Four-channel magnetic isolator with 5 kVrms barrier
The ADUM2401ARWZ-RL is a 4-channel, unidirectional digital isolator from Analog Devices' iCoupler series, built around magnetic coupling technology. It provides 5000Vrms isolation between two supply domains (2.7V to 5.5V on each side) and supports a data rate of 1Mbps. Three of the four channels are directed from Side 1 to Side 2, with one channel going the opposite direction — a 3/1 split that suits applications like isolated SPI or UART where the bulk of traffic flows one way.
What the 1 Mbps data rate and 100 ns propagation delay mean for your bus
With a maximum propagation delay of 100 ns (tpLH / tpHL) and pulse-width distortion limited to 40 ns, this part comfortably handles 1 Mbps signaling — think isolated UART at 115200 baud or a slow SPI bus up to 1 MHz. The 2.5 ns typical rise/fall time keeps edges clean enough for most logic families at this speed. If your design needs to push past 1 Mbps, the iCoupler family includes higher-rate variants; at 1 Mbps and below, the ADUM2401ARWZ-RL is a cost-effective choice with generous timing margin.
25 kV/µs common-mode transient immunity — why it matters for motor drives and inverters
The minimum common-mode transient immunity (CMTI) of 25 kV/µs means this isolator can reject fast voltage spikes that couple across the isolation barrier — exactly what happens in a motor-drive or inverter phase-leg where the switching node slews thousands of volts per microsecond. If the CMTI is too low, those transients can glitch the output data. At 25 kV/µs, the ADUM2401ARWZ-RL is rated for industrial drives, solar inverters, and similar high-dV/dt environments without needing external filtering.
Supply range and 5V operation
Yes, the ADUM2401ARWZ-RL supports 5V supply operation — the supply range is 2.7V to 5.5V on both sides, so you can run the primary side at 3.3V and the secondary at 5V, or both at 5V. This makes it drop-in compatible with 5V logic systems (legacy PLC I/O, 5V microcontrollers) while also working in 3.3V or mixed-voltage designs. No level-shifting is needed between the two domains as long as each stays within its own supply rail.
Package and rework considerations
The 16-SOIC wide-body (7.50 mm width) is a rework-friendly package — standard hot-air station with a fine nozzle lifts it cleanly if you preheat the board to 100°C. The 1.27 mm pitch gives good clearance for probe points and inspection. No exposed pad, so no thermal-via stencil alignment worries. MSL 3 per the iCoupler family — bake before reflow if the moisture-barrier bag has been open longer than the floor-life window.