This application report discusses the necessity of electronic isolation in high-speed digital circuits and compares optical, magnetic, and capacitive…
This document is an application report by Texas Instruments (TI) regarding high-speed digital isolators. It explains the necessity of circuit isolation to protect against dangerous voltages and currents, such as in medical or industrial applications. The report compares three main signal transmission methods: optical, magnetic (inductive), and electrical (capacitive) coupling.
| UL 1577 Isolation Voltage | 2500 VRMS |
|---|---|
| IEC 60747-5-2 Isolation Voltage | 560 V Peak |
The TI ISO72x series uses capacitive coupling technology.
The main advantages are high efficiency in size and energy transfer, and inherent immunity to magnetic fields.