Six-channel digital isolator for mixed-voltage domains
The Analog Devices ADUM160N1BRZ-RL7 is a six-channel, unidirectional digital isolator using magnetic coupling to transfer logic signals across a 3000Vrms isolation barrier. It supports data rates up to 150Mbps with typical propagation delays of 13ns and pulse-width distortion under 4.5ns, making it suitable for isolating high-speed interfaces like SPI, UART, and GPIO lines in systems where ground potential differences or noise immunity are critical. The wide supply range from 1.7V to 5.5V allows it to bridge different voltage domains on the same IC, and the 75kV/µs minimum common-mode transient immunity ensures reliable operation in motor drives, inverters, and industrial power converters where high dV/dt switching is present.
What the 150Mbps data rate and 75kV/µs CMTI mean for your design
At 150Mbps, this isolator can handle full-speed SPI clocking up to 75MHz (assuming double-edge sampling) or multiple parallel GPIO signals without introducing timing errors. The 13ns max propagation delay and 2.5ns rise/fall times leave enough margin for most digital buses running at moderate clock rates. The 75kV/µs minimum CMTI is the headline spec for harsh environments: in a motor drive or solar inverter, fast-switching IGBTs or SiC MOSFETs can inject common-mode transients that corrupt data across a slow isolator. This part's CMTI rating means it maintains signal integrity even with several kilovolts per microsecond of common-mode slew — a critical parameter for passing IEC 61000-4-4 burst immunity tests.
Active lifecycle and supply posture
For BOM resilience, the ADUM160N family includes multiple channel and direction configurations (e.g., ADUM160N0BRZ with 0/6 direction split) that share the same 16-SOIC footprint, providing a drop-in alternative if channel-direction requirements shift during a design revision.
Package and thermal handling
The package does not have an exposed thermal pad, so heat dissipation relies on the leadframe and PCB copper planes. For high-temperature environments up to 125°C, ensure adequate airflow or copper pour on the adjacent layers to keep junction temperature within limits. The tape-and-reel variant (RL7 suffix) is the standard ordering option for volume production.