FAQ

Q 

What’s the difference between the ADuM1440/41/42 and the ADuM1445/46/47?

A 

All devices in the family contain a refresh circuit to guarantee dc correctness
at power up. If no pulses are received on the secondary side of the transformer
for…

All devices in the family contain a refresh circuit to guarantee dc correctness at power up. If no pulses are received on the secondary side of the transformer for approximately 200 µs, the input side is assumed to be unpowered or nonfunctional…

Q 

Will there be dual versions of the ADuM144X family

A 

Yes, the soon to be announced ADuM1240/41/45/46 family provides a dual-channel
footprint with the same performance as the ADuM144X family. These will be
available in Q2 2014.

Q 

What is the refresh frequency of the ADuM144X family?

A 

The refresh frequency is dependent on temperature and input supply voltage, and
can range from 50 µs to115 µs over all conditions. Refer to the data sheet for
typical characteristic…

Q 

What input voltage levels are recommended?

A 

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…

Q 

I set EN1 and EN2 high to disable the internal refresh and watchdog for lowest
operating power. Is DC correctness guaranteed in this state?

A 

No, an input transition (high to low or low to high) is required to guarantee
that the ADuM144X output…

Q 

What is the glitch filter width of the ADuM144X family?

A 

Q 

we would like to use Your “Digital Isolators” (ADuM...) in our applications.
But we have an operating input/output-voltage difference of more than 2KV,
which is not supported by the “Digital Isolators”. Will You have such parts in …