LM4040AEX3-4.1

Overview

The LM4040AEX3-4.1 is a micropower shunt voltage reference manufactured by Analog Devices Inc./Maxim Integrated. It provides a fixed output voltage of 4.096 V with an initial accuracy of 0.1%. The device operates within a temperature range of -40°C to +125°C and features a maximum temperature coefficient of 70 ppm/°C. It utilizes an SC-70-3 surface-mount package and supports a maximum shunt current of 15 mA.

Feature Summary

• Provides high precision with 0.1% initial accuracy at 25°C
• Operates over the extended industrial temperature range from -40°C to +125°C
• Features ultra-low operating current suitable for power-restricted designs
• Maintains stability when used with capacitive loads

Applications

• Portable battery-powered equipment requiring low quiescent current
• Handheld instruments needing stable reference voltages
• Data acquisition systems utilizing analog-to-digital converters
• Temperature measurement circuits

Procurement Notes

Verify the specific suffix EX3 indicates the SC-70-3 package configuration. Confirm that the A grade corresponds to the 0.1% accuracy specification required for the design. Ensure the manufacturer designation matches Analog Devices or Maxim Integrated as sources may vary. Check RoHS compliance status for environmental regulations.

Selection Notes

Select this component when a fixed 4.096 V reference with tight tolerance is necessary. The SC-70-3 package offers space efficiency compared to larger options. Consider the 70 ppm/°C temperature coefficient for thermal stability requirements. The low operating current makes it suitable for applications where power consumption must be minimized.

Part Context

This part belongs to the LM4040 family of micropower shunt voltage references. The family includes variants with different accuracies such as 0.2%, 0.5%, and 1%. Other packages like SOT-23-3 are available within the same series. The LM4040A specifically denotes the highest precision tier in the lineup.

Replacement Considerations

LM4040BIM3-4.1+T offers 0.2% accuracy in an SOT-23-3 package. LM4040DIX3-4.1-T provides 1% accuracy in an SC-70-3 package. Verify package compatibility and accuracy requirements before substitution.