LM4040DEM3-5.0/NOPB

Overview

The LM4040DEM3-5.0/NOPB is a micropower shunt voltage reference manufactured by Texas Instruments, formerly National Semiconductor. It provides a fixed 5.0 V output with an initial accuracy of 1%. The device features a maximum temperature coefficient of 150 ppm/°C and supports a maximum shunt current of 15 mA. It operates within a temperature range of -40 °C to +85 °C and is housed in a SOT-23 surface-mount package.

Feature Summary

• Provides stable fixed output voltage for precision applications
• Designed for space-constrained surface-mount layouts
• Operates reliably across industrial temperature ranges

Applications

• Portable instrumentation circuits
• Battery-powered measurement systems
• Data acquisition input references

Procurement Notes

Verify the manufacturer designation as Texas Instruments, which acquired National Semiconductor. Confirm the specific suffix indicates lead-free (NOPB) compliance and tape-and-reel packaging format. Ensure the part number matches the exact 1% accuracy grade and 5.0 V nominal output required for the design specifications.

Selection Notes

Select this component when a low-cost, high-accuracy shunt reference is needed for 5 V logic or ADC biasing. Consider the 150 ppm/°C drift if higher thermal stability is required. Evaluate the SOT-23 footprint against available board space constraints compared to larger packages.

Part Context

This part belongs to the LM4040 family of micropower shunt references. It shares architectural similarities with other grades like LM4040BIM3X but differs in initial accuracy and temperature coefficient specifications. The DEM3X suffix denotes the specific SOT-23 package variant optimized for automated surface-mount assembly processes.

Replacement Considerations

LM4040CEM3-5.0/NOPB offers tighter accuracy at 0.5%.