Automotive-grade SPI isolator with 150 Mbps throughput
The Analog Devices ADUM142E1WBRWZ-RL is a 4-channel digital isolator using iCoupler magnetic coupling technology, configured for SPI isolation with 2 channels on side 1 and 2 on side 2, all unidirectional. It delivers a 150 Mbps data rate with 13 ns typical propagation delay and 3 ns pulse-width distortion, making it suitable for high-speed SPI buses in automotive and industrial environments. The 3750 VDC isolation rating and 100 kV/µs common-mode transient immunity (CMTI) are sized for motor-drive feedback, inverter gate-drive interfaces, and battery-management communication links where fast transients and galvanic isolation are required.
125°C operating range and automotive qualification
The Automotive grade designation means it carries the AEC-Q100 qualification and PPAP documentation expected for production vehicle programs. For designs that need the same isolation performance at a lower CMTI threshold, the ADUM142E1BRZ-RL7 (75 kV/µs) is a commercial-grade alternative, but the WBRWZ suffix on this seed part is the one to specify when the BOM calls for automotive traceability.
Supply range and channel direction for SPI buses
The 2/2 input split (two inputs on side 1, two on side 2) maps directly to a standard SPI interface: one channel for SCK, one for MOSI on the controller side, and two for MISO and a chip-select or interrupt on the peripheral side. Rise and fall times are 2.5 ns typical, so signal integrity on the 16-SOIC footprint needs attention to trace impedance and decoupling — the 7.50 mm wide body gives good pin-to-pin creepage for the 3750 VDC isolation rating.