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AD5272 / AD5274 Power-up sequence

Question asked by Padbol on May 8, 2012
Latest reply on May 8, 2012 by Padbol

Hello,

 

Currently reading the datasheet of these components, I wish to ask you some more information about the power-up sequence.

 

On page number 24 of the datasheet (revision C), I can read that the ideal power-up sequence is : 1.VSS, 2. VDD and then Va/Vw

 

But on the AD5272 FAQ (http://www.analog.com/en/digital-to-analog-converters/digital-potentiometers/ad5272/products/technical-documentation/index.html), under the question "Is there a power-up sequence?" I read that the power-up sequence is 1. VDD, 2. VSS and then Va/Vw

 

So I wonder which sequence is the right one?  Is it really important ?

 

I thank you

 

S.M.

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