150 Mbps isolation with 75 kV/µs CMTI — timing and noise margin
The ADUM140D1BRZ is a 4-channel, unidirectional digital isolator from the iCoupler® family, built with magnetic coupling technology. It delivers a 150 Mbps data rate with a propagation delay of 13 ns max (both directions) and pulse-width distortion held to 3 ns max. The 2.5 ns typical rise/fall time keeps the eye open for high-speed SPI, UART, or parallel bus isolation. The 75 kV/µs common-mode transient immunity rating means the part rejects fast dV/dt edges from motor drives, inverter stages, or switching supplies without corrupting the data stream — a critical spec when the isolation barrier sees several hundred volts switching at tens of kHz.
3750 Vrms isolation — what it covers and what it does not
Rated at 3750 Vrms for one minute per the basic isolation spec, this part suits reinforced insulation in mains-connected industrial equipment, medical patient-interface circuits, and motor-drive feedback paths. Note that the part does not include an integrated DC-DC converter for isolated power; the secondary side needs its own supply rail.
Four unidirectional channels — all inputs on side 1
Channel configuration is 4 inputs on side 1, 0 inputs on side 2 (4/0), meaning all four channels pass data from the primary to the secondary side. This is a fixed-direction part — no bidirectional or configurable channels. For designs needing mixed-direction isolation (e.g., SPI with MISO returning), pair this with a single-channel reverse-direction isolator or use the ADUM140D0BRZ (0/4) for the return path.
Package and temperature grade
Standard SOIC-16 footprint.