Four-channel digital isolator with 5000 Vrms reinforced isolation
The Analog Devices ADUM241E1WBRWZ is a 4-channel, unidirectional digital isolator from the iCoupler family, built on magnetic coupling technology. It provides 5000 Vrms isolation between input and output, with three channels on side 1 and one channel on side 2 — a 3/1 input configuration that suits applications where the majority of signals cross the barrier in one direction.
75 kV/µs CMTI and 150 Mbps — what they mean for a motor-drive or inverter BOM
The headline rating here is the common-mode transient immunity: 75 kV/µs minimum. In a motor-drive or traction inverter, the switching node on the high-voltage side slews at tens of kV/µs. If the isolator's CMTI is too low, that fast edge couples across the barrier as a data error — the output sees a false pulse. At 75 kV/µs, this part holds data integrity through the worst SiC or GaN switching edges found in automotive traction drives or industrial servo drives. The 150 Mbps data rate supports SPI clock rates up to that speed, CAN FD at 5 Mbps or 8 Mbps with margin, and parallel bus isolation at moderate throughput. Propagation delay is 13 ns max, symmetrical between low-to-high and high-to-low transitions, with pulse-width distortion held to 3 ns max — tight enough to avoid duty-cycle distortion in PWM signal paths.
No external level translator is needed when the MCU runs at 1.8 V and the isolated peripheral at 3.3 V. The wide range also helps during power sequencing — the part starts up cleanly as long as the supply on either side is within spec. Rise and fall times are 2.5 ns typical, keeping signal edges clean at 150 Mbps without excessive ringing.
Package and footprint: 16-SOIC wide-body (7.50 mm width)
Housed in a 16-SOIC wide-body package with 7.50 mm body width and 0.295 inch lead pitch, this is the standard footprint for reinforced isolation in an SOIC form factor. The wide-body spacing provides the creepage and clearance needed to maintain the 5000 Vrms isolation rating in the end assembly. Surface-mount only — no through-hole option. No isolated power output on this variant (the '' suffix indicates no integrated DC-DC converter), so the secondary side needs its own supply rail.