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DAC81404: Request for guidance of the power-down sequence

Kwonjoon Lee
Prodigy 150 points
Part Number: DAC81404


Tool/software:

Hello,
This is Kwonjoon Lee from South Korea.

(Question)

1. Could you provide clear guidance for power-down sequence of the DAC81404?
    In Figure 7-39 of the datasheet, the power-down sequence is quite unclear compared to the power-up sequence in Figure 7-38.
    I would like to ask if AVDD should be fully turned off before DVDD power-down, and DVDD should be fully turned off before IOVDD power-down.

Best regards,
Kwonjoon Lee

  • +1
    TI__Expert 5140 points

    Hi Kwonjoon,
     
    Figure 7-38 and 7-39 are just an example to showcase the DAV VOUT response while power supplies are turned-on/off. 
     
    This device does not have any supply sequencing requirement, while using the internal reference.

     

    Thanks,

    Sanjay