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Why does ADUM6401 power output latch low with power interrupt?

Question asked by PaulB8904 on Sep 8, 2011
Latest reply on Sep 12, 2016 by bkennedy

I'm using an ADUM6401CRWZ in conjunction with an ADUM1201WTRZ for isolation to an AD7714YRU A/D circuit.  From a cold start everything comes up no problem but if the main DC power is cycled off/on, 9 times out of 10, the power output of the 6401 will latch low.  Once this happens It takes a longer off cycle to recover.  This is a problem I'm having in the field particularly in startups where power is cycled often.

 

I'm using an ADUM5401ARWZ on a RS485 without any of these issues.

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