Two-channel unidirectional isolator — what the 2/0 input count means for your signal map
Both channels run from side 1 to side 2 only (2 inputs on side 1, 0 on side 2), so this part handles two forward-direction signals — data, control, or fault bits — but cannot carry a reverse path without a second device or a bidirectional variant. The unidirectional channel type means you plan the signal flow before laying out the board: anything that needs to come back across the barrier needs a separate isolator or a part with side-2 inputs.
1Mbps data rate and 475ns propagation delay — timing budget for control loops
At 1Mbps the ISO7220ADR handles SPI clock rates up to 1 MHz, UART at 115200 baud with margin, and general-purpose GPIO isolation for slow-to-moderate-speed signals. The 475ns max propagation delay (tpLH / tpHL) adds just under a microsecond of latency through the barrier — fine for most sensor readouts and status feedback, but worth checking against a fast fault latch or a current-regulation loop that expects an answer inside 200 ns.
25kV/µs CMTI — why this part suits motor drives and inverter environments
Fast-switching SiC or IGBT bridges generate voltage transients that can couple across the isolation barrier and corrupt data or trigger false edges. A 25kV/µs floor means the ISO7220ADR holds its output state through the dv/dt events typical in 400V-class motor drives, solar inverters, and industrial power supplies. The capacitive coupling technology inherently handles these transients better than optocouplers at equivalent speed, which is why this part is a common choice for isolating gate-driver feedback and fault signals.
Supply range 3V to 5.5V — single-rail or split-rail flexibility
The ISO7220ADR operates from 3V to 5.5V on both sides, so it works with 3.3V logic on the controller side and 5V logic on the field side without a level translator. The 8-SOIC package (0.154" width, 3.90mm body) is a standard footprint that routes easily on two-layer boards.
The full temperature range applies to both the supply voltage window and the isolation rating — no derating of the 2500Vrms barrier at high temperature, which is a common gotcha with some optocoupler-based isolators. This makes the part suitable for outdoor telecom cabinets, factory-floor sensors near hot machinery, and engine-bay electronics that see thermal cycling.
For BOM planning, the base product number ISO7220 covers multiple package and tape options, so the ADR suffix (SOIC-8 in tape-and-reel) is the standard surface-mount variant for volume assembly.