LM4128CQ1MFX4.1/NOPB

Voltage Reference Overview

The LM4128CQ1MFX4.1/NOPB is an automotive-grade series voltage reference manufactured by Texas Instruments, designed for precision applications requiring stable output voltages in harsh environments. This component delivers a fixed output of 4.096 V with an initial accuracy of 0.5% and a temperature coefficient of 100 ppm/°C. It operates within a supply voltage range of 3.4 V to 5.5 V and supports a maximum shunt current of 20 mA. The device features low power consumption with a typical operating supply current of 100 µA. Certified under AEC-Q100 standards, it ensures reliability for automotive systems. Housed in a compact SOT-23-5 surface-mount package, it functions reliably across an extended temperature range from -40°C to +125°C.

Voltage Reference Feature Summary

• Automotive qualification compliant with AEC-Q100 standards for enhanced reliability in vehicle electronics.
• Precision series voltage reference architecture providing stable output with low noise characteristics.
• Compact SOT-23-5 surface-mount packaging optimized for space-constrained printed circuit board designs.

Voltage Reference Applications

• Automotive sensor signal conditioning circuits requiring precise voltage references.
• Data acquisition systems utilizing analog-to-digital converters needing stable reference sources.
• Battery management systems monitoring cell voltages with high accuracy requirements.

Voltage Reference Procurement Notes

Verify the specific suffix 'C' indicates the 0.5% initial accuracy grade when sourcing replacements. Confirm the 'Q1' designation aligns with required automotive qualification levels for your application. Ensure the 'MF' package code matches your PCB footprint design constraints. Check RoHS compliance status against environmental regulations applicable to your region. Validate that the 4.096 V output voltage meets the system's reference input specifications before procurement.

Voltage Reference Selection Notes

Select this component when automotive reliability and moderate precision are required without the cost of higher-grade accuracies. The 0.5% tolerance suits applications where system calibration can compensate for minor reference deviations. Consider the 100 ppm/°C temperature coefficient for environments with significant thermal fluctuations. The 100 µA quiescent current makes it suitable for battery-powered devices where power efficiency is critical. Ensure the input voltage remains within the 3.4 V to 5.5 V operational window for proper regulation.

Voltage Reference Part Context

This part belongs to the LM4128 family of micropower shunt voltage references, which are widely used in industrial and automotive sectors. The LM4128 series offers various output voltages and accuracy grades to suit different design needs. The 'C' variant specifically provides 0.5% accuracy, balancing performance and cost. The 'Q1' suffix denotes automotive qualification, distinguishing it from commercial variants. The 'NOPB' indicates lead-free and rohs-compliant manufacturing.

Voltage Reference Replacement Considerations

LM4128CQ1MF4.1/NOPB