# Magnetic digital isolator

Canonical URL: https://eloragrid.ai/symbols/magnetic-digital-isolator
Publisher: Elora Grid
Updated: 2026-10-27
Lookup label: ISO MAG
Drawing use: Schematic
Reference families: Manufacturer

A magnetic digital isolator transfers digital information across its isolation barrier using magnetic coupling.

## In plain English

### What does Magnetic digital isolator mean?

A magnetic digital isolator transfers digital information across its isolation barrier using magnetic coupling.

### A simple example

The two sides of a control interface can exchange logic information while retaining their specified electrical separation.

### What the drawings help you do

Draw two electrical domains with a barrier between them and identify the signal direction. Magnetic coupling transfers information without a direct conducting signal path across that barrier. Power for each side and the device’s insulation requirements must still be represented separately.

### Before using this reference

- Identify both supply/reference domains.
- Show each signal’s direction across the barrier.
- Reference the selected isolator’s working-voltage and insulation data.

### Does magnetic coupling transfer the load’s operating power too?

A signal isolator transfers information. Any isolated power function must be explicitly provided by the selected equipment; it must not be inferred from the magnetic signal-coupling method.

### Terms

- Isolation barrier: The specified electrical separation between circuit domains.
- Magnetic coupling: Transfer through a changing magnetic field rather than a direct signal conductor.

Concept diagram: First-domain logic signal → Magnetic isolation barrier → Second-domain logic signal
Original functional explanation. Arrows show information or energy roles; two-headed arrows identify two-way interfaces. This is not a pinout, certified standards graphic or complete circuit.

- [Transformer-coupled digital isolation example](https://www.analog.com/en/products/adum1100.html)


## What it represents

A magnetic digital isolator transfers digital information across its isolation barrier using magnetic coupling.
The two sides of a control interface can exchange logic information while retaining their specified electrical separation.
Draw two electrical domains with a barrier between them and identify the signal direction. Magnetic coupling transfers information without a direct conducting signal path across that barrier. Power for each side and the device’s insulation requirements must still be represented separately. This is original functional artwork, not a certified standard graphic or device pinout.

## How to read it

- Identify both supply/reference domains.
- Show each signal’s direction across the barrier.
- Reference the selected isolator’s working-voltage and insulation data.
- The coupling method does not itself establish the device's working voltage or certification.

## Information to show or reference

- Identify both supply/reference domains.
- Show each signal’s direction across the barrier.
- Reference the selected isolator’s working-voltage and insulation data.

## Important distinction

The coupling method does not itself establish the device's working voltage or certification.

## Facts

- Representation type: Original functional block; not a certified IEC or IEEE graphic
- Concept input: First-domain logic signal
- Concept output: Second-domain logic signal

## Public references

- [Transformer-coupled digital isolation example](https://www.analog.com/en/products/adum1100.html) — Analog Devices. Primary-source technical context for this particular function; product-specific ratings remain with the manufacturer.

## Graphic scope

Independent original educational concept illustration by Elora Grid. Not a certified standards graphic or manufacturer footprint. Unitless; not to scale. Original artwork licence: https://creativecommons.org/licenses/by/4.0/. Publisher material is linked only.