The ADUM2201BRIZ is a 2-channel, unidirectional digital isolator from Analog Devices' iCoupler series, built around magnetic coupling. Its headline rating is 5000 Vrms isolation — enough to separate a low-voltage control side from a 400 V motor-drive power stage or a medical patient-connected circuit, with a 1 mm creepage/clearance target in the 16-SOIC wide-body package. The 10 Mbps data rate handles SPI, UART, and general-purpose logic links without stretching the timing budget.
25 kV/µs CMTI — why it matters for motor drives and inverters
Common-mode transient immunity is rated at 25 kV/µs minimum. In a motor-drive or inverter application, fast switching edges on the high-voltage side couple across the isolation barrier as common-mode noise. If the isolator's CMTI is too low, those edges can glitch the output data. 25 kV/µs is a solid industrial-grade figure — it keeps the data path clean through the worst switching transients you will see on a 600 V IGBT phase leg.
Channel count and direction — 1/1 split
Two channels, one in each direction. That is the classic configuration for an isolated SPI bus (MISO on one side, MOSI on the other) or a full-duplex UART link. The sibling ADUM2200BRWZ gives you two forward channels and zero reverse — useful if you only need to isolate a single-direction signal like a PWM command. The ADUM2402BRIZ packs four channels with a 2/2 split for wider parallel interfaces. For a two-wire bidirectional link, the 1/1 split here is the right fit.