LM4128CQ1MFX2.0/NOPB

Voltage Reference Overview

The LM4128CQ1MFX2.0/NOPB is an automotive-grade series precision voltage reference manufactured by Texas Instruments. It provides a fixed output voltage of 2.048 V with an initial accuracy of ±0.5%. The device operates within a supply voltage range of 3.4 V to 5.5 V and supports a maximum shunt current of 20 mA. It features a temperature coefficient of 100 ppm/°C and consumes 100 µA of supply current. Qualified under AEC-Q100 standards, it functions reliably between -40°C and +125°C in a compact SOT-23-5 surface-mount package.

Voltage Reference Feature Summary

• Automotive qualification compliant with AEC-Q100 standards for reliable operation in vehicle environments.
• Precision series regulation architecture delivering stable reference voltage with low noise characteristics.
• Compact SOT-23-5 surface-mount packaging designed for space-constrained circuit board layouts.

Voltage Reference Applications

• Automotive electronic systems requiring certified voltage references
• Analog-to-digital converter (ADC) reference inputs
• Data acquisition system signal conditioning

Voltage Reference Procurement Notes

Verify the specific suffix 'C' indicates the ±0.5% accuracy grade distinct from other variants. Confirm the 'AQ1' designation aligns with required automotive reliability standards. Ensure the 'MF' package code matches the intended SOT-23-5 footprint. Validate the 'NOPB' lead-free status against environmental compliance requirements before finalizing procurement specifications.

Voltage Reference Selection Notes

Select this component when a fixed 2.048 V reference with ±0.5% tolerance is required for automotive applications. It is suitable for designs needing AEC-Q100 certification and operation up to 125°C junction temperature. Choose this part over higher accuracy grades if cost efficiency is prioritized while maintaining automotive reliability standards.

Voltage Reference Part Context

This part belongs to the LM4128 family of precision shunt voltage references. It shares the core architecture with variants offering different accuracy grades and output voltages. The LM4128 series is widely used in industrial and automotive applications where stable reference voltages are critical for measurement accuracy and system performance.

Voltage Reference Replacement Considerations

LM4128BQ1MFX2.0/NOPB offers 0.2% accuracy. LM4128DQ1MFX2.0/NOPB provides 1% accuracy. LM4128AQ1MFX2.0/NOPB delivers 0.1% accuracy. All share identical pinouts and electrical characteristics except for initial accuracy tolerance.