LM4040CIM3-3.0

Overview

The LM4040CIM3-3.0 is a micropower shunt voltage reference manufactured by Analog Devices Inc./Maxim Integrated, housed in an SOT-23-3 package. It provides a fixed output voltage of 3.0 V with an initial accuracy of ±0.5%. The device operates within a temperature range of -40°C to +85°C and features a maximum temperature coefficient of 100 ppm/°C. Key electrical specifications include a maximum shunt current of 15 mA, a minimum operating cathode current of 60 µA, and a typical noise level of 45 µVrms from 10 Hz to 10 kHz.

Feature Summary

• Provides stable reference voltage across industrial temperature ranges
• Ultra-low power consumption suitable for battery-operated systems
• Compact surface-mount packaging for space-constrained designs

Applications

• Portable instrumentation requiring low power supply
• Battery-powered measurement devices
• Data acquisition systems needing precise voltage references

Procurement Notes

Verify the manufacturer designation carefully, as the LM4040 series was originally Maxim Integrated and is now part of Analog Devices Inc. Confirm the suffix 'T' indicates tape-and-reel packaging if required for automated assembly. Ensure the specific grade matches the required accuracy and temperature coefficient for your application design.

Selection Notes

Select this component when a 3.0 V reference is needed with moderate precision (±0.5%). Consider higher grades like the LM4040AIM3 for tighter tolerances or lower temperature coefficients. Verify that the 15 mA maximum shunt current meets the load requirements and that the SOT-23-3 footprint fits the PCB layout constraints.

Part Context

This component belongs to the LM4040 family of micropower shunt voltage references. The family offers various output voltages and accuracy grades, including 0.1%, 0.2%, 0.5%, and 1% options. The CIM3 variant specifically denotes the 0.5% accuracy grade in the SOT-23-3 package, designed for general-purpose precision applications where size and power are critical factors.

Replacement Considerations

LM4040CIM3-3.0+T is a direct equivalent part number often used interchangeably. Other LM4040 variants with different accuracies (e.g., AIM3, BIM3) may fit electrically but require verification of tolerance and drift specifications.