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AD5440 - Pin out query

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?


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