LM4128AQ1MF3.3/NOPB

Voltage Reference Overview

The LM4128AQ1MF3.3/NOPB is an automotive-grade precision series voltage reference IC manufactured by Texas Instruments. It provides a fixed output voltage of 3.3V with an initial accuracy of ±0.1%. The device operates within a supply voltage range of 3.7V to 5.5V and draws a typical quiescent current of 100µA. It features a maximum shunt current of 20mA and a temperature coefficient of 75ppm/°C. The component is qualified under AEC-Q100 standards for automotive applications, ensuring reliability across a junction temperature range of -40°C to +125°C. It is housed in a compact SOT-23-5 surface-mount package.

Voltage Reference Feature Summary

• Automotive qualification compliant with AEC-Q100 standards for enhanced reliability
• High precision performance with ±0.1% initial accuracy tolerance
• Low power consumption suitable for battery-operated systems
• Compact SOT-23-5 surface-mount packaging for space-constrained designs

Voltage Reference Applications

• Automotive electronic control units requiring stable voltage references
• Precision analog-to-digital converter (ADC) reference sources
• Data acquisition systems in harsh thermal environments
• Portable instrumentation powered by single-cell batteries

Voltage Reference Procurement Notes

Verify the specific suffix 'NOPB' confirms lead-free status and compliance with RoHS directives as per manufacturer specifications. Confirm that the 'Q1' designation aligns with required automotive grade certifications for your application. Ensure ordering quantities match available packaging options such as cut tape or reel formats provided by distributors. Cross-check the part number against the latest datasheet revision to ensure pinout and electrical characteristics remain unchanged.

Voltage Reference Selection Notes

Select this component when a fixed 3.3V reference with high accuracy is required in automotive or industrial settings. The low quiescent current makes it suitable for energy-efficient designs. Consider the input voltage range limits; the minimum operating voltage is 3.7V, so ensure the supply rail exceeds this threshold. The SOT-23-5 package offers a small footprint but requires adequate thermal management if operating near maximum temperature limits.

Voltage Reference Part Context

This part belongs to the LM4128 family of micropower series voltage references from Texas Instruments. The 'A' in the model number indicates automotive grade qualification, while 'Q1' specifies the accuracy bin. The 'MF' suffix denotes the SOT-23-5 package type. This series is designed to replace older discrete reference solutions with integrated, high-performance alternatives suitable for modern embedded systems.

Voltage Reference Replacement Considerations

LM4128AQ1MF3.0/NOPB: Different output voltage (3.0V). LM4128AQ1MF2.5/NOPB: Different output voltage (2.5V). LM4128AQ1MF1.8/NOPB: Different output voltage (1.8V). LM4128AQ1MF2.0/NOPB: Different output voltage (2.048V). LM4128BQ1MF3.3/NOPB: Lower accuracy (±0.2%). LM4128DMFX-3.3/NOPB: Non-automotive grade.