LM4051BEM3-1.2/NOPB

Voltage Reference Overview

The LM4051BEM3-1.2/NOPB is a precision micropower shunt voltage reference manufactured by Texas Instruments, housed in a compact SOT-23 surface-mount package. It provides a fixed output voltage of 1.225 V with an initial accuracy of ±0.2% at 25°C. The device operates within a current range of 60 µA to 12 mA and features a maximum temperature coefficient of 50 ppm/°C. It supports an industrial operating temperature range from -40°C to +85°C. Designed for space-constrained applications, it maintains stability without requiring external output capacitors across any capacitive load.

Voltage Reference Feature Summary

• Provides a fixed 1.225 V reference output with ±0.2% initial accuracy
• Operates stably without external output capacitors under any capacitive load
• Supports low quiescent current starting at 60 µA for power efficiency
• Available in a small SOT-23 surface-mount package

Voltage Reference Applications

• Battery-powered portable devices
• Data acquisition systems
• Handheld instruments
• Microcontroller supply monitoring

Voltage Reference Procurement Notes

Verify the specific suffix B indicates the ±0.2% accuracy grade when sourcing replacements. Confirm the NOPB designation ensures compliance with RoHS standards and absence of lead. Ensure the ordering code matches the exact SOT-23-3 package variant required for your PCB footprint. Cross-reference the manufacturer part number against official TI databases to confirm current production status and availability.

Voltage Reference Selection Notes

Select this component when a sub-1.3 V reference is required in ultra-small packages. The B-grade accuracy suits applications needing tighter tolerance than standard C-grade parts but at lower cost than A-grade. Consider the 60 µA minimum current requirement for battery life calculations. Verify that the 12 mA maximum cathode current aligns with your circuit's power dissipation limits.

Voltage Reference Part Context

This part belongs to the LM4051-N family of micropower shunt references. It shares the same physical footprint and operational principles as other variants like the LM4051AIM3X-ADJ/NOPB but differs in fixed voltage output and specific accuracy grading. The series is designed to replace older discrete Zener diode solutions in modern low-power electronics.

Voltage Reference Replacement Considerations

• LM4051CIM3-1.2/NOPB
• LM4051AIM3-1.2/NOPB

Voltage Reference FAQ

Does the LM4051BEM3-1.2/NOPB require an external capacitor for stability?

No, the device is designed to remain stable without an external output capacitor across any capacitive load.

What is the minimum operating current for this voltage reference?

The minimum operating current is 60 µA.