Channel direction — picking the right variant
With a 4/0 input configuration, all four channels on the ADUM6400ARWZ drive from Side 1 to Side 2. If your design needs bidirectional communication or more inputs on the secondary side, the family offers the ADUM6402ARWZ (2/2 split) and ADUM6403ARWZ (1/3 split) — same package, same isolation, same power output, just different channel direction counts. The pinout is consistent across the ADUM6400x variants, so swapping between them is a BOM-line change, not a board respin.
Isolation and transient immunity
The 5000 Vrms isolation rating covers reinforced-grade separation, suitable for medical patient-contact circuits, motor-drive phase-to-logic isolation, and grid-tied inverter communication.