LM4128DMF-3.3

Voltage Reference Overview

The LM4128DMF-3.3/NOPB is a precision micropower series voltage reference manufactured by Texas Instruments, housed in a SOT-23-5 surface-mount package. It delivers a fixed nominal output voltage of 3.3 V with an initial accuracy of ±1%. The device features a temperature coefficient of 100 ppm/°C and supports a maximum input voltage of 6 V. It operates within a junction temperature range of -40°C to +125°C and draws a supply current of 100 µA. The shunt current capability reaches a maximum of 20 mA.

Voltage Reference Feature Summary

• Provides stable fixed voltage output for precision analog circuits
• Designed for low-power applications with micropower consumption
• Engineered for high stability across extended industrial temperature ranges

Voltage Reference Applications

• Portable instrumentation systems requiring precise voltage regulation
• Data acquisition channels needing accurate reference sources
• Battery-powered equipment optimizing power efficiency

Voltage Reference Procurement Notes

Verify the specific suffix designation when ordering, as variations such as NOPB indicate lead-free compliance. Confirm that the required initial accuracy and temperature coefficient meet the design specifications. Ensure the operating environment remains within the specified thermal limits to maintain performance integrity.

Voltage Reference Selection Notes

Select this component when a compact surface-mount solution is required for fixed voltage referencing. Consider the 1% initial accuracy and 100 ppm/°C drift characteristics against application tolerance requirements. Evaluate the 6 V maximum input voltage constraint relative to the available supply rails.

Voltage Reference Part Context

This part belongs to the LM4128 family of precision micropower series voltage references from Texas Instruments. The family offers various fixed output voltages and accuracy grades, all sharing a common SOT-23-5 footprint. This specific variant targets general-purpose applications requiring reliable, low-cost voltage referencing in space-constrained designs.

Voltage Reference Replacement Considerations

Compatible substitutes include other LM4128 variants with different output voltages or accuracy grades, provided the pinout and package remain identical. Cross-reference with LM4128CMF-3.3/NOPB or LM4128BMF-3.3/NOPB for tighter tolerances if system requirements demand higher precision.