LM4128BQ1MFX3.0/NOPB

Voltage Reference Overview

The LM4128BQ1MFX3.0/NOPB is an automotive-grade series precision voltage reference manufactured by Texas Instruments. It provides a fixed output voltage of 3 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. Packaged in a compact SOT-23-5 surface-mount case, it consumes 60 µA of operating supply current. The component holds AEC-Q100 qualification for automotive applications.

Voltage Reference Feature Summary

• Automotive-grade reliability certified under AEC-Q100 standards
• High precision with 0.2% initial accuracy and low temperature drift
• Low power consumption suitable for battery-operated systems
• Compact SOT-23-5 package for space-constrained designs

Voltage Reference Applications

• Automotive electronic control units requiring stable reference voltages
• Data acquisition systems in vehicle instrumentation
• Analog-to-digital converter reference inputs in automotive sensors
• Precision measurement circuits in harsh thermal environments

Voltage Reference Procurement Notes

Verify the complete part number including suffixes such as 'NOPB' and 'MF' to ensure correct packaging and lead-free compliance. Confirm AEC-Q100 qualification status if automotive deployment is required. Check datasheet revisions for any updates to electrical characteristics or recommended operating conditions before finalizing procurement specifications.

Voltage Reference Selection Notes

Select this component when automotive certification and high precision are mandatory. The 3 V output suits interfaces requiring specific reference levels without external scaling. Consider the 100 ppm/°C temperature coefficient against application thermal profiles. Ensure input voltage remains below 6 V and shunt current does not exceed 20 mA for safe operation within specified limits.

Voltage Reference Part Context

This part belongs to the LM4128 family of micropower series voltage references. The 'BQ1' designation indicates automotive qualification and specific accuracy grades. The 'MF' suffix denotes the SOT-23-5 package type. The 'NOPB' indicates no lead-based plating. Variants exist with different output voltages and accuracy grades within the same family.

Voltage Reference Replacement Considerations

LM4128AQ1MFX3.0/NOPB offers higher initial accuracy (0.1%) but similar automotive qualification. LM4128DMFX3.0/NOPB is non-automotive grade with lower accuracy (1%). Verify pinout compatibility and thermal performance when substituting. Ensure replacement parts meet AEC-Q100 requirements if used in automotive systems.