Isolator vs. Optocoupler Technology

1.0. Introduction

Optocouplers have been the unchallenged signal isolation solution for more than four decades, but digital isolators fabricated in complementary metallic oxide semiconductor (CMOS) process technology are gaining favor in the design community because of their superior performance, reliability and integration. This white paper explains the underlying technologies of digital optocouplers and digital CMOS isolators with side-by-side performance and reliability comparisons.

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