Two-channel isolation for low-voltage domains
The ADUM1241ARZ is a two-channel digital isolator from Analog Devices' iCoupler series, built around magnetic coupling technology. The 2.25V to 3.6V supply range means this part lives on the low-voltage side only; it won't tolerate a 5V rail without a regulator.
2 Mbps data rate and timing margins
Rated for 2Mbps, the ADUM1241ARZ handles 1 MHz clock rates and typical 115.2 kbps UART traffic with margin. Propagation delay maxes at 180ns each direction, and pulse-width distortion stays under 8ns — tight enough that a 500 ns SPI half-period won't collapse on you. The 2ns typical rise/fall edges are fast for an isolator; keep the trace short to the receiver or the edge rate will ring.
25 kV/µs CMTI — built for noisy environments
Common-mode transient immunity is rated at 25kV/µs minimum. That's the spec that matters when this isolator sits between a 48V industrial bus or a motor-drive phase and a 3.3V controller — fast voltage transients across the isolation barrier won't glitch the data.
Package and storage notes
Supplied in tube, 8-SOIC narrow-body (3.90 mm width). Surface-mount only. No isolated power output — this is a pure signal isolator; the load side needs its own supply rail. MSL rating is not in the record, but standard SOIC-8 is typically MSL 1 or 2; still, store the reels dry if the tube seal is broken.