Four-channel unidirectional isolation at 150 Mbps
The ADUM142E1BRZ is a 4-channel digital isolator from Analog Devices' iCoupler family, built around magnetic coupling technology. It delivers 150 Mbps per channel with unidirectional data flow, arranged as two channels on side 1 and two on side 2. The 3000 Vrms isolation rating covers basic insulation for industrial and medical equipment where galvanic separation of signal grounds is required.
75 kV/µs CMTI — why it matters for motor drives
Common-mode transient immunity is rated at 75 kV/µs minimum. In a variable-frequency drive or inverter stage, the fast switching edges on the high-side gate driver can inject several kV/µs across the isolation barrier. A CMTI below that threshold risks data corruption or latch-up. This part's 75 kV/µs rating gives margin for most 600 V / 1200 V IGBT switching events.
Propagation delay and pulse-width distortion
Maximum propagation delay is 13 ns in both directions, with pulse-width distortion held to 3 ns. Rise and fall times are 2.5 ns typical. For a 150 Mbps link (6.67 ns bit period), the 13 ns delay means the isolator adds roughly two bit-clock cycles of latency — fine for SPI clock rates up to 50 MHz, but worth budgeting in a closed-loop control path.
Package and footprint
Housed in a 16-pin SOIC with 3.90 mm body width (0.154 inch), the ADUM142E1BRZ uses a standard narrow SOIC footprint. No external isolated power supply is needed — the part draws its bias from the logic-side rails on each side.
Lifecycle and supply posture
ADI lists this part as Active.