Question
I have used an ADuM241D0BRWZ in a design where Vdd1 = 5v and Vdd2 = 3v3. Itarose during verification of the design that there are no cases in theelectrical characteristics section of the datasheet outlined for when Vdd1 !=Vdd2.
Can you please confirm that this will be ok and will carry out the logic leveltranslation as intended?
Answer
For a mixed supply mode like you are using where the supply voltages areVdd1=5V and Vdd2=3.3V, use the table 2 for VDD1 = 5V for IDD1, and the table 4for VDD2 = 3.3V for IDD2. Note, since the ADuM24x has the widest range ofsupply voltages from 1.7V to 5.5V, with 4 voltage tables, 5V 3.3V, 2.5V and1.8V, adding mixed mode tests was not included.