LM4040AEM3-2.5

Overview

The LM4040AEM3-2.5 is a micropower shunt voltage reference manufactured by Analog Devices Inc./Maxim Integrated, housed in an SC-70-3 (SOT-323) surface-mount package. It provides a fixed output voltage of 2.5 V with an initial accuracy of ±0.1%. The device operates over an extended industrial temperature range from -40°C to +125°C and features a maximum temperature coefficient of 30 ppm/°C. Key electrical specifications include a minimum operating current of 60 µA and a maximum shunt current of 15 mA.

Feature Summary

• Provides high precision with ±0.1% initial accuracy for stable reference performance
• Operates at ultra-low currents suitable for power-constrained designs
• Maintains stability across the full industrial temperature range (-40°C to +125°C)
• Features low noise characteristics for sensitive analog applications

Applications

• Portable battery-powered instrumentation
• Data acquisition systems requiring precise references
• Handheld meters and test equipment
• Temperature measurement circuits

Procurement Notes

Verify the manufacturer designation carefully, as this component is produced under both Maxim Integrated and Analog Devices branding following their merger. Confirm the specific suffix 'AEM3' corresponds to the SC-70-3 package and 2.5V output variant. Check current availability status as supply conditions may vary between distributors.

Selection Notes

Select this component when space-saving is critical due to its compact SC-70-3 footprint. It is appropriate for designs requiring ±0.1% accuracy and operation up to +125°C. Ensure the circuit can accommodate the minimum 60 µA operating current requirement while staying within the 15 mA maximum shunt current limit.

Part Context

This part belongs to the LM4040 family of improved precision micropower shunt voltage references. The family offers various accuracy grades (A, B, C, D) and output voltages including 2.048 V, 2.5 V, 3.0 V, 4.096 V, and 5.0 V. The LM4040 series is designed to replace older discrete reference solutions in modern compact electronics.

Replacement Considerations

LM4040BIM3-2.5+T: Offers similar functionality but with ±0.2% accuracy and a higher temperature coefficient of 100 ppm/°C.