ADuM144x Low Power Digital Isolators:  What input voltage levels are recommended?

Document created by rdowning on Nov 18, 2013
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The ADuM144x family contains Schmitt trigger input buffers, which provide hysteresis for noise rejection.  During an input transition a Schmitt trigger will introduce a small shoot-through current while the input is near the mid-supply level.  In devices with higher average power dissipation this not noticeable, but in ultra-low power parts like the ADuM144x it can be large compared to the average supply current.  It is recommended that the inputs be driven with 0.5 V of VDD and GND to achieve the lowest power dissipation.

 

For more information on the ADuM144x family of low power digital isolators, please visit:  www.analog.com/ADuM144x

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