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ADuM3400 & ADuM140E1 Internal ESD enhancements


I am considering latchup on the ADuM3400 and ADuM140E1.
I have two questions.

① According to AN-793, ADuM3400 has improved design of ESD enhancements.
Is this design improvement applied to the ADuM140E1?

② Does the ADuM3400 and ADuM140E1 have the transient absorbing Zener diode described in AN-793?

Best Regards