The ADI ADUM2400ARWZ-RL is a 4-channel, unidirectional digital isolator from the iCoupler family, built around magnetic coupling technology. It delivers 5000Vrms of galvanic isolation across a 16-SOIC package, with a 1Mbps data rate and a 2.7V to 5.5V supply range. The 4 channels all run from side 1 to side 2 — there is no reverse-direction channel — so this part is a straight drop for isolating four digital signals where the data flows one way, like SPI signals, GPIOs, or a parallel control bus.
1 Mbps data rate and 100 ns propagation delay — timing budget check
At 1 Mbps, the maximum propagation delay is 100 ns in either direction, with a pulse-width distortion of 40 ns max. That 100 ns one-way delay adds up fast in a daisy-chained SPI bus or a feedback loop — budget it into your timing closure. The 2.5 ns typical rise/fall time is fast enough for 1 Mbps but won't create excessive ringing if the trace length is kept under a few inches. The common-mode transient immunity of 25 kV/µs minimum means this part handles noisy environments like motor drives without corrupting the data across the barrier.