150 Mbps automotive-grade quad isolator — what it brings to the bus
The Analog Devices ADUM142E1WBRQZ-RL7 is a 4-channel, unidirectional digital isolator using iCoupler magnetic coupling technology. The part delivers a 150 Mbps data rate with 2.5 ns typical rise/fall times, which comfortably handles SPI, CAN FD, and high-speed UART links across the isolation barrier.
75 kV/µs CMTI — why it matters for motor drives and inverters
The minimum common-mode transient immunity of 75 kV/µs is the standout parameter for this isolator. In a motor-drive or inverter application, the switching node of the IGBT or SiC FET can slam the ground reference of the isolated side by hundreds of volts in nanoseconds. A CMTI rating this high means the output does not glitch or lose data when that transient hits — the data sheet guarantees it. For a 3-phase inverter running at 10 kHz PWM with 600 V DC bus, this is the difference between a clean feedback signal and random bit errors on the current-sense SPI bus.
Supply flexibility and channel assignment
The channel configuration is 2 inputs on side 1 and 2 inputs on side 2 — a 2/2 split that suits bidirectional SPI (MOSI/MISO) or two pairs of isolated digital signals. Propagation delay is 13 ns max in either direction, with pulse-width distortion held to 3 ns max, keeping the duty cycle intact for PWM or timing-sensitive signals.
Package and footprint — 16-QSOP
No isolated power is generated on-chip — the part is a pure signal isolator, so each side needs its own local supply rail.
Lifecycle and compliance
It is ROHS3 compliant. The Automotive grade implies AEC-Q100 qualification, though the specific AEC-Q100 document number is not in the record; the part is intended for production automotive programs and high-reliability industrial designs.