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Applying input to an unpowered AD8138??

Question asked by ddurachk on Jan 15, 2016
Latest reply on Jan 20, 2016 by AnnaFeB

Good afternoon,

 

I have a question concerning the AD8138 amplifier, I am using this as an input stage to our ADC.  From our system standpoint, we will have periods of down time where we will be powering down the more power hungry devices (which includes the ADC).  We don't want to have a situation where the amplifier is feeding pulses into our ADC when it is powered down, so we are sequencing the power to prevent that.  However, it's not clear to me if the AD8138 will be at risk if it is receiving pulses while it's powered down.  I did not find any guidance on this yet.

 

That's the background, my question is simply:  Can I feed an input signal into the AD8138 while it's powered down without risking damage to that part? 

 

Dave Durachka

NASA GSFC

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