LM4128CQ1MF3.0/NOPB

Voltage Reference Overview

The LM4128CQ1MF3.0/NOPB is a micropower series voltage reference IC manufactured by Texas Instruments, formerly National Semiconductor. It provides a fixed output of 3 V with an initial accuracy of ±0.5% and a temperature coefficient of 100 ppm/°C. The device operates within an input voltage range of 3.4 V to 5.5 V and draws a supply current of 100 µA. It supports a maximum shunt current of 20 mA and functions across a junction temperature range of -40°C to +125°C. The component is housed in a SOT-23-5 package and holds AEC-Q100 automotive qualification.

Voltage Reference Feature Summary

• Automotive-grade reliability certified under the AEC-Q100 standard for robust performance in vehicle environments.
• Micropower operation design enabling low quiescent current consumption suitable for battery-powered applications.
• Precision series regulation architecture ensuring stable output voltage with minimal drift over temperature variations.

Voltage Reference Applications

• Automotive electronic systems requiring precise voltage references
• Data acquisition circuits demanding high accuracy
• Portable instrumentation powered by limited energy sources

Voltage Reference Procurement Notes

Verify that the ordering suffix matches the specific tolerance and packaging requirements for your design. Confirm the manufacturer designation as Texas Instruments despite the historical National Semiconductor branding. Ensure the component meets AEC-Q100 standards if deployed in automotive contexts. Check for RoHS compliance status prior to integration into final assemblies.

Voltage Reference Selection Notes

Select this component when a fixed 3 V reference is required with ±0.5% initial accuracy. Consider the 100 ppm/°C temperature coefficient for thermal stability needs. Evaluate the 100 µA supply current against power budget constraints. Verify compatibility with the SOT-23-5 footprint during PCB layout planning.

Voltage Reference Part Context

This part belongs to the LM4128 family of precision micropower series voltage references. It shares architectural similarities with other variants in the series but differs in output voltage and accuracy grades. The 'C' designation typically indicates a specific accuracy bin, while 'Q1' denotes automotive qualification. The '/NOPB' suffix signifies lead-free and halogen-free construction compliant with environmental directives.

Voltage Reference Replacement Considerations

LM4128BQ1MF3.0/NOPB offers similar automotive qualification with tighter initial accuracy specifications. LM4128CMF3.0/NOPB provides comparable performance without automotive certification. LM4128DMFX3.0/NOPB represents a different accuracy grade within the same product family.