AC-input transistor-output single-channel opto-emulator for automotive applications

The Texas Instruments ISOM811x-Q1 devices are single-channel optocoupler emulators with LED-emulator input and transistor output. The devices are footprint compatible and pin-to-pin upgrades for many conventional optocouplers, allowing improvement to existing systems with no PCB redesign.

The opto-emulators provide significant reliability and performance advantages compared to optocouplers, including high bandwidth, low turn-off delay, low power consumption, wider temperature ranges, flat CTR, and tight process controls resulting in small part-to-part skew. Since there is no ageing effect or temperature variation to compensate for, the emulated LED input stage consumes less power than optocouplers.

These devices are offered in small SOIC-4 packages with 2.54mm and 1.27mm pin pitches, supporting a 3.75kVRMS isolation rating and DC (ISOM811[0-3]-Q1) and bidirectional DC (ISOM811[5-8]-Q1) input options. Their high performance and reliability allow them to be employed in power supply feedback design, motor drives, I/O modules in industrial controllers, factory automation applications, and more.