Six-channel isolation with asymmetric direction
The Analog Devices ADUM161N1BRZ is a 6-channel digital isolator using iCoupler magnetic coupling technology, rated for 3000 Vrms isolation in a 16-SOIC package. Its channel configuration is five inputs on side 1 and one input on side 2 — an asymmetric split that suits applications like isolated SPI (SCLK, MOSI, MISO, CS plus a control signal out, with one feedback line back) or multi-sensor data acquisition where the bulk of signals flow one direction. The 150 Mbps data rate handles most industrial serial links comfortably, and the 75 kV/µs common-mode transient immunity keeps data intact across the barrier when motor drives or inverters slam the ground reference around.
What the 3000 Vrms and 75 kV/µs ratings mean on the board
The 3000 Vrms isolation rating qualifies this part for basic insulation in mains-connected industrial equipment per IEC 60747-17. The 75 kV/µs common-mode transient immunity (CMTI) is the spec that matters when you place this isolator between a noisy power stage and a sensitive controller — fast SiC or GaN switching edges can couple tens of kV/µs across the barrier, and if the isolator's CMTI is too low, data corrupts or the output latches. At 75 kV/µs minimum, this part handles the switching speeds of modern wide-bandgap power stages without extra filtering.
Supply flexibility and timing margins
Propagation delay is 13 ns max in either direction, with 4.5 ns max pulse-width distortion — tight enough for 150 Mbps NRZ data with enough margin for a clean eye at the receiver. Rise and fall times are 2.5 ns typical, which keeps edge-rate-induced ringing manageable on short SOIC traces.
Lifecycle and sourcing posture
No official replacement or second-source alternate is recorded, but the iCoupler family has broad pin-compatible density options if a design needs fewer channels or a different direction split.