6-channel SPI isolator for automotive and industrial isolation barriers
The TI ISO6762QDWRQ1 is a 6-channel unidirectional digital isolator from the ISO676x-Q1 series, built with capacitive coupling technology and rated for 5000 Vrms isolation. It is designed for SPI bus isolation in automotive and industrial systems where a reinforced isolation barrier is required between a controller and its peripherals — think ADAS sensor interfaces, battery-management communication links, or motor-drive control signals that must cross a safety isolation boundary. The part carries AEC-Q100 qualification and operates across -40°C to 125°C, suiting it for under-hood and high-ambient-temperature environments.
The 50 Mbps data rate supports standard SPI clock rates up to 50 MHz in full-duplex mode, covering the majority of automotive and industrial SPI peripherals (ADCs, DACs, digital potentiometers, sensor hubs). The 100 kV/µs common-mode transient immunity ensures that fast-switching edges from adjacent power stages — SiC or IGBT gate drivers switching at tens of kV/µs — do not corrupt the isolated data stream. This combination makes the ISO6762QDWRQ1 a natural fit for traction inverter and on-board charger isolation links where noise immunity is as important as raw speed.
Channel mapping: 4 inputs on side 1, 2 inputs on side 2
The six unidirectional channels are split 4/2: four inputs on side 1 (typically the controller side) and two inputs on side 2 (the peripheral side). This maps directly to a standard SPI interface — SCLK, MOSI, MISO, and chip select occupy three of the four side-1 channels, leaving one spare for an extra control signal (e.g., a reset or interrupt). The two side-2 inputs can carry feedback signals like fault flags or data-ready strobes back to the controller. The 16-SOIC wide-body package (7.50 mm body width) provides the creepage distance required for 5000 Vrms reinforced isolation in a surface-mount footprint.