Five channels, 150 Mbps, 3 kV isolation — what this iCoupler brings to the BOM
The ADUM152N1BRZ-RL7 is a 5-channel unidirectional digital isolator from Analog Devices' iCoupler series, built on magnetic coupling technology. It delivers 150Mbps data rate across each channel with 3000Vrms isolation, making it a fit for breaking ground loops and providing safety isolation in industrial fieldbus, motor-drive interfaces, and isolated SPI/UART links. The 3/2 input/output split (three channels on side 1, two on side 2) suits applications like isolated ADC readback where the data direction is fixed.
75 kV/µs CMTI — the number that matters in noisy environments
Common-mode transient immunity of 75kV/µs (minimum) is the spec that separates this part from older optocoupler-based isolators. In a motor-drive or inverter stage where SiC or GaN switches generate switching edges with dv/dt exceeding 50 kV/µs, a lower CMTI part can latch up or corrupt the output. This rating means the ADUM152N1BRZ-RL7 holds data integrity across the barrier through those fast transients. The 13ns propagation delay (max, both directions) and 4.5ns pulse-width distortion keep timing jitter tight enough for 150 Mbps NRZ signaling.
Package and supply — the layout constraints
Housed in a 16-SOIC (3.90mm width) package, this is a surface-mount part with the standard SOIC-16 footprint. Supply voltage spans 1.7V to 5.5V on both sides, which means it can bridge a 1.8V MCU domain on side 1 to a 5V peripheral on side 2 without a level shifter. No isolated power is provided internally — each side needs its own supply rail.