The question is about the ADA4939-1:
To which voltage level the exposed pad shall be connected?
Fig.53 in the datasheet indicates, that the pad is connected via 5 vias to a burried GND-Layer.
Nowhere else in the datasheet the recommended voltage level is mentioned.
Just to be sure: Can Analog Devices confirm that Fig. 53 is showing the correct voltage level connection of the exposed pad?