ADuM1301: Default output state on power up

Document created by analog-archivist Employee on Feb 23, 2016
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What condition will be at the output of isolator ADUM1301BRW after we apply a
power if the level of a signal at the input is constant?


The output state on power up depends on the state of the inputs, enable and
VDDI, VDDO. The default state is described in table 10 on page 15 of the

There is also a watchdog timer on the chip.If the decoder receives no pulses
for more than about 5 µs,the input side is assumed to be unpowered or
nonfunctional, in which case the isolator output is forced to a default state
(see Table 10 )by the watchdog timer circuit.