What this digital isolator does in the assembly
The Analog Devices ADUM1400BRWZ-RL is a general-purpose digital isolator from the iCoupler series, using magnetic coupling to transfer digital signals across a 2500Vrms isolation barrier. It provides four unidirectional channels, all configured with inputs on side 1 and outputs on side 2, making it a straightforward drop-in for isolating SPI, GPIO, or other unidirectional digital lines where the data direction is fixed. The part operates from a 2.7V to 5.5V supply on each side, so it can bridge logic levels between a 3.3V MCU and a 5V peripheral without an extra level shifter.
At 10Mbps, the 50ns max propagation delay and 3ns max pulse-width distortion keep signal edges clean. The 25kV/µs common-mode transient immunity maintains output validity through fast voltage transients.
The 16-SOIC wide body package supports the 2500Vrms isolation rating.