LM4040DEM3-2.1-T

Overview

The LM4040DEM3-2.1-T is a micropower shunt voltage reference manufactured by Analog Devices Inc./Maxim Integrated, housed in an SOT-23-3 surface-mount package. It provides a fixed output voltage of 2.1 V with an initial accuracy of 1%. The device operates within a temperature range of -40°C to +85°C and features a maximum temperature coefficient of 150 ppm/°C. It supports a cathode current range from 67 µA to 15 mA, ensuring stable performance under varying load conditions while maintaining low power consumption.

Feature Summary

• Provides a precise 2.1 V reference voltage with 1% initial accuracy for reliable circuit operation.
• Operates with ultra-low quiescent current, making it suitable for battery-powered and power-constrained designs.
• Maintains stability when driving capacitive loads without oscillation.
• Designed for industrial temperature environments ranging from -40°C to +85°C.

Applications

• Portable instrumentation requiring low-power voltage references
• Battery-operated measurement systems
• Data acquisition systems needing stable analog references
• Temperature sensing circuits

Procurement Notes

Verify the manufacturer marking and date code upon receipt to ensure authenticity. Confirm that the received component matches the LM4040DEM3-2.1-T specification sheet regarding pinout and electrical characteristics. Check for physical damage to the SOT-23-3 leads before soldering. Ensure storage conditions comply with moisture sensitivity level requirements to prevent package integrity issues during reflow.

Selection Notes

Select this component when a 2.1 V fixed reference is required in a compact SOT-23-3 footprint. It is appropriate for applications prioritizing low current draw over high precision. Consider the 1% tolerance and 150 ppm/°C temperature coefficient against stricter requirements; if higher accuracy is needed, explore the LM4040A or B series variants instead.

Part Context

This part belongs to the LM4040 family of micropower shunt voltage references. The 'DE' suffix indicates the 2.1 V output voltage option with 1% initial accuracy. The 'M3' denotes the SOT-23-3 package type, and '+T' signifies tape-and-reel packaging. This family is designed for space-saving and low-power applications across industrial and commercial sectors.

Replacement Considerations

Direct substitutes include other LM4040 variants with different voltages or accuracies, such as LM4040BIM3-2.5+T for 2.5V/0.2% accuracy. Cross-manufacturer equivalents may exist but require verification of pinout compatibility and thermal performance specifications.