LM4128BQ1MFX4.1/NOPB

Voltage Reference Overview

The LM4128BQ1MFX4.1/NOPB is an automotive-grade precision shunt voltage reference manufactured by Texas Instruments. It provides a fixed output voltage of 4.096 V with an initial accuracy of 0.2% and a temperature coefficient of 100 PPM/°C. The device operates within a supply voltage range up to 6 V and supports a maximum shunt current of 20 mA. It functions reliably across an extended temperature range from -40°C to +125°C. The component consumes a typical quiescent current of 60 µA and is housed in a compact SOT-23-5 surface-mount package. It holds AEC-Q100 qualification for automotive applications.

Voltage Reference Feature Summary

• Automotive-grade reliability certified under the AEC-Q100 standard for robust performance in vehicle environments.
• High-precision voltage regulation with tight initial accuracy tolerances suitable for sensitive analog circuits.
• Low power consumption design optimized for battery-operated systems and energy-efficient applications.

Voltage Reference Applications

• Automotive electronic control units requiring stable reference voltages
• Data acquisition systems utilizing high-resolution analog-to-digital converters
• Portable instrumentation powered by limited energy sources

Voltage Reference Procurement Notes

Verify the complete part number including suffixes such as 'NOPB' and 'MFX' to ensure correct packaging and lead-free compliance. Confirm that the specific accuracy grade matches the circuit requirements, as variations exist within the family. Check for RoHS compliance status through official manufacturer documentation before integration into production designs.

Voltage Reference Selection Notes

Select this component when automotive certification and high precision are required simultaneously. The 4.096 V output aligns well with common ADC input ranges. Ensure the PCB layout accommodates the SOT-23-5 footprint and thermal dissipation needs given the 20 mA maximum shunt current capability.

Voltage Reference Part Context

This part belongs to the LM4128-Q1 series of precision shunt references designed specifically for automotive electronics. It shares architectural similarities with other members of the family but differs in output voltage and accuracy grades. The series is characterized by low noise and excellent long-term stability, making it a standard choice for critical measurement nodes in automotive sensor interfaces.

Voltage Reference Replacement Considerations

Direct substitutes include LM4128BQ1MF4.1/NOPB (cut tape) or LM4128DQ1MF4.1/NOPB (1% accuracy). Verify pin compatibility and thermal characteristics when swapping between different accuracy grades or packaging types within the same series.