The ADUM5242ARZ-RL7 is a two-channel digital isolator from the Analog Devices IsoPower and iCoupler families. What sets it apart from a plain isolator is the integrated isolated DC-DC converter — it generates a regulated output voltage on the isolated side from the input supply, so you don't need a separate isolated power module. That makes it a space-saving pick for designs where you need to pass a couple of digital signals across a safety barrier and also power a small circuit on the far side. The magnetic coupling technology handles 2500Vrms isolation, and the 1Mbps data rate covers most control and status-signal applications. The two channels are unidirectional, both oriented from Side 1 to Side 2 (0 inputs on Side 1, 2 outputs on Side 2). This matters if you need bidirectional communication — you'd need a second device for the return path.
Isolation rating and what it buys you
The 2500Vrms isolation voltage is a reinforced-grade rating for basic insulation in mains-connected industrial equipment, medical devices (non-patient-contact), and power supplies. The 25kV/µs common-mode transient immunity means the output won't glitch when a motor drive or inverter switches at high dv/dt — a common failure mode in cheaper optocoupler-based isolators. Not automotive-qualified (no AEC-Q100 in the record), but suitable for many factory-floor and instrumentation roles.
Supply rails and the iso power output
The part needs two supply domains. Side 1 (the logic input side) runs from 2.7V to 4.0V. Side 2 (the output side with the integrated iso power) needs 4.5V to 5.5V. The dual-range supply means you can interface a 3.3V microcontroller on Side 1 while Side 2 runs from a 5V rail and generates the isolated output.
Timing specs for the bench
Propagation delay is 70ns max in both directions, with a 3ns max pulse-width distortion. Rise and fall times are 2.5ns typical. That 70ns is fine for a 1Mbps data stream (1µs bit period gives plenty of margin), but if you're daisy-chaining several isolators in a signal path, the accumulated delay might matter for timing-critical loops. The 3ns PWD means the output pulse width stays close to the input — good for PWM signals where duty cycle accuracy matters.
Package and board-level fit
Housed in an 8-pin SOIC with 3.90mm body width (the narrow SOIC-8 footprint). Surface-mount only. No thermal pad on this package — dissipation is through the leads and board copper, so keep an eye on total power if you're pulling significant current from the iso power output at high ambient temperature.
Sourcing and lifecycle posture
For production BOMs, this is a low-risk line item with no imminent obsolescence concern.