Why this isolator exists for your BOM
The ADUM120N0WBRZ is a two-channel, unidirectional digital isolator from Analog Devices' Automotive series, built with iCoupler magnetic coupling technology. It delivers 150Mbps data rate across a 3000Vrms isolation barrier, with a wide supply range of 1.8V to 5.5V.
The 3000Vrms isolation rating provides basic or reinforced insulation for 250Vrms working voltage systems, common in automotive 12V/48V and industrial 24V/48V domains. The 100kV/µs common-mode transient immunity (CMTI) is the spec that matters when this isolator sits between a microcontroller and a gate driver on a motor-drive or inverter board — fast dV/dt events from switching power stages can otherwise couple across the barrier and corrupt data. With a 13ns max propagation delay and 3ns pulse-width distortion, the part maintains timing margin for high-speed SPI or CAN FD links.
Automotive qualification and lifecycle
The Automotive series designation indicates AEC-Q100 qualification, which is the standard for automotive-grade ICs used in chassis, powertrain, and body electronics.