AD7400 power supply

Hello

Do VDD1 and VDD2  of AD7400 have specification of rising time at power up ?

Our customer's power supply IC to AD7400_VDD output 1.2V~1.6V for a certain period (300us~1ms), and output 5V after that.

Is there any problem with above?

I can not find the specification of rising time at power up in AD7400 datasheet.

If  above  has any conern , please let me know your advice.

Regards,

Terumasa

Parents
  • Hello johnnnyG

    Thank you for your advice.

    As you mention, our customer's power supply condition does not exceed the absolute maximum ratings.

    But,  I think  below power up sequence may be bad for IC.

    "power supply rail goes up - down or stop temporary by reaching 5V( IC turn ON) ,

    So, there is no problem if a concern for this condition is absolute maximum ratings only.

    If you have any other concern of AD7400 for this condition , please let me know you advice.

    Regards,

    Terumasa

Reply
  • Hello johnnnyG

    Thank you for your advice.

    As you mention, our customer's power supply condition does not exceed the absolute maximum ratings.

    But,  I think  below power up sequence may be bad for IC.

    "power supply rail goes up - down or stop temporary by reaching 5V( IC turn ON) ,

    So, there is no problem if a concern for this condition is absolute maximum ratings only.

    If you have any other concern of AD7400 for this condition , please let me know you advice.

    Regards,

    Terumasa

Children
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