LM4128AMFX-3.3

Voltage Reference Overview

The LM4128AMFX-3.3 is a precision micropower series voltage reference manufactured by Texas Instruments in a SOT-23-5 package. It provides a fixed output voltage of 3.3 V with an initial accuracy of ±0.1% and a temperature coefficient of 75 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 reliably across an extended temperature range from -40°C to +125°C.

Voltage Reference Feature Summary

• Provides stable fixed output voltage for precision applications
• Features low temperature coefficient for thermal stability
• Designed for micropower operation with minimal current consumption

Voltage Reference Applications

• Portable instrumentation requiring precise voltage references
• Battery-powered measurement systems
• Data acquisition systems needing stable reference sources

Voltage Reference Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm the specific suffix matches the required tolerance and packaging format. Check current availability status as this part may be obsolete or subject to supply constraints. Ensure environmental compliance documentation aligns with project requirements before procurement.

Voltage Reference Selection Notes

Select this component when a fixed 3.3 V reference with high initial accuracy is required. Consider the SOT-23-5 package size for space-constrained designs. Evaluate the 75 ppm/°C temperature coefficient against system thermal variations. Compare power consumption needs with the micropower specifications to ensure compatibility with battery life targets.

Voltage Reference Part Context

This component belongs to the LM4128 family of precision voltage references. It shares architectural similarities with other variants offering different output voltages and accuracies. The series is designed for applications demanding stable reference voltages in compact surface-mount packages. It complements other Texas Instruments power management solutions for complete system design.

Voltage Reference Replacement Considerations

LM4128AMF-3.3/NOPB serves as a verified equivalent variant within the same product line. Both parts share identical electrical characteristics and pin configurations. Verify package compatibility and lead marking differences when substituting. Confirm that any alternative meets the same accuracy and temperature coefficient specifications.