Two channels, one direction — what the 1/1 input count tells you
The ADUM2201BRWZ-RL is a two-channel digital isolator from Analog Devices' iCoupler family, using magnetic coupling to transfer signals across a 5000Vrms isolation barrier. The channel configuration is 1/1 — one input on side 1 drives one output on side 2, and the second channel mirrors that direction. That makes it a unidirectional part: data flows from side 1 to side 2 only, with no reverse channel. If your application needs bidirectional communication (e.g., a half-duplex RS-485 bus), you pair two of these or step to a part with a 2/0 or 3/1 input split.
5000Vrms — reinforced isolation without the optocoupler headache
The 5000Vrms isolation rating puts this in the reinforced insulation class, suitable for medical equipment (patient contact), industrial motor drives with high transient voltages, and grid-tied power converters where the safety standard demands a double-insulation barrier. The 25kV/µs common-mode transient immunity means the output doesn't glitch when a fast voltage step slams across the isolation gap — a failure mode that plagues optocouplers with their parasitic input-output capacitance. At 10Mbps the propagation delay maxes out at 50ns in either direction, with pulse-width distortion held to 3ns, so the timing budget for a SPI clock or a PWM signal stays predictable.
Supply flexibility — 3.3V and 5V on either side
The supply range spans 3V to 5.5V on both sides independently, so you can run a 3.3V MCU domain on side 1 and a 5V sensor interface on side 2 without a level translator. The 2.5ns typical rise/fall time keeps signal edges clean at 10Mbps, but that also means the PCB layout needs care — keep the isolation barrier clear of copper pour, and place the supply decoupling caps close to each VDD pin. The 16-SOIC wide-body package (7.50mm body width) gives the creepage distance needed to sustain the 5000Vrms rating across the board.
Active production — no end-of-life watch needed
ROHS3 compliant per the listing.