LM4040AEM3-4.1

Overview

The LM4040AEM3-4.1 is a micropower shunt voltage reference manufactured by Analog Devices Inc./Maxim Integrated, providing a fixed output of 4.096 V. It features an initial accuracy of 0.1% and a temperature coefficient of 20 ppm/°C. The device operates within a current range from a minimum cathode current of 73 µA to a maximum shunt current of 15 mA. It supports an extended industrial temperature range from -40°C to +125°C and is housed in a compact SOT-23-3 surface-mount package.

Feature Summary

• Delivers high precision with 0.1% initial accuracy for demanding measurement applications
• Maintains stability across the full industrial temperature range (-40°C to +125°C)
• Operates at ultra-low currents suitable for power-constrained designs

Applications

• Portable instrumentation requiring low power consumption
• Battery-powered data acquisition systems
• Precision analog-to-digital converter references

Procurement Notes

Verify the specific suffix 'EM3' against official datasheets to confirm the exact temperature grade and package variant, as manufacturer nomenclature may vary between Maxim Integrated and Texas Instruments generations. Ensure compatibility with existing PCB footprints for the SOT-23-3 package before finalizing procurement orders.

Selection Notes

Select this component when strict 0.1% accuracy and low temperature drift are required alongside minimal quiescent current. Compare against the LM4040B series if slightly lower accuracy but potentially different noise characteristics are acceptable. Verify that the 73 µA minimum operating current meets the lowest load conditions of the target circuit design.

Part Context

This part belongs to the LM4040 family of micropower shunt voltage references, designed to replace older bandgap references with higher precision and lower power consumption. The LM4040A variant specifically targets applications requiring tighter tolerance than standard commercial grades, offering improved thermal stability over the industrial range.

Replacement Considerations

LM4040BIM3-4.1+T offers similar functionality with 0.2% accuracy; verify if the relaxed tolerance meets system requirements.