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Low Impedance at Input from ADuM3224WCRZ

Question asked by mps. on Mar 3, 2015
Latest reply on Mar 3, 2015 by RSchnell


I have 2 ICs of the type ADuM3224WCRZ in use. During the commissioning I realized, that each IC has one input which has a low impedance (ohmic resistance between input and GND: approx. 100 ohm respectively approx. 300 ohm). The other input has a resistance about 500kOhm which looks fine for me.

Is there a typical problem known which results in low impedance at the input side?

Thank you and kind regards,