ISO35TDW – TEXAS INSTRUMENTS

The ISO35TDW is a Texas Instruments digital isolator featuring a 3.75kVrms isolation voltage, crucial for robust galvanic isolation in high-voltage applications. Packaged in a space-saving SOIC-8, it employs capacitive coupling for signal transfer, eliminating the need for optocouplers and their associated latency. This device boasts a wide common-mode voltage range of ±1000V, significantly exceeding typical isolators. It operates from a 2.5V to 5.5V supply voltage range, making it compatible with various microcontroller and logic families. The ISO35TDW offers a data rate up to 100Mbps, ideal for high-speed communication in industrial control systems or medical equipment where safety is paramount. Its low propagation delay (typically <10ns) minimizes latency in critical control loops. Key advantages include enhanced noise immunity due to capacitive coupling and improved reliability compared to optocouplers, resulting from the absence of LED degradation. Use cases include isolated sensor interfaces, motor control systems requiring high voltage isolation, and medical instrumentation demanding robust safety barriers. Its high isolation voltage and speed make it a superior choice for applications exceeding the capabilities of standard digital isolators.