can you say me the max. value of external RF field and magnetic field immunity for error-free operation?
The ADuM140x has been E-field tested for Radiated Electromagnetic field per AEC-Q100. The test was conducted from 150kHz to 1GHz with a 50% AM modulation @ 1kHz, up to 300V/m without an upset.
Magnetic field immunity is discussed starting on page 27 of the data sheet. The maximum magnetic flux density and maximum current at various distances from the isolator are derived. iCoupler digital isolators are very robust in the presence of magnetic fields. For example, a conductor carrying a 500A alternating current at 1MHz would need to be 5mm from the device to create an upset event.
Thanks. You are great!
Have you done this test with an oscillating current of 500A at 1MHz?
The curves you show on page 27 of the data sheet suggest that at 1kHz the isolator can withstand magnetic fields of amplitude up to 30T (300kGauss). Thirty Tesla!!! Are you serious? We are worried about the perturbation of a static field of 0.1T. Can you really seriously categorically guarantee that your circuit will work above 20T of ambient field?
Have you done tests with modest (~0.1T) static magnetic fields?
We have tested the ADUM1280 to the IEC 61000-4-8 magnetic immunity standard. The ADuM128x is very similar in design to the ADuM140x. The IEC test uses a 60 Hz continuous field generated by a Helmholtz coil up to 1000 A/m, which corresponds to 0.001 T. Unfortunately this is the largest field that could be generated at the EMC lab.
The curve in the data sheet (and above) is based on the voltage disturbance that would be created within a coil by an external field. The immunity is very high because the coils are physically small and do not have a large number of turns.
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