What the 150 Mbps data rate and 3/1 channel split mean for your isolation bus
The ADUM141D1BRZ is a 4-channel digital isolator from Analog Devices' iCoupler family, using magnetic coupling to pass signals across a 3000 Vrms isolation barrier. Three channels run from Side 1 to Side 2, and one channel runs the opposite direction — a 3/1 input split that maps naturally to isolated SPI (MOSI, MISO, SCLK, plus a CS or interrupt line) or a UART with one handshake signal. The 150 Mbps data rate handles fast serial links without bit-rate limiting; at that speed the 13 ns propagation delay and 3 ns pulse-width distortion keep timing margins tight enough for most 50 MHz SPI buses.
Supply range and temperature — where this part fits on the board
Common-mode transient immunity of 75 kV/µs minimum means it won't latch or glitch when a GaN half-bridge switches at high dv/dt — a spec worth checking if you're isolating gate-drive signals.
Package, footprint, and compliance
The 2.5 ns typical rise/fall times keep edge rates clean but call for a solid ground plane under the part to control radiated emissions. ROHS3 compliant per the listing; no isolated power output — this is a pure signal isolator, not a bias-supply part.