5000Vrms reinforced isolation — the spec that defines the application
The ADUM2400CRIZ is a 4-channel, unidirectional digital isolator from the iCoupler series, built around magnetic coupling technology. Its headline rating is 5000Vrms isolation, which puts it in the reinforced-isolation tier — the level required for safety isolation in industrial motor drives, grid-tied inverters, medical patient-contact interfaces, and any design where a fault on one side must not propagate to the user or low-voltage circuitry. The 90Mbps data rate supports most fieldbus interfaces (SPI, UART, RS-485, CAN) with margin, and the 2.5ns typical rise/fall time keeps signal integrity clean across a 16-SOIC wide-body footprint. Supply range spans 2.7V to 5.5V on each side independently, so it can bridge a 3.3V MCU domain to a 5V isolated peripheral bus without a separate level shifter.
32ns propagation delay — timing budget for the bus
Maximum propagation delay is 32ns in either direction, with pulse-width distortion held to 2ns max. That 32ns is the round-trip budget you need to account for in SPI clock-to-data timing or CAN bit sampling. The 25kV/µs minimum common-mode transient immunity means it won't glitch when a motor drive or relay bank slams the isolated ground plane — a real concern in factory-floor and EV charger designs.
16-SOIC wide-body — rework and footprint notes
The package is a 16-SOIC with 0.295-inch (7.50 mm) body width — the wide-body variant, not the narrow 3.90 mm version. The wide body gives better creepage distance for the 5000Vrms rating and more room for a hot-air rework nozzle to hit all leads without cooking adjacent parts.