LM4128DQ1MF4.1/NOPB

Voltage Reference Overview

The LM4128DQ1MF4.1/NOPB is an automotive-grade series precision voltage reference manufactured by Texas Instruments, formerly National Semiconductor. It provides a fixed output voltage of 4.096 V with an initial accuracy of 1%. The device features a temperature coefficient of 100 ppm/°C and operates within a junction temperature range of -40°C to +125°C. It supports a maximum input voltage of 6 V and a maximum shunt current of 20 mA. Packaged in a SOT-23-5 surface-mount case, it holds AEC-Q100 qualification for automotive applications.

Voltage Reference Feature Summary

• AEC-Q100 qualified for automotive reliability standards
• Micropower series architecture with low operating current
• High precision fixed output voltage stability

Voltage Reference Applications

• Automotive electronic systems requiring stable reference voltages
• Data acquisition systems needing precise voltage benchmarks
• Portable instrumentation utilizing battery-powered circuits

Voltage Reference Procurement Notes

Verify the manufacturer designation as Texas Instruments, which acquired National Semiconductor, when sourcing this component. Confirm the specific suffix 'NOPB' indicates lead-free and RoHS compliance status. Ensure the package type matches the required SOT-23-5 footprint for PCB layout compatibility. Check for AEC-Q100 certification documentation if the application mandates automotive grade validation.

Voltage Reference Selection Notes

Select this part when a 4.096 V reference with 1% initial accuracy is required for space-constrained designs. The SOT-23-5 package offers a compact solution for surface-mount assembly. Consider the 100 ppm/°C temperature coefficient against environmental thermal variations. The 20 mA maximum shunt current capability allows for moderate load driving without excessive power dissipation.

Voltage Reference Part Context

This component belongs to the LM4128 family of micropower series voltage references. The family includes variants with different output voltages and accuracy grades, such as 1.25 V, 2.5 V, and 5.0 V options. The 'DQ1' designation typically denotes specific temperature and accuracy grades within the automotive subset of this product line.

Voltage Reference Replacement Considerations

Direct substitutes include other LM4128 variants with matching 4.096 V output and similar accuracy, such as LM4128AIMF4.1/NOPB or LM4128BIMF4.1/NOPB, provided they meet the same automotive qualification requirements.