The ADUM1245ARSZ is a two-channel general-purpose digital isolator from the iCoupler® family, using magnetic coupling to transfer signals across a 3750 Vrms isolation barrier — enough for reinforced insulation in industrial power supplies, motor drives, and medical equipment where galvanic isolation is a safety requirement. The 2 Mbps data rate handles GPIO, SPI clock, UART, and control signals comfortably, but it will bottleneck full-speed USB or 100 Mbps Ethernet — match the channel speed to your bus before committing the BOM. Common-mode transient immunity of 25 kV/µs means the output won't glitch when a switching MOSFET or IGBT dumps a fast dV/dt edge across the barrier — critical for motor-drive inverter stages and isolated DC-DC converters.
Housed in a 20-pin SSOP (5.30 mm body width), the surface-mount footprint is standard for industrial control cards and fits alongside other SSOP-20 devices without a layout change. The two channels are unidirectional and both face the same direction (2 inputs on side 1, 0 on side 2) — this part isolates downstream signals from the controller; it won't handle bidirectional data like an RS-485 transceiver without external direction control.
Lifecycle and compliance
ROHS3 compliant, so it passes European and California RoHS thresholds without an exemption.