# Current-sense amplifier

Canonical URL: https://eloragrid.ai/symbols/current-sense-amplifier
Publisher: Elora Grid
Updated: 2026-10-14
Lookup label: CSA
Drawing use: Schematic
Reference families: Manufacturer

Amplifies a voltage associated with a current-sensing shunt using the selected measurement-input arrangement.

## What it represents

Amplifies a voltage associated with a current-sensing shunt using the selected measurement-input arrangement.
On a schematic, identify the shunt polarity, input common-mode reference and gain definition and trace the current-related output and ADC or protection circuit. Keep the component tag and signal/reference names consistent across the control drawing, terminal schedule and device documentation.
A current-sense amplifier measures a shunt voltage; it does not replace the shunt or establish an isolated current-transformer connection.
Terminal letters describe electrical roles, not package pin numbers. Check the selected public datasheet for the actual pin assignment, polarity and any internally connected terminals before completing the drawing.

## How to read it

- Identify the shunt polarity, input common-mode reference and gain definition.
- Trace the current-related output and ADC or protection circuit.

## Information to show or reference

- Label the shunt polarity, input common-mode reference and gain definition.
- Cross-reference the current-related output and ADC or protection circuit.
- Add the selected device or circuit documentation revision, power/reference connections and project signal convention.

## Important distinction

A current-sense amplifier measures a shunt voltage; it does not replace the shunt or establish an isolated current-transformer connection.

## Facts

- Common schematic mnemonic: CSA — descriptive only; project/device documentation defines reference designations.
- Terminal / interface focus: The shunt polarity, input common-mode reference and gain definition
- Artwork scope: Original educational component glyph; not a certified standard graphic or package pinout.

## Public references

- [AD8418 — shunt-current sensing](https://www.analog.com/en/products/ad8418.html) — Analog Devices. Public primary manufacturer documentation establishes the component function or circuit/topology relationship. Preview geometry and drafting explanations are independently authored.

## 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.