Four-channel unidirectional isolation at 10 Mbps
All four channels are unidirectional and oriented with inputs on side 1, making it a straightforward fit for isolating a 4-bit parallel bus or four independent digital signals where the data flows in one direction. The 10 Mbps data rate covers common interfaces like SPI (up to 10 MHz clock), UART, and general-purpose GPIO isolation without stretching the timing budget.
25 kV/µs transient immunity — keeps data clean in noisy environments
A minimum common-mode transient immunity of 25 kV/µs means the ADUM3400BRWZ can reject fast voltage spikes between its ground domains — the kind of noise you get from a switching MOSFET in a motor drive, an inverter leg, or a flyback converter. If the isolation barrier sees a 25 kV/µs or slower common-mode step, the output stays valid. That spec is the difference between a clean data stream and bit errors on the factory floor.
Propagation delay and pulse-width distortion
Maximum propagation delay is 50 ns in either direction, and pulse-width distortion is held to 3 ns max. For a 10 Mbps signal with a 100 ns bit period, 50 ns of delay is half a bit time — enough to matter if you are daisy-chaining multiple isolators in a timing-critical path. The 3 ns pulse-width distortion means the on and off delays are closely matched, so duty cycle is preserved within a few percent at 10 Mbps. Rise and fall times are a typical 2.5 ns, keeping the edges sharp enough for clean clock recovery.
The wide-body SOIC-16 package provides the creepage distance needed to maintain 2500 Vrms isolation in high-humidity or polluted conditions.
Active production and compliance
No lead-free exemption issues to track for a long-life BOM.