Automotive-grade digital isolator for harsh environments
The ADUM1285WARZ is a 2-channel, unidirectional digital isolator from Analog Devices' iCoupler family, built with magnetic coupling technology. It is rated for 3000 Vrms isolation and carries an automotive grade (AEC-Q100 qualified), making it suitable for under-hood and chassis-domain applications where galvanic isolation is required between a low-voltage control domain and a higher-voltage power domain.
With a maximum data rate of 1 Mbps, this isolator handles common serial protocols like UART, SPI at moderate clock speeds, and low-speed CAN. The 50 ns propagation delay (max) and 10 ns pulse-width distortion keep signal integrity tight enough for most sensor and actuator interfaces in automotive ECUs. If your design needs faster throughput — say 10 Mbps or higher — the ADUM1200WTRZ is a same-package alternative rated for 10 Mbps at 2500 Vrms, though it lacks the 3000 Vrms isolation this part provides.
Isolation voltage and common-mode transient immunity
The 3000 Vrms isolation rating meets basic and reinforced isolation requirements for many automotive and industrial power interfaces. The 25 kV/µs minimum common-mode transient immunity (CMTI) ensures the isolator does not glitch during fast voltage transients on the isolation barrier — a critical parameter in motor-drive and inverter applications where switching edges couple large dV/dt across the barrier.