LM4041CIM3X-1.2

Overview

The LM4041CIM3X-1.2 is a precision micropower shunt voltage reference manufactured by Texas Instruments, featuring a fixed output of 1.225 V with an initial accuracy of ±0.5%. It operates within a temperature range of -40°C to +85°C and utilizes a SOT-23-3 surface-mount package. The device requires no external stabilizing capacitor for stability across any capacitive load. Key electrical parameters include a maximum operating current of 12 mA, a typical cathode current of 65 µA, and a noise level of 20 µVrms from 10 Hz to 10 kHz.

Feature Summary

• Eliminates the need for an external stabilizing capacitor while ensuring stability with any capacitive load
• Utilizes bandgap reference temperature drift curvature correction for stable reverse breakdown voltage accuracy
• Employs fuse and Zener-zap reverse breakdown or reference voltage trim during wafer sort to ensure strict accuracy

Applications

• Data acquisition systems
• Portable instruments
• Battery-powered equipment

Procurement Notes

Verify the specific suffix 'CIM3X' corresponds to the desired tape-and-reel packaging format and commercial grade temperature rating (-40°C to +85°C). Confirm that the 'NOPB' designation indicates lead-free and RoHS compliance if required by your manufacturing standards. Ensure the input voltage exceeds the reference voltage plus the minimum operating current drop across the series resistor.

Selection Notes

Select this component when space-constrained designs require a sub-miniature SOT-23 package. Choose this model over adjustable variants due to its fixed 1.225 V output, which simplifies circuit design. Consider the ±0.5% initial accuracy and 150 ppm/°C temperature coefficient for applications requiring moderate precision without the cost of higher-grade A or B specifications.

Part Context

This part belongs to the LM4041-N family of precision micropower shunt voltage references. The family offers both fixed and adjustable versions in SC-70 and SOT-23 packages. The LM4041-N series is designed to replace larger through-hole references in modern surface-mount assemblies, providing high performance in minimal footprint sizes for portable and industrial electronics.

Replacement Considerations

LM4041DIM3X-1.2/NOPB (±1% accuracy), LM4041BIM3X-1.2/NOPB (±0.2% accuracy), LM4041AIM3X-1.2/NOPB (±0.1% accuracy).