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AD7656 protection diodes

Question asked by apomerants on Feb 28, 2013
Latest reply on Mar 14, 2013 by clairec

Hello

In the last datasheet of the AD7656, figure 36 was added presenting protection diodes over the Vdd power pins.

Vdd limits are not specifically specified in the datasheet, however a value of 5V is legal.

But what about [5V - Vdiode] ?   (as Vdiode can reach 0.3-0.4V even for a schottky diode)

Does when using such diodes I can not use any more my 5V supplier, and I need a different power supplier

which can guarantee Vdd is at least 5V  at the AD7656 pin?

 

Thanks

Amnon Pomerants

 

IAI

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