LM4128AQ1MFX1.8/NOPB

Voltage Reference Overview

The LM4128AQ1MFX1.8/NOPB is an automotive-grade precision micropower shunt voltage reference from Texas Instruments, featuring a fixed 1.8 V output in a compact SOT-23-5 package. It delivers high initial accuracy of 0.1% and a temperature coefficient of 75 ppm/°C, ensuring stable performance across the -40°C to +125°C operating range. The device operates with a low supply current of 60 µA and supports a maximum input voltage of 6 V. Certified under AEC-Q100 standards, it provides reliable regulation for sensitive analog circuits in demanding automotive environments.

Voltage Reference Feature Summary

• Automotive qualification compliant with AEC-Q100 standards for reliability
• High precision with 0.1% initial accuracy and 75 ppm/°C temperature coefficient
• Micropower operation with 60 µA supply current for energy efficiency

Voltage Reference Applications

• Automotive sensor signal conditioning
• Battery management systems
• Precision data acquisition circuits

Voltage Reference Procurement Notes

Verify the specific suffix 'AQ1' confirms automotive grade and AEC-Q100 certification. Ensure the '1.8' designation matches the required 1.8 V output voltage. Confirm the 'MFX' indicates the SOT-23-5 surface mount package. Check that 'NOPB' denotes lead-free and RoHS compliance. Validate the manufacturer as Texas Instruments to ensure component authenticity.

Voltage Reference Selection Notes

Select this component when automotive reliability and high precision are required in space-constrained designs. The 1.8 V output suits low-voltage logic interfaces. The 60 µA quiescent current makes it suitable for battery-powered applications. The SOT-23-5 package offers a small footprint compared to larger references. Consider the 75 ppm/°C drift if extreme thermal stability beyond standard automotive grades is needed.

Voltage Reference Part Context

This part belongs to the LM4128 family of precision shunt voltage references. The AQ1 variant specifically targets automotive electronics, distinguishing it from commercial or industrial grades. It shares the core architecture with other LM4128 models but includes enhanced testing and documentation for automotive quality requirements.

Voltage Reference Replacement Considerations

LM4128DMFX-1.8/NOPB (Commercial grade, same package/output)

Voltage Reference FAQ

What is the maximum input voltage for this reference?

The maximum series input voltage is 6 V.

Is this component qualified for automotive use?

Yes, it is AEC-Q100 qualified for automotive applications.