The ADUM1301ARWZ is a 3-channel unidirectional digital isolator from Analog Devices' iCoupler family, built around magnetic coupling technology. It provides 2500Vrms galvanic isolation between two power domains, with a 2/1 input-to-output channel split (two inputs on side 1, one on side 2). The part operates from a 2.7V to 5.5V supply on either side, making it straightforward to interface 3.3V logic with a 5V domain or vice versa. Data rate is rated at 1Mbps, with typical rise/fall times of 2.5ns and maximum propagation delay of 100ns in either direction — clean enough for slow serial buses like UART, SPI at lower speeds, or general-purpose isolated GPIO.
25kV/µs CMTI — why it matters for motor drives and inverters
Common-mode transient immunity (CMTI) is rated at a minimum 25kV/µs. In a motor-drive or inverter application, the fast switching edges on the high-voltage side couple common-mode noise across the isolation barrier. A CMTI of 25kV/µs means the part will not latch up or corrupt data when those transients hit — a spec that separates a robust industrial isolator from a marginal one. Pulse-width distortion is held to 40ns max, which keeps the duty-cycle error small enough for PWM capture or timing-sensitive signals.
Temperature range and package — industrial fit
The 16-SOIC wide-body package (7.50mm width) provides the creepage distance needed for 2500Vrms isolation in a surface-mount footprint. No isolated power converter is integrated — the part is a pure signal isolator, so each side needs its own local supply rail.