5000Vrms isolation in a 16-SOIC — what it buys you
The ADUM2402BRIZ is a 4-channel, unidirectional digital isolator from the iCoupler family, built with magnetic coupling technology. Data rate is rated at 10Mbps, which comfortably handles most serial protocols up to full-speed SPI without timing margin issues. Propagation delay is 50ns max (both directions), and pulse-width distortion holds to 3ns max — tight enough for synchronous interfaces where skew between channels matters. Supply voltage spans 2.7V to 5.5V on both sides, so it can bridge 3.3V and 5V logic domains without a separate level shifter. The wide range also helps during power-up sequencing: either side can come up first without latch-up or excessive current draw.
25kV/µs CMTI — why it matters for motor drives and inverters
In a variable-frequency drive, the IGBT switching edges can slam several hundred volts across the isolation barrier in a few nanoseconds. If the isolator's CMTI is too low, those edges couple through as data errors or latch-up. At 25kV/µs the ADUM2402BRIZ handles the typical 600V/µs to 1500V/µs transients in industrial drives with margin to spare. Rise and fall times are 2.5ns typical — fast enough to preserve signal integrity at 10Mbps but not so fast that they radiate excessively.
Channel configuration and temperature range
Four unidirectional channels are arranged as two inputs on side 1 and two inputs on side 2. That split suits half-duplex interfaces (e.g., RS-485 with separate DE and RE) or mixed-direction sensor isolation where a few signals need to cross the barrier in each direction. No isolated power is integrated — each side needs its own supply rail.