Four-channel unidirectional isolation at 2 Mbps
The Analog Devices ADUM1445ARQZ-RL7 is a quad-channel digital isolator from the iCoupler family using magnetic coupling technology. All four channels are unidirectional and oriented from Side 1 to Side 2 — meaning every input sits on one side of the isolation barrier and every output on the other, with no reverse-direction or bidirectional channel. This matters for signal routing: you cannot use a channel to send feedback or handshake signals back across the barrier without an external isolator or level shifter. Rated for 2500Vrms isolation voltage, the part fits applications requiring basic isolation. The 2Mbps data rate handles GPIO isolation, slow SPI, UART, and status-signal crossing.
Package and mounting
Maximum propagation delay is 180 ns in both directions, with pulse-width distortion held to 8 ns max. The 2 ns typical rise/fall time keeps edge rates clean. Common-mode transient immunity is specified at 25 kV/µs minimum. That is the spec that matters when the isolator sits between a microcontroller and a gate-driver on a switching power stage: fast dv/dt events at the switching node must not glitch the logic state on the other side. At 25 kV/µs, this part handles the edge rates you see in IGBT and SiC MOSFET switching at moderate bus voltages.
Package and supply rails
Housed in a 16-lead QSOP (the supplier device package) which is the same footprint as a standard 16-SSOP — 3.90 mm body width. The supply range is 2.25 V to 3.6 V on both sides, so it runs from a single 3.3 V or 2.5 V rail without needing a separate regulator for each side. No internal isolated DC-DC converter; you supply power to both sides independently.