LM4040DIM3-2.5

Overview

The LM4040DIM3-2.5/NOPB is a precision micropower shunt voltage reference from Texas Instruments, offering a fixed output of 2.5 V in a compact SOT-23-3 package. It features an initial accuracy of ±1% and a temperature coefficient of 150 ppm/°C. The device operates within a supply current range of 100 µA to 15 mA and supports a working temperature range of -40°C to +85°C. Designed for surface-mount installation, it provides stable reference performance for space-constrained applications requiring low power consumption.

Feature Summary

• Micropower shunt architecture with low cathode current requirements
• Fixed 2.5 V output with high initial accuracy
• Compact three-terminal SOT-23 surface-mount packaging
• Stable reference performance across industrial temperature ranges

Applications

• Portable battery-powered instrumentation
• Data acquisition systems
• Microcontroller reference inputs
• Handheld meters

Procurement Notes

Verify the specific suffix (e.g., /NOPB) against the manufacturer's official datasheet to confirm lead-free compliance and exact electrical tolerances. Ensure the ordering part number matches the required accuracy grade and package variant. Cross-reference the component marking code on received units with the official documentation to prevent counterfeit or incorrect revision substitution during procurement.

Selection Notes

Select this component when a fixed 2.5 V reference is required in a small surface-mount footprint. It is suitable for designs prioritizing low quiescent current and moderate precision. Compare the 150 ppm/°C temperature coefficient against stricter application needs; if higher stability is required, consider alternative series members with lower drift specifications while maintaining the same package constraints.

Part Context

This part belongs to the LM4040-N family of micropower shunt voltage references. The family includes various output voltages and accuracy grades, all sharing the same fundamental two-terminal zener-like operation principle. The DIM3 designation specifically indicates the SOT-23-3 surface-mount package variant, distinguishing it from through-hole TO-92 versions or other package options within the broader product line.

Replacement Considerations

• LM4040AIM3-2.5/NOPB
• LM4040CIM3-2.5/NOPB

FAQ

What is the minimum operating current for the LM4040DIM3-2.5?

The device requires a minimum cathode current of 100 µA to maintain regulation.

Is the LM4040DIM3-2.5 automotive qualified?

No, the standard LM4040DIM3-2.5 is rated for an industrial temperature range (-40°C to +85°C). Automotive-grade variants are designated with the QDI prefix.