LM4041QCEM3-1.2NO

Voltage Reference Overview

The LM4041QCEM3-1.2NO is a precision micropower shunt voltage reference manufactured by Texas Instruments, featuring a fixed nominal output of 1.225V. It utilizes an SOT-23-3 surface-mount package with three pins. The device offers an initial accuracy of ±0.5% and operates within an extended temperature range from -40°C to +125°C. Key electrical parameters include a maximum shunt current of 12mA, a typical minimum operating current of 45µA, and a maximum temperature coefficient of 150ppm/°C. It is AEC-Q100 qualified for automotive applications.

Voltage Reference Feature Summary

• Stable operation with any capacitive load without requiring external stabilizing capacitors
• Low dynamic impedance and low noise characteristics for stable reverse breakdown voltage
• Automotive qualification compliant with AEC-Q100 standards
• Precision trimming via fuse and Zener-zap techniques ensures tight initial accuracy

Voltage Reference Applications

• Automotive electronics systems
• Data acquisition systems
• Power supply monitoring circuits
• Battery-powered portable devices
• Process control instrumentation

Voltage Reference Procurement Notes

Verify the specific suffix 'Q' indicates AEC-Q100 automotive qualification and 'C' denotes the C-grade accuracy tier when sourcing. Confirm the 'NO' suffix aligns with RoHS compliance requirements. Ensure the ordering part number matches the exact package type and temperature rating specified in the design documentation to avoid functional mismatches.

Voltage Reference Selection Notes

Select this component for designs requiring automotive-grade reliability and space-constrained SOT-23 packaging. The C-grade accuracy provides a balance between cost and performance for general precision applications. Consider the 12mA maximum shunt current limit when designing bias networks to ensure the device remains within its safe operating area under all load conditions.

Voltage Reference Part Context

This part belongs to the LM4041-N family of precision micropower shunt voltage references. The family includes both fixed and adjustable versions available in SC-70 and SOT-23 packages. The LM4041 series is designed for applications demanding high stability over wide temperature ranges and low power consumption, serving as a reliable reference for analog-to-digital converters and sensor interfaces.

Voltage Reference Replacement Considerations

LM4041CIM3-1.2/NOPB: Non-automotive grade equivalent with similar electrical specifications but lacking AEC-Q100 qualification.