# Isolated comparator

Canonical URL: https://eloragrid.ai/symbols/isolated-comparator
Publisher: Elora Grid
Updated: 2026-10-27
Lookup label: ISO CMP
Drawing use: Schematic
Reference families: Manufacturer

An isolated comparator evaluates an input condition and transfers its comparison result across an isolation barrier.

## In plain English

### What does Isolated comparator mean?

An isolated comparator evaluates an input condition and transfers its comparison result across an isolation barrier.

### A simple example

A higher-voltage measurement domain can provide a threshold result to a separate controller domain.

### What the drawings help you do

Show the measured condition and comparison reference on the appropriate side of the isolation barrier, then label the result sent to the controller. A comparator reports a threshold relationship. It should not be drawn as if it continuously reports the full measured analogue value.

### Before using this reference

- Identify the monitored input and comparison condition.
- Show the isolation boundary and both reference domains.
- Label the output as a threshold result.

### Does the output contain the complete measurement?

A comparator typically reports which side of a defined threshold the input lies on. A continuously sampled measurement requires a different measurement chain, such as the selected ADC arrangement.

### Terms

- Comparator: A function that assesses the relationship between an input and a reference.
- Threshold result: A discrete indication of the specified comparison condition.

Concept diagram: Input versus threshold → Isolated comparison function → Threshold result to controller
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.

- [Isolated signal and control functions](https://www.ti.com/product-category/isolation/overview.html)


## What it represents

An isolated comparator evaluates an input condition and transfers its comparison result across an isolation barrier.
A higher-voltage measurement domain can provide a threshold result to a separate controller domain.
Show the measured condition and comparison reference on the appropriate side of the isolation barrier, then label the result sent to the controller. A comparator reports a threshold relationship. It should not be drawn as if it continuously reports the full measured analogue value. This is original functional artwork, not a certified standard graphic or device pinout.

## How to read it

- Identify the monitored input and comparison condition.
- Show the isolation boundary and both reference domains.
- Label the output as a threshold result.
- A threshold indication is different from a continuously measured analogue value.

## Information to show or reference

- Identify the monitored input and comparison condition.
- Show the isolation boundary and both reference domains.
- Label the output as a threshold result.

## Important distinction

A threshold indication is different from a continuously measured analogue value.

## Facts

- Representation type: Original functional block; not a certified IEC or IEEE graphic
- Concept input: Input versus threshold
- Concept output: Threshold result to controller

## Public references

- [Isolated signal and control functions](https://www.ti.com/product-category/isolation/overview.html) — Texas Instruments. Isolated signal and control functions: public technical context for the named function. Product and compliance details remain with the publisher.

## 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.