The ADUM140D0BRZ is a 4-channel, unidirectional digital isolator from Analog Devices' iCoupler series, built on magnetic coupling technology. It delivers 150 Mbps per channel with 3750 Vrms isolation, making it a fit for high-speed signal isolation in industrial fieldbuses, motor-drive feedback, and isolated SPI/UART links.
75 kV/µs CMTI — why it matters for motor drives and inverters
Common-mode transient immunity is rated at 75 kV/µs minimum. In a motor-drive or inverter application, the switching node slews at tens of kV/µs; a CMTI below that threshold can couple the transient across the barrier and corrupt the data. This part's 75 kV/µs rating gives margin for most SiC and GaN gate-drive stages running at moderate switching speeds.
Propagation delay and pulse-width distortion — timing budget for high-speed links
Maximum propagation delay is 13 ns in both directions, with pulse-width distortion capped at 3 ns. Budget for it in the link timing closure.
4/0 channel configuration — all inputs on one side
The channel assignment is 4 inputs on Side 1, 0 on Side 2 — all four channels run in the same direction. That suits unidirectional data paths like SPI (SCLK, MOSI, CS, and a fourth signal) or parallel control lines from a controller to a peripheral. For bidirectional links you would need a part with channels in both directions, such as the ADUM140D1BRZ (3/1 split) or a two-device solution.
Package and supply — design-in notes
Housed in a 16-SOIC narrow-body (3.90 mm width) package, surface-mount. No isolated power output — each side needs its own supply rail.