4-channel unidirectional isolator with 2500Vrms — what the ratings mean
The ADUM1402WSRWZ-RL is a 4-channel, unidirectional digital isolator from Analog Devices using magnetic coupling technology. It provides 2500Vrms isolation between input and output sides, with two channels on side 1 and two on side 2.
1Mbps data rate — timing budget for the bus
With a maximum propagation delay of 100ns (tpLH/tpHL) and pulse width distortion of 40ns, the 1Mbps data rate supports most industrial fieldbuses and automotive CAN-like interfaces. The 2.5ns typical rise/fall time keeps edge-rate-induced ringing manageable on a 16-SOIC layout. Common-mode transient immunity of 25kV/µs minimum ensures the link stays clean in motor-drive and inverter environments where fast-switching IGBTs or SiC MOSFETs generate high dV/dt.
Supply range and logic compatibility
The unidirectional channel configuration (2 inputs on side 1, 2 outputs on side 2) is typical for isolating SPI, UART, or GPIO signals. No isolated power is generated on-chip — an external isolated DC-DC or a separate supply rail is required for the secondary side.
Automotive grade and package
Listed as Automotive grade, this part is qualified for AEC-Q100 stress tests, making it suitable for production in passenger vehicles and commercial trucks. The 16-SOIC wide-body package (7.50mm body width) provides adequate creepage for 2500Vrms isolation in high-reliability designs. Surface-mount assembly is standard;.
Lifecycle and sourcing
It is ROHS3 compliant.