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Interface and Isolation

Q&A Adum2250 immunity issue

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Adum2250 immunity issue

travis$ over 5 years ago

Hello,

I am facing problems with Adum2250 I²C isolator

I my application, we have electromechanical relays that make Adum2250 internal detector to trig when the relay commutes

I have attached the waveforms :

(BLUE) = Clock side 1 (5V)

(PINK) = Clock Side 2 (3,3V)

(YELLOW) = Relay output (230Vac - 50Hz)

The distance between the relay and the chip is around 3cm

Question : what would you suggest to fix the problem ?

attachments.zip

Top Replies

ADIApproved over 5 years ago +1

Hello Travis,

The ADuM2250 is based on the oldest iCoupler encoding scheme. It is more sensitive to disterbences on the power supply than the newer iCouplers. So I would approach this by filtering the power…

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0 EZAdministrator over 3 years ago

This question has been assumed as answered either offline via email or with a multi-part answer. This question has now been closed out. If you have an inquiry related to this topic please post a new question in the applicable product forum.

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0 EZAdministrator over 3 years ago

This question has been assumed as answered either offline via email or with a multi-part answer. This question has now been closed out. If you have an inquiry related to this topic please post a new question in the applicable product forum.

Thank you,
EZ Admin
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