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Interface and Isolation
Interface and Isolation
Documents ADuM iCouplers immunity to magnetic fields
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  • INTERFACE AND ISOLATION SUPPORT COMMUNITY
  • Tags List (Interface & Isolation)
  • +General: FAQ
  • +AD5700: FAQ
  • +ADG324x: FAQ
  • +ADM2687: FAQ
  • +ADN4695E: FAQ
  • +ADuM1100: FAQ
  • +ADUM1200: FAQ
  • +ADuM1201: FAQ
  • +ADuM1230: FAQ
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  • +ADuM1251: FAQ
  • +ADUM1300: FAQ
  • +ADuM1301: FAQ
  • -ADUM1400: FAQ
    • ADuM iCoupler: what is the inductance value of the internal coils?
    • ADuM iCouplers immunity to magnetic fields
    • ADuM1400
    • ADuM1400: Absolute maximum ratings
    • ADUM1400: maximum input rise time & input/output protection
    • ADuM1400_ UL flammability rating
    • ADuM: Are iCoupler products sensitive to external magnetic fields?
    • ADuM: Can you explain in more detail the DC correctness paragraph in datasheet?
    • ADUM: difference between ADuM1402ARWZ and ADuM1402WSRWZ
    • ADuM: Internal overvoltage protection
    • UL flammability ratings
  • +ADUM1401: FAQ
  • +ADuM1402: FAQ
  • +ADuM1420: FAQ
  • +ADuM1440: FAQ
  • +ADuM1441: FAQ
  • +ADuM144x: FAQ
  • +ADuM2400: FAQ
  • +ADuM2401: FAQ
  • +ADuM2402: FAQ
  • +ADUM3070: FAQ
  • +ADuM3160: FAQ
  • +ADuM3190: FAQ
  • +ADuM3201: FAQ
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  • +ADuM3221: FAQ
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ADuM iCouplers immunity to magnetic fields

Q 

I would like to know more about the iCouplers immunity to magnetic fields

 

A 

The magnetic immunity is described at length in many of the ADuM datasheets for
example ADuM2401 pages 20 and 21.  Magnetic fields can affect the performance
of the AduM but it is  unlikely to be an issue in most applications. The loop
area of the inductor used is incredibly small and the distance between the
coils is also very small. For example, a magnetic field of 100kHz of strength
2kGauss would not be enough to false trigger the receiving coil. The datasheet
for the ADuM2401 does some extensive analysis and curves are shown for magnetic
field strength vs. frequency (see Fig. 19). If you are concerned about the
presence of any magnetic fields, you should find the high frequency components
of magnetic field present along with the flux density at the iCoupler location
and verify that it is below the interference limit as shown in the data sheet.

(See also iCoupler FAQ on iCoupler homepage. )

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