LM4051BIM3-1.2

Voltage Reference Overview

The LM4051BIM3-1.2 is a precision micropower shunt voltage reference manufactured by National Semiconductor, now part of Texas Instruments. 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 is housed in a compact SOT-23 surface-mount package (PDSO3) measuring 3 x 1.30 mm. The component supports industrial operating temperatures from -40°C to +85°C.

Voltage Reference Feature Summary

• Provides a stable 1.225 V reverse breakdown voltage without requiring external stabilizing capacitors.
• Maintains stability when connected to any capacitive load due to advanced internal design.
• Achieves high precision through fuse and Zener-zap trimming during wafer sort processes.

Voltage Reference Applications

• Space-critical applications requiring sub-miniature packaging solutions
• Battery-powered equipment utilizing low quiescent current operation
• Data acquisition systems requiring precise voltage references

Voltage Reference Procurement Notes

Verify the manufacturer designation as National Semiconductor or Texas Instruments, as production was transferred. Confirm the specific suffix indicates the B grade for ±0.2% accuracy. Ensure the package matches the SOT-23 form factor. Check for RoHS compliance status if required by your assembly specifications.

Voltage Reference Selection Notes

Select this component when a fixed 1.225 V reference is needed in a small footprint. It is suitable for designs where space is limited but high precision is required. Consider the B grade accuracy if tighter tolerances are not necessary. Verify that the operating current range meets the system's power budget constraints.

Voltage Reference Part Context

This device belongs to the LM4051-N series of precision voltage references. It shares functional similarities with other shunt references but is distinguished by its specific 1.225 V output and SOT-23 packaging. The series is designed to eliminate the need for external compensation components while ensuring stability across various load conditions.

Voltage Reference Replacement Considerations

LM4051BIM3X-1.2/NOPB: Identical function with updated manufacturing suffix.

Voltage Reference FAQ

Does the LM4051BIM3-1.2 require an external capacitor for stability?

No, the advanced design eliminates the need for an external stabilizing capacitor while ensuring stability with any capacitive load.

What is the initial accuracy of the LM4051BIM3-1.2?

The B grade version has an initial accuracy of ±0.2% at 25°C.