AD5440 - Pin out query

Q

The AD5440 datasheet Figure 5. Pin Configuration 24-Lead TSSOP (RU-24) shows
that pins 17 and 18 are NC. Can these two pins be connected to DGND without
causing an IC malfunction?

A

These two Pins 17 and 18 are not internally connected.
So they can be connected to DGND without causing any malfunction.