LM4041EIM3-1.2/NOPB

Voltage Reference Overview

The LM4041EIM3-1.2/NOPB is a micropower shunt voltage reference from Texas Instruments, providing a fixed output of 1.225 V. It features an initial accuracy of ±1% and a maximum temperature coefficient of 150 ppm/°C. The device operates within a current range of 45 µA to 12 mA and maintains stability with any capacitive load without requiring external stabilization components. It is housed in a SOT-23-3 surface-mount package and supports an extended industrial operating temperature range from -40°C to +125°C.

Voltage Reference Feature Summary

• Provides stable reverse breakdown voltage with low dynamic impedance across wide operating currents and temperatures
• Ensures stability with any capacitive load, eliminating the need for external stabilizing capacitors
• Utilizes fuse and Zener-zap reverse breakdown voltage trim during wafer sort to ensure high precision
• Designed for space-critical applications using sub-miniature surface-mount packages

Voltage Reference Applications

• Portable battery-powered equipment requiring low quiescent current
• Space-constrained circuit designs utilizing SOT-23 packaging
• Precision measurement systems requiring stable reference voltages
• Data acquisition systems needing accurate voltage references

Voltage Reference Procurement Notes

Verify the specific grade suffix (E) corresponds to the required ±1% tolerance and 150 ppm/°C temperature coefficient. Confirm the NOPB designation indicates lead-free and RoHS compliance. Ensure the SOT-23-3 package matches the PCB footprint requirements. Check that the extended temperature rating (-40°C to +125°C) aligns with the operational environment specifications.

Voltage Reference Selection Notes

Select this component when a fixed 1.225 V reference with ±1% accuracy is sufficient for the application. It is suitable for designs prioritizing low power consumption and small form factor over ultra-high precision. Consider alternative grades if tighter tolerances or lower temperature coefficients are required. Verify that the 12 mA maximum cathode current meets the load requirements.

Voltage Reference Part Context

This part belongs to the LM4041-N family of precision micropower shunt voltage references. The family offers various accuracy grades and package options, including SC-70 and TO-92. The LM4041 series is characterized by its ability to operate without external capacitors and its availability in both fixed and adjustable configurations, catering to diverse industrial and consumer electronics needs.

Voltage Reference Replacement Considerations

LM4041DIM3-1.2/NOPB: Offers higher accuracy (±0.5%) but may have different thermal characteristics.

Voltage Reference FAQ

Does the LM4041EIM3-1.2/NOPB require an external capacitor for stability?

No, the device is designed to be stable with any capacitive load and does not require an external stabilizing capacitor.

What is the minimum operating current for this voltage reference?

The typical minimum operating current is 45 µA, allowing for efficient operation in low-power applications.