LM4128BMFX-3.0

Voltage Reference Overview

The LM4128BMFX-3.0 is a micropower series voltage reference manufactured by Texas Instruments, housed in an SOT-23-5 surface-mount package. It provides a fixed output voltage of 3 V with an initial accuracy of 0.2%. The device operates within a temperature range of -40°C to +125°C and features a maximum shunt current of 20 mA. It supports a maximum input voltage of 6 V and exhibits a temperature coefficient of 75 PPM/°C.

Voltage Reference Feature Summary

• Provides stable precision voltage referencing in a compact SMD form factor
• Operates efficiently at low quiescent currents suitable for battery-powered systems
• Maintains performance across extended industrial temperature ranges

Voltage Reference Applications

• Portable instrumentation requiring precise analog references
• Battery-operated measurement devices
• Data acquisition systems needing stable voltage baselines

Voltage Reference Procurement Notes

Verify the specific suffix 'BMFX' corresponds to the required 0.2% accuracy grade and 3.0 V output variant. Confirm RoHS compliance status as indicated in official documentation. Ensure the SOT-23-5 footprint matches the design layout. Check for end-of-life or obsolescence notices from the manufacturer before finalizing procurement plans.

Voltage Reference Selection Notes

Select this component when a 3 V reference with 0.2% initial accuracy is required in a small SOT-23-5 package. It is suitable for applications prioritizing low power consumption alongside moderate precision. Compare against the AMFX variant if tighter 0.1% accuracy is necessary, or the DMFX variant if lower cost with higher tolerance is acceptable.

Voltage Reference Part Context

This part belongs to the LM4128 family of micropower series voltage references from Texas Instruments. The family offers various fixed output voltages and accuracy grades (A, B, D) in SOT-23 packages. These references are designed for applications requiring high stability and low power dissipation in space-constrained environments.

Voltage Reference Replacement Considerations

LM4128AMFX-3.0/NOPB offers 0.1% accuracy. LM4128DMFX-3.0/NOPB offers 1% accuracy. LM4128BMF-3.0 is the leaded equivalent.