LM4128CMFX-1.8

Voltage Reference Overview

The LM4128CMFX-1.8 is a 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 0.5%. The device operates within a temperature range of -40°C to +125°C and features a maximum shunt current of 20 mA. It draws a typical quiescent current of 60 µA and supports a maximum input voltage of 6 V.

Voltage Reference Feature Summary

• Provides stable precision voltage reference performance in a compact footprint
• Designed for low power consumption suitable for battery-operated systems
• Capable of operation across extended industrial temperature ranges

Voltage Reference Applications

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

Voltage Reference Procurement Notes

Verify the specific suffix 'CMFX' against the manufacturer's official datasheet to confirm the exact accuracy grade and packaging specifications. Ensure the ordering part number matches the required initial accuracy tolerance and thermal characteristics defined in the component documentation before procurement.

Voltage Reference Selection Notes

Select this component when a fixed 1.8 V reference is required with moderate accuracy in space-constrained designs. Consider the 60 µA quiescent current for power budget calculations. Verify that the 20 mA shunt current capability meets the load requirements of the target circuit application.

Voltage Reference Part Context

This component belongs to the LM4128 family of micropower series voltage references from Texas Instruments. The family offers various output voltages and accuracy grades, all sharing similar low-power operational characteristics and SOT-23 packaging options for integration into portable electronic designs.

Voltage Reference Replacement Considerations

LM4128DMFX-1.8/NOPB: Offers 1% accuracy instead of 0.5%. LM4128AMFX-1.8/NOPB: Offers 0.1% accuracy. Verify pinout compatibility and electrical parameter alignment with the original design requirements.