LM4128DMF-1.8

Voltage Reference Overview

The LM4128DMF-1.8 is a precision micropower shunt voltage reference manufactured by Texas Instruments, designed for applications requiring stable voltage regulation in compact spaces. It delivers 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 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 five-pin SOT-23 format, it integrates high performance with low power consumption.

Voltage Reference Feature Summary

• Provides a stable 1.8 V reference output with 1% initial accuracy for precise circuit regulation.
• Operates with ultra-low power consumption, drawing only 60 µA of quiescent current.
• Engineered for wide thermal stability, maintaining performance across temperatures from -40°C to +125°C.

Voltage Reference Applications

• Portable battery-powered instrumentation
• Handheld meters and data acquisition systems
• Microcontroller analog-to-digital converter references

Voltage Reference Procurement Notes

Verify the specific suffix codes on the component marking against the official datasheet to confirm the exact voltage version and package type. Ensure that the ordering information matches the required tolerance and temperature grade specifications for your design. Cross-reference the manufacturer part number with authorized distributors to confirm authenticity and availability status before finalizing procurement plans.

Voltage Reference Selection Notes

Select this component when a low-power, space-constrained voltage reference is required for portable electronics. The 1.8 V output is suitable for low-voltage logic interfaces and ADCs. Consider the 1% accuracy and 100 ppm/°C drift if higher precision is needed, as other variants in the family offer tighter tolerances. Ensure the input voltage remains within the 6 V maximum limit during operation.

Voltage Reference Part Context

This component belongs to the LM4128 series of precision micropower shunt voltage references from Texas Instruments. The series is characterized by its ability to provide accurate voltage regulation in small surface-mount packages while minimizing power usage. It serves as a fundamental building block for power management circuits in consumer and industrial electronics where size and efficiency are critical constraints.

Voltage Reference Replacement Considerations

LM4128DMFX-1.8/NOPB

Voltage Reference FAQ

What is the maximum operating voltage for the LM4128DMF-1.8?

The maximum series input voltage for this device is 6 V.

Does the LM4128DMF-1.8 support automotive applications?

No, the standard LM4128DMF-1.8 is not AEC-Q100 qualified; automotive versions carry the AQ1 designation.