LM4041CIX3-1.2-T

Overview

The LM4041CIX3-1.2-T is a precision micropower shunt voltage reference manufactured by Analog Devices Inc./Maxim Integrated. It provides a fixed reverse breakdown voltage of 1.225V with an initial accuracy of 0.5% at +25°C and a maximum temperature coefficient of 100ppm/°C. The device operates within a wide current range of 60µA to 12mA, ensuring stable performance across industrial temperatures from -40°C to +85°C. Packaged in a subminiature 3-pin SC70 surface-mount footprint (1.8mm x 1.8mm), it eliminates the need for external stabilizing capacitors while tolerating any capacitive load.

Feature Summary

• Ultra-small 3-pin SC70 package designed for space-critical applications
• Laser-trimmed resistors ensure precise initial accuracy without requiring external components
• Capable of operating with any capacitive load without external stabilization
• Bandgap reference design maintains stability over a wide operating current range

Applications

• Portable, battery-powered equipment
• Notebook computers
• Cell phones
• Industrial process controls

Procurement Notes

Verify that the ordering suffix matches the required temperature grade (-I_ for -40°C to +85°C) and package type (X3 for SC70). Confirm lead-free/RoHS compliance status if applicable. Ensure the specific part number corresponds to the desired accuracy grade (C for 0.5%). Check manufacturer documentation for pinout details, specifically regarding Pin 3 which must be left floating or connected to Pin 2.

Selection Notes

Select this component when a fixed 1.225V reference is needed in a minimal footprint. The C-grade offers 0.5% initial accuracy suitable for general precision tasks. Consider the 60µA minimum operating current for low-power designs. Verify that the application does not require extended temperature ranges beyond +85°C, as the 'I' suffix denotes industrial grade only.

Part Context

This device belongs to the LM4041 family of improved precision micropower shunt voltage references. It serves as a compact alternative to larger SOT23 packages, offering a 50% smaller footprint. The family includes various accuracy grades (A, B, C, D) and temperature ranges (Industrial and Extended), allowing designers to balance cost, size, and performance requirements.

Replacement Considerations

LM4041BIX3-1.2-T (0.2% accuracy)

FAQ

Does the LM4041CIX3-1.2-T require an external capacitor for stability?

No, the LM4041 does not require an external stabilizing capacitor and is guaranteed to be stable with any capacitive load.

What is the function of Pin 3 on the SC70 package?

Pin 3 is designated as N.C. (Not Connected). It must be left floating or connected to Pin 2 (Negative Terminal).