It integrates an isolated DC-DC converter on-chip, so you get signal isolation and a regulated output power rail from a single 16-SOIC package — no external transformer or separate isolated supply module needed. Rated for 5000Vrms isolation and 25Mbps data rate, it fits applications like industrial fieldbus isolation, motor-drive interface, medical patient-connect circuits, and any board where you need to pass digital signals across a safety barrier without adding a second power converter.
It means this part can sit on a 240VAC line side and talk to a low-voltage controller without compromising safety — think VFD control signals, PLC I/O modules, or isolated sensor interfaces. The 25Mbps data rate handles SPI clocks, UART streams, and most parallel GPIO isolation cleanly. Propagation delay is 60ns max (both edges), and pulse-width distortion stays under 6ns, so timing margins for a 10MHz SPI bus are comfortable.
Integrated isolated power — no external transformer needed
The IsoPower® block inside the ADUM6400CRWZ generates a regulated output voltage on the isolated side from the 3V to 5.5V input supply. That means you do not need a separate isolated DC-DC module, a flyback transformer, or an extra regulator — the part itself provides the isolated power rail. The four channels are all unidirectional and all on the same side (inputs side 1 / side 2 = 4/0), so this variant is set up for data flowing from the primary to the isolated side. For bidirectional or mixed-direction isolation, look at the ADUM6402 or ADUM6403 variants in the same package.
ROHS3 compliant.