The Texas Instruments ISO7320FCD is a two-channel, unidirectional digital isolator using capacitive coupling to provide 3000 Vrms of galvanic isolation across the barrier. It is a general-purpose part, meaning it handles standard digital signals — SPI, UART, GPIO, PWM — up to 25 Mbps without needing a dedicated protocol isolator.
25 Mbps data rate — what it buys you
At 25 Mbps, this part comfortably handles 8-bit SPI at 25 MHz clock, UART at any common baud rate (115200, 1 Mbps, etc.), and general-purpose digital I/O. The 57 ns max propagation delay (both directions) and 4 ns pulse-width distortion mean the timing budget stays tight enough for most control and data-acquisition links. If you need 50 Mbps or higher, the family has faster siblings; for isolated I²C (bidirectional), this is not the right part — the unidirectional channels won't handle the clock stretching.
25 kV/µs CMTI — why it matters for motor drives and inverters
Common-mode transient immunity of 25 kV/µs is the spec that keeps data intact when a motor-drive IGBT switches 600 V in a few nanoseconds. Without enough CMTI, the coupling capacitor inside the isolator can misinterpret the fast edge as a logic transition, corrupting the signal. This rating is well into the industrial inverter range and matches what you need for variable-frequency drives, servo amplifiers, and UPS systems.
It is ROHS3 compliant.