LM4128AMF-1.8

Voltage Reference Overview

The LM4128AMF-1.8 is a micropower shunt voltage reference manufactured by Texas Instruments, designed for precision applications requiring low power consumption and high accuracy. It provides a stable output voltage of 1.8 V with an initial accuracy of 0.1% and a temperature coefficient of 75 ppm/°C. The device operates within a supply voltage range up to 6 V and draws a typical quiescent current of 60 µA. It supports a maximum shunt current of 20 mA and functions reliably across an extended industrial temperature range from -40°C to +125°C. Packaged in a compact SOT-23-5 surface-mount case, it integrates into power management circuits efficiently.

Voltage Reference Feature Summary

• Delivers precise 1.8 V reference voltage with 0.1% initial accuracy
• Features low 60 µA operating current for energy-efficient designs
• Maintains stability over wide temperature variations (-40°C to +125°C)
• Utilizes compact SOT-23-5 package for space-constrained PCB layouts

Voltage Reference Applications

• Portable battery-powered instrumentation
• Data acquisition systems
• Microcontroller analog-to-digital converter references
• Medical equipment power supplies

Voltage Reference Procurement Notes

Verify the exact suffix against official Texas Instruments documentation to confirm pinout compatibility and tolerance grades. Ensure the ordering part number matches the required accuracy and temperature coefficient specifications for your specific application environment. Cross-reference datasheet revisions to validate electrical characteristics before finalizing procurement decisions.

Voltage Reference Selection Notes

Select this component when designing circuits that demand high precision at low power levels. The 0.1% accuracy suits critical measurement tasks, while the 60 µA current draw extends battery life in portable devices. Consider the SOT-23-5 footprint for assembly constraints and verify thermal management requirements given the small package size and potential heat dissipation during operation.

Voltage Reference Part Context

Part of the LM4128 family of micropower series voltage references, offering various output voltages and accuracy grades. This specific model targets applications needing stable reference sources without significant power overhead. It complements other PMIC components in signal conditioning chains, providing reliable baseline voltages for sensitive analog circuits in industrial and consumer electronics.

Voltage Reference Replacement Considerations

LM4128AMFX-1.8/NOPB offers identical electrical specifications in a tape-and-reel packaging format suitable for automated assembly processes.