Four-channel magnetic isolator for high-speed signal isolation
The ADUM141E1BRWZ is a 4-channel digital isolator from Analog Devices' iCoupler family, using magnetic coupling to provide galvanic isolation up to 3750 Vrms. It supports a data rate of 150 Mbps with propagation delays of 13 ns max and pulse-width distortion under 3 ns, making it suitable for isolating high-speed digital interfaces like SPI, UART, or CAN. With a common-mode transient immunity of 75 kV/µs, it is designed for noisy industrial environments such as motor drives, inverters, and power supplies where fast voltage transients are common. The 4-channel unidirectional configuration (3 inputs on side 1, 1 on side 2) fits designs needing three downstream signals and one feedback path.
150 Mbps data rate and timing margins
At 150 Mbps, the ADUM141E1BRWZ handles full-speed SPI clock lines, parallel data buses, and high-speed serial links without adding significant skew. The 13 ns max propagation delay (both directions) and 3 ns max pulse-width distortion mean the isolator introduces less than one clock cycle of latency at 50 MHz, which is tight enough for most control-loop feedback paths. The 2.5 ns typical rise/fall times keep signal integrity clean on short PCB traces, but you should still match trace lengths between channels to avoid skew-induced setup violations.
3750 Vrms isolation and 75 kV/µs CMTI
The 3750 Vrms isolation rating covers reinforced insulation requirements for industrial equipment per IEC 60747-5-5. The 75 kV/µs common-mode transient immunity is the spec that matters when the isolator sits across a motor-drive phase leg or a switched-mode power supply — fast voltage edges on the high side can couple through parasitic capacitance and corrupt data if the isolator's CMTI is too low. This part's 75 kV/µs minimum ensures reliable data transmission even with 1000 V/ns common-mode slew rates, which is typical for SiC and GaN gate-drive stages.
Supply flexibility and temperature range
This simplifies BOM consolidation when the MCU runs at 3.3 V and the isolated peripheral at 5 V.
Package and footprint
Housed in a 16-pin SOIC with 7.50 mm body width (0.295 inch), the ADUM141E1BRWZ uses a standard wide-body footprint common to many multi-channel isolators. The surface-mount package is compatible with reflow soldering; no exposed pad means thermal management relies on the ambient airflow and PCB copper pour. The wide-body SOIC provides adequate creepage distance for the 3750 Vrms isolation rating in most designs.
Lifecycle and compliance
It is ROHS3 compliant, with no known end-of-life notices.