LM4040DIM3X-4.1

Overview

The LM4040DIM3X-4.1 is a micropower shunt voltage reference manufactured by Texas Instruments, formerly National Semiconductor. It provides a fixed output voltage of 4.1 V with an initial accuracy of 1% and a temperature coefficient of 150 ppm/°C. The device operates within a supply current range of 10 µA to 15 mA and functions across a temperature range of -40°C to +85°C. Packaged in a compact SOT-23-3 surface-mount format, it serves as a stable reference for precision applications.

Feature Summary

• Micropower shunt voltage reference design
• Fixed 4.1 V output voltage
• Compact SOT-23-3 package
• Industrial temperature operation

Applications

• Portable instrumentation
• Battery-powered systems
• Data acquisition systems
• Microcontroller reference sources

Procurement Notes

Verify the manufacturer designation carefully, as Texas Instruments acquired National Semiconductor. Ensure the specific suffix matches the required tolerance and packaging configuration. Confirm RoHS compliance status through official documentation prior to procurement to meet regulatory requirements.

Selection Notes

Select this component when a low-cost, space-saving voltage reference is required for non-critical precision tasks. The 1% accuracy and 150 ppm/°C drift are suitable for general-purpose applications where higher precision variants like the LM4040BIM3X are unnecessary or cost-prohibitive.

Part Context

This part belongs to the LM4040 family of micropower shunt references. It shares architectural similarities with other members but differs in initial accuracy and temperature stability specifications. The DIM3X suffix indicates a specific accuracy grade and SMD packaging variant within the broader product line.

Replacement Considerations

LM4040CIM3X-4.1/G4 offers improved 0.5% accuracy. LM4040BIM3X-4.1/NOPB provides superior 0.2% accuracy and lower drift. Verify pinout compatibility and thermal performance when substituting with these higher-grade alternatives.