKIN/CLKINC.

How does default output of DAC5681 behave such as these situation ?

Best Regards,

ttd

  • 0
    TI__Mastermind 20541 points

    HI ttd,

    The SYNCP/N pins is provided in the DAC which will disable to analog output of the DAC. Please hold this pins low before you are ready for an analog signal. 

    Regards,

    Neeraj

  • 0 in reply to Neeraj Gill
    Mastermind 7720 points

    Neeraj,

    Thank you for your reply.

    I understand that  SYNCP/N pins should be low for disable analog output.

    Is it possible to insert pull up and pull down such as fail safe on SYNCP/N for disable the analog output during power-on ?

    Or internal pull up of RESETB work, so should I install external pulldown(strong than internal pull up) on RESETB to disable analog output before FPGA drives SYNCP/N(during power-on)?

    How is value of internal pull up of RESETB?

    Best Regards,

    ttd

  • 0 in reply to ttd
    TI__Mastermind 20541 points

    Hi ttd,

    I would suggest you use the SYNCP/N instead of ResetB. You can try adding a pull down and pull up on Syncp and Syncn pins respectively. 

    Regards,

    Neeraj