LM4041CIM3-1.2/NOPB

Overview

The LM4041CIM3-1.2/NOPB is a precision micropower shunt voltage reference manufactured by Texas Instruments, originally part of the National Semiconductor portfolio. It provides a fixed output voltage of 1.225 V with an initial accuracy of ±0.5% at 25°C. The device operates within a wide current range from 60 µA to 12 mA and features a maximum temperature coefficient of 150 ppm/°C. Designed for space-constrained applications, it utilizes a SOT-23-3 surface-mount package and requires no external stabilizing capacitor.

Feature Summary

• Provides stable 1.225 V reference voltage in sub-miniature packages
• Eliminates need for external stabilizing capacitor while tolerating capacitive loads
• Ensures high precision through bandgap curvature correction and low dynamic impedance

Applications

• Space-critical electronic designs requiring compact footprints
• Power-restricted systems utilizing ultra-low operating currents
• Precision measurement circuits demanding stable reference voltages across temperature ranges

Procurement Notes

Verify component authenticity by checking manufacturer markings against official datasheet specifications. Confirm the specific grade (C) matches the required tolerance of ±0.5%. Ensure the SOT-23-3 package variant aligns with PCB layout requirements. Cross-reference the NOPB suffix to confirm lead-free compliance and environmental standards before final procurement decisions.

Selection Notes

Select this component when a fixed 1.225 V reference is required in a small form factor. Consider the ±0.5% accuracy and 150 ppm/°C temperature coefficient for thermal stability needs. Evaluate the 60 µA minimum operating current against system power constraints. Compare against adjustable versions if variable voltage is needed instead of the fixed output.

Part Context

This component belongs to the LM4041-N series of precision micropower shunt references. It shares architectural similarities with the LM4040 series but offers a distinct 1.225 V fixed output option. The device represents a transition from National Semiconductor to Texas Instruments, maintaining functional compatibility while updating manufacturing processes and packaging options for modern surface-mount assembly.

Replacement Considerations

LM4041DIM3X-1.2/NOPB: Offers higher precision with ±0.1% accuracy in the same SOT-23 package. Suitable for applications requiring tighter tolerance than the standard C-grade version.