LM4128DMF-4.1/NOPB

Voltage Reference Overview

The LM4128DMF-4.1/NOPB is a precision micropower series voltage reference manufactured by Texas Instruments, formerly National Semiconductor. It provides a fixed output of 4.096V with an initial accuracy of ±0.1% and a temperature coefficient of 75 ppm/°C. The device operates within an input voltage range of 4.496V to 5.5V and draws a supply current of 100µA. It supports a maximum shunt current of 20mA and functions reliably across a temperature range of -40°C to +125°C. Packaged in a 5-pin SOT-23 surface-mount case, it is designed for space-constrained applications requiring high stability.

Voltage Reference Feature Summary

• Delivers high-precision fixed voltage output with tight initial tolerance
• Features low temperature coefficient for stable performance across wide thermal ranges
• Operates with minimal supply current suitable for power-sensitive designs

Voltage Reference Applications

• Portable instrumentation systems requiring precise analog references
• Battery-powered measurement devices needing low quiescent current
• Data acquisition systems utilizing high-resolution ADCs

Voltage Reference Procurement Notes

Verify the manufacturer designation as Texas Instruments despite the National Semiconductor model history. Confirm the specific suffix indicates the 4.096V output variant and SOT-23-5 package. Ensure compatibility with RoHS standards if required by your assembly process. Cross-reference the exact part number against current TI catalogs to confirm availability and datasheet revisions before finalizing procurement specifications.

Voltage Reference Selection Notes

Select this component when a stable 4.096V reference is needed in a compact SOT-23 footprint. It is appropriate for applications demanding low power consumption alongside high accuracy. Consider the 75 ppm/°C drift rate against environmental conditions. Compare against other LM4128 variants if different output voltages or tighter tolerances are required for the specific circuit design constraints.

Voltage Reference Part Context

This component belongs to the LM4128 family of precision micropower series voltage references. The family offers various fixed output voltages including 1.25V, 2.5V, and 4.096V options. All variants share similar low-power characteristics and SOT-23 packaging, providing designers with flexible reference solutions for diverse electronic applications while maintaining consistent performance metrics across the product line.

Voltage Reference Replacement Considerations

LM4128DMFX4.1/NOPB serves as a direct equivalent with identical electrical specifications and pinout configuration. Verify that any substitute maintains the same 4.096V output and 75 ppm/°C temperature coefficient to ensure circuit compatibility without redesigning the reference network.