Dual-channel capacitive isolator for industrial signal isolation
It supports a data rate of 5Mbps with propagation delays of 70ns max and 1ns typical rise/fall times, making it suitable for isolating digital control signals, SPI buses, and UART interfaces in industrial automation, motor drives, and power conversion systems.
The 2500Vrms isolation rating provides basic insulation for equipment operating up to 300V working voltage per UL 1577, covering the majority of industrial control and motor-drive applications. A CMTI below this threshold risks data corruption or false switching events on the isolated side.
5Mbps data rate — bus margin for isolated SPI and UART
At 5Mbps the ISO7220BDG4 handles most industrial fieldbus interfaces (RS-485, CAN) and isolated SPI at clock rates up to 5 MHz without adding a full bit-time of delay. The 70ns max propagation delay in each direction leaves timing margin for daisy-chained SPI devices or multi-drop UART networks. Pulse-width distortion is held to 3ns max, so the duty cycle of the transmitted signal stays within tolerance for protocols that rely on pulse-width encoding.
Supply flexibility and channel direction
The channel configuration is 2 inputs on side 1 and 0 inputs on side 2, meaning both channels drive in the same direction from side 1 to side 2. For bidirectional or mixed-direction isolation, the complementary ISO7221 (1/1 configuration) or ISO7230 (3/0) are the natural siblings within the same family.
The surface-mount package is MSL-rated per the standard SOIC profile; no special bake is needed if the moisture barrier bag seal is intact.