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DAC81404: Questions for Absolute Maximum Ratings in Power-Off Situation

Kwonjoon Lee
Prodigy 150 points
Part Number: DAC81404


Tool/software:

Hello,

This is Kwonjoon Lee from South Korea.
I always appreciate TI's accurate and fast feedback.

(Questions)

1. The datasheet of DAC81404 (5/53 page) specifies that pin voltage of OUTX to GND cannot exceed AVDD+0.3V.
    I would like to ask if the OUTX pin of the DAC81404 can be driven by voltage source corresponding to 5V in the case that the DAC81404 is fully turned off
   (in other words, in the case that the low dropout regulators connected to AVDD, DVDD, and IOVDD of the DAC81404 are disabled).

2. Furthermore, I would like to ask if the OUTX pin of the DAC81404 whose power supplies are fully turned off can be driven by
    voltage source corresponding to 5V when a maximum driving current of the voltage source is limited to 9mA (under 10mA).

   
Best regards,
Kwonjoon Lee

  • 0
    TI__Mastermind 42273 points

    Hi Kwonjoon,

    Sanjay will review your questions and provide a response soon. 

    Best,

    Katlynne Jones

  • +1 in reply to Katlynne Jones
    TI__Expert 5450 points

    Hi Kwonjoon,
     
     
    1. The datasheet of DAC81404 (5/53 page) specifies that pin voltage of OUTX to GND cannot exceed AVDD+0.3V.
        I would like to ask if the OUTX pin of the DAC81404 can be driven by voltage source corresponding to 5V in the case that the DAC81404 is fully turned off
       (in other words, in the case that the low dropout regulators connected to AVDD, DVDD, and IOVDD of the DAC81404 are disabled).
     
       - This will violate the ABS MAX rating of the device and might damage it permanently.
     
    2. Furthermore, I would like to ask if the OUTX pin of the DAC81404 whose power supplies are fully turned off can be driven by
        voltage source corresponding to 5V when a maximum driving current of the voltage source is limited to 9mA (under 10mA).
     
       - This is again the ABS MAX violation and might damage the device permanently.
      
    Thanks,
    Sanjay