LM4128AQ1MFX4.1/NOPB

Voltage Reference Overview

The LM4128AQ1MFX4.1/NOPB is an automotive-grade series precision voltage reference IC manufactured by Texas Instruments. It provides a fixed output voltage of 4.096 V with an initial accuracy of 0.1%. The device operates within a 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 AEC-Q100 standards
• High precision series voltage reference architecture
• Compact SOT-23-5 surface-mount packaging

Voltage Reference Applications

• Automotive electronic systems requiring stable reference voltages
• Precision analog-to-digital converter (ADC) references
• Data acquisition systems in harsh environments

Voltage Reference Procurement Notes

Verify the specific suffix 'Q1' confirms automotive qualification and 'A' indicates 0.1% accuracy. Confirm 'MF' denotes the SOT-23-5 package and 'X' specifies tape-and-reel delivery. Ensure the part number matches the required 4.096V output and check for RoHS compliance details in the official datasheet before procurement.

Voltage Reference Selection Notes

Select this component when high accuracy (0.1%) and automotive certification are mandatory. The 4.096V output suits applications needing precise scaling for ADCs or DACs. Consider the low operating current and small footprint if space and power constraints are critical design factors.

Voltage Reference Part Context

This part belongs to the LM4128 family of micropower shunt voltage references. The 'Q1' designation signifies it is designed for automotive use, while the 'A' grade ensures tighter initial accuracy compared to standard grades. It serves as a stable reference source for precision measurement circuits in vehicle electronics.

Voltage Reference Replacement Considerations

Direct substitutes include other LM4128 variants with matching voltage and accuracy, such as LM4128BQ1MFX4.1/NOPB (0.2% accuracy) or LM4128DQ1MFX4.1/NOPB (1% accuracy), provided the looser tolerance is acceptable for the application.