LM4040DEM3X-5.0/NOPB

Overview

The LM4040DEM3X-5.0/NOPB is a micropower shunt voltage reference from Texas Instruments, providing a fixed 5 V output in a compact SOT-23 package. It features an initial accuracy of 1% and a temperature coefficient of 150 ppm/°C. The device operates within a -40°C to +85°C range, drawing a cathode current of 70 µA with a maximum shunt current of 15 mA. Noise performance is specified at 35 µVrms between 10 Hz and 10 kHz.

Feature Summary

• Micropower operation with low quiescent current consumption
• Compact surface-mount SOT-23 packaging for space-constrained designs
• Fixed 5 V precision reference output

Applications

• Portable battery-powered instrumentation
• Data acquisition systems
• Handheld meters

Procurement Notes

Verify the specific suffix 'DEM3X' against the official datasheet to confirm it denotes the standard 1% accuracy variant rather than higher precision grades. Ensure the ordering part number matches the required tolerance and temperature coefficient specifications for your design requirements.

Selection Notes

Select this component when a fixed 5 V reference is needed with moderate precision (1%) and low power consumption. It serves as a cost-effective alternative to series references in applications where supply headroom is limited or board space is restricted.

Part Context

This device belongs to the LM4040 family of micropower shunt voltage references. The family offers various output voltages and accuracy grades, all sharing the same low-power architecture and SOT-23 form factor suitable for portable electronics.

Replacement Considerations

LM4040DEM3-5.0/NOPB is a direct equivalent. Other LM4040 variants with different accuracy grades or output voltages may serve as functional substitutes if electrical parameters align with system requirements.