The GNDA and VOA pins of the ADuM3223ARZ always output a high level.

In the absence of an input signal to the DH pin, regardless of whether DGND and PGND are common, regardless of DISABLE=0 or DISABLE=1, both VOA and GNDA have an output voltage of approximately 11.5V. Is this a normal phenomenon?

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The 11.5V output of VOA and GNDA is measured with reference to PGND.
[edited by: jianzechen at 3:51 AM (GMT 0) on 10 Oct 2019]