LM4041DIM3-1.2-TR

Voltage Reference Overview

The LM4041DIM3-1.2-TR is a precision micropower shunt voltage reference manufactured by Microchip Technology, housed in a compact 3-pin SOT-23 surface-mount package. It provides a fixed reverse-breakdown output voltage of 1.225V at a test current of 100 µA and 25°C. The device operates within an industrial temperature range of -40°C to +85°C. Minimum operating current is specified as 65 µA, with a maximum operating current limit of 12 mA. The D-grade variant offers a reverse-breakdown voltage tolerance of ±1% and a maximum average temperature coefficient of 150 ppm/°C.

Voltage Reference Feature Summary

• Bandgap reference architecture with temperature drift curvature correction for stable accuracy across wide operating temperatures and currents
• Capable of tolerating capacitive loads without requiring external stabilizing capacitors
• Low dynamic impedance design ensures consistent reverse breakdown voltage stability under varying load conditions

Voltage Reference Applications

• Battery-powered equipment
• Data acquisition systems
• Precision audio components
• Process control instrumentation

Voltage Reference Procurement Notes

Verify the specific grade suffix 'D' corresponds to the required ±1% initial accuracy and 150 ppm/°C temperature coefficient specifications. Confirm that the 'TR' suffix indicates tape-and-reel packaging suitable for automated assembly processes. Ensure the selected component matches the 1.225V fixed output requirement rather than the adjustable version.

Voltage Reference Selection Notes

Select this component when space constraints necessitate a subminiature SOT-23 footprint while maintaining high precision requirements. The low minimum operating current of 65 µA makes it suitable for power-sensitive designs. Verify that the maximum 12 mA operating current aligns with the thermal dissipation capabilities of the target PCB layout.

Voltage Reference Part Context

This part belongs to the LM4040/LM4041 family of precision micropower shunt voltage references. While the LM4040 series offers higher voltage options up to 5.000V with a 15 mA maximum current, the LM4041 series is specifically designed for the 1.225V fixed output or adjustable configurations with a 12 mA maximum current limit.

Voltage Reference Replacement Considerations

LM4041CYM3-1.2-TR (Microchip C-grade)

Voltage Reference FAQ

How does the LM4041 handle capacitive loads?

The advanced design allows the device to remain stable when used with capacitive loads, eliminating the need for an external stabilizing capacitor.

What is the function of Pin 3 on the SOT-23 package?

Pin 3 is not internally connected and must be left floating or connected to Pin 2 (Anode) to prevent issues with the parasitic Schottky diode between Pin 2 and the die attach interface.