LM4128DMFX-1.8

Voltage Reference Overview

The LM4128DMFX-1.8 is a precision micropower shunt voltage reference manufactured by Texas Instruments, designed for surface-mount applications in the SOT-23-5 package. It provides a fixed output voltage of 1.8 V with an initial accuracy of 1% and a temperature coefficient of 100 ppm/°C. The device operates within an input voltage range up to 6 V and supports a maximum shunt current of 20 mA. It functions at supply currents of 60 uA across an extended temperature range from -40°C to +125°C.

Voltage Reference Feature Summary

• Delivers stable 1.8 V reference voltage with high precision
• Optimized for low-power consumption in portable designs
• Compact SOT-23-5 surface-mount packaging

Voltage Reference Applications

• Portable instrumentation systems
• Battery-powered measurement devices
• Microcontroller analog-to-digital converter references

Voltage Reference Procurement Notes

Verify that the ordering suffix matches the required tolerance and temperature grade specifications. Confirm the package type aligns with PCB footprint requirements. Ensure the manufacturer source is authorized to guarantee component authenticity and traceability. Check RoHS compliance status if restricted substances are prohibited in the target application environment.

Voltage Reference Selection Notes

Select this component when a fixed 1.8 V reference is required with moderate precision. Consider the 100 ppm/°C drift if thermal stability is critical. Evaluate the 60 uA quiescent current against system power budgets. Verify that the 20 mA shunt current capability meets load regulation needs without exceeding thermal limits.

Voltage Reference Part Context

This part belongs to the LM4128 series of precision micropower shunt voltage references. It shares architectural similarities with other variants in the family but differs in output voltage and accuracy grades. The DMF suffix indicates a specific tape-and-reel packaging configuration for automated assembly processes.

Voltage Reference Replacement Considerations

LM4128AMFX-1.8/NOPB offers higher 0.1% accuracy. LM4128CMFX-1.8/NOPB provides standard commercial grade performance.