LM4128CQ1MF4.1/NOPB

Voltage Reference Overview

The LM4128CQ1MF4.1/NOPB is an automotive-grade series precision voltage reference manufactured by Texas Instruments. It provides a fixed output voltage of 4.096 V with an initial accuracy of 0.5%. The device operates within a junction temperature range of -40°C to +125°C and features a maximum shunt current of 20 mA. It is housed in a SOT-23-5 surface-mount package and meets AEC-Q100 qualification standards for automotive applications.

Voltage Reference Feature Summary

• Automotive-grade reliability certified under the AEC-Q100 standard for robust performance in vehicle environments.
• Series precision architecture delivers stable reference voltage with low noise characteristics suitable for sensitive analog circuits.
• Compact SOT-23-5 surface-mount footprint enables efficient space utilization on high-density printed circuit boards.

Voltage Reference Applications

• Data acquisition systems requiring precise voltage references for signal conditioning.
• Automotive electronic control units (ECUs) needing reliable power management components.
• Portable instrumentation utilizing battery-powered operation where low quiescent current is critical.

Voltage Reference Procurement Notes

Verify the specific suffix 'C' indicates the 0.5% initial accuracy grade, distinct from other tolerance variants like 'A' or 'B'. Confirm the 'Q1' designation aligns with required automotive qualification standards for your specific application environment. Ensure the SOT-23-5 package matches your PCB footprint design constraints before finalizing procurement orders.

Voltage Reference Selection Notes

Select this component when a 4.096 V reference is required with moderate precision (0.5%) in automotive settings. Compare against higher accuracy grades if tighter tolerances are needed, or lower cost options if automotive certification is not mandatory. Consider the 20 mA shunt current limit to ensure adequate load regulation for your downstream circuitry requirements.

Voltage Reference Part Context

This part belongs to the LM4128 family of micropower shunt voltage references designed for high-precision applications. The LM4128 series offers various output voltages and accuracy grades, with the 'C' variant providing a balance between performance and cost. The 'NOPB' suffix indicates lead-free and RoHS-compliant manufacturing, adhering to modern environmental standards for electronic components.

Voltage Reference Replacement Considerations

Direct substitutes include other LM4128 variants with different accuracy grades such as LM4128AQ1MF4.1/NOPB or LM4128BQ1MF4.1/NOPB, provided the tolerance difference is acceptable. Cross-brand alternatives may require verification of pinout compatibility and thermal performance characteristics to ensure seamless integration without redesigning the host circuit board.