LM4128BMFX-1.8

Voltage Reference Overview

The LM4128BMFX-1.8 is a precision micropower series voltage reference manufactured by Texas Instruments, housed in a SOT-23-5 surface-mount package. It provides a fixed output voltage of 1.8 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 consumes a typical quiescent current of 60 µA.

Voltage Reference Feature Summary

• Provides stable reference voltage with high initial accuracy
• Designed for low power consumption applications
• Capable of operation across extended industrial temperature ranges

Voltage Reference Applications

• Portable instrumentation requiring precise voltage references
• Battery-powered measurement systems
• Data acquisition circuits

Voltage Reference Procurement Notes

Verify the specific suffix 'BMFX' against official datasheets to confirm pinout compatibility and tolerance grades. Ensure the ordering part number matches the required accuracy and packaging format. Cross-reference with the manufacturer's latest documentation to validate RoHS compliance and environmental specifications before procurement.

Voltage Reference Selection Notes

Select this component when a compact SOT-23-5 footprint is required alongside tight voltage accuracy. Consider the 6 V maximum input voltage limit relative to the supply rail. Evaluate the 60 µA quiescent current against system power budgets. Confirm that the 20 mA shunt current capability meets the load requirements of the reference circuit.

Voltage Reference Part Context

This component belongs to the LM4128 family of precision micropower series voltage references from Texas Instruments. The family offers various fixed output voltages and accuracy grades. The LM4128 series is designed to replace larger, higher-power zener diodes in space-constrained designs while maintaining superior stability and lower noise characteristics.

Voltage Reference Replacement Considerations

LM4128DMFX-1.8/NOPB: Offers 1% accuracy instead of 0.2%. LM4128AMFX-1.8/NOPB: Offers 0.1% accuracy instead of 0.2%. LM4128BMF-1.8/NOPB: Same electrical specs but may differ in reel/cut-tape packaging configuration.