150 Mbps, 3-channel, 3750 Vrms – the iCoupler that bridges fast logic
The ADUM131D0BRWZ is a 3-channel digital isolator from Analog Devices' iCoupler family, built around magnetic coupling technology. It pushes 150 Mbps on each channel with a typical 13 ns propagation delay and 3 ns pulse-width distortion – fast enough for SPI, UART, and CAN FD links without adding jitter margin problems. The unidirectional channel layout gives you two forward and one reverse path, which maps directly to a three-wire SPI bus (SCLK, MOSI, /CS in; MISO out) or a UART with flow control.
3750 Vrms isolation and 75 kV/µs CMTI – where the margin lives
Rated at 3750 Vrms isolation, this part meets the reinforced-isolation bar for industrial motor drives, medical patient-contact equipment, and grid-tied power converters. The common-mode transient immunity of 75 kV/µs is the spec that matters when a GaN or SiC MOSFET switches at high dV/dt – without it the isolator's output can glitch, corrupting data or tripping a fault latch.
That saves a buffer IC and two supply rails on the board. The 16-pin SOIC wide-body (7.50 mm width) gives creepage distance for the isolation rating – surface-mount, no isolated power on chip, so you still need a separate DC-DC if the secondary side runs from a different supply domain.
The iCoupler series has broad second-source overlap within the family, but this exact channel count and direction (2/1) is specific – if you need a drop-in alternative, check the ADUM131D0BRZ (same pinout, same isolation, slightly different timing spec) as a cross-shop candidate.