Skip to datasheet
A-grade 2.5 V shunt reference

LM4040 Working Principle

Learn how LM4040 works with an illustrated explanation and practical readings.

Package view

LM4040 at a glance

Follow the labeled connections and functional stages

LM4040 working principle: illustrated functional stages, basic circuit and connections
Select the diagram to read it at full resolution.

How it works

3 stages · Explore one step at a time

Step 1 / 3

Limit the source current

Always use a feed resistor or a controlled current source. Never connect the shunt directly across 5 V.

Step 2 / 3

Reserve reference current

Subtract the maximum load current from the minimum feed current; retain at least 65 µA over temperature.

Step 3 / 3

Select the exact grade

A-grade, 2.5 V and industrial I-temperature limits are used here; other grades differ.

Component view