LM4040BEX3-3.3-T

Overview

The LM4040BEX3-3.3-T is a micropower shunt voltage reference manufactured by Analog Devices Inc./Maxim Integrated, belonging to the LM4040B series. It provides a fixed output voltage of 3.3 V with an initial accuracy of 0.2%. 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 (SOT-323) surface-mount package and supports a cathode current range from 60 µA to 15 mA.

Feature Summary

• Provides stable fixed output voltage across industrial temperature ranges
• Ultra-low operating current suitable for power-constrained designs
• High precision accuracy at room temperature conditions
• Capable of driving capacitive loads without instability

Applications

• Portable battery-powered instrumentation
• Data acquisition systems requiring precise references
• Handheld meters and test equipment
• Telecommunications signal processing circuits

Procurement Notes

Verify component authenticity through authorized distribution channels due to potential supply constraints. Confirm specific suffix designations match exact performance requirements regarding accuracy grade and thermal characteristics. Ensure packaging format aligns with automated assembly capabilities. Cross-reference datasheet specifications against application load conditions to validate operational stability under varying environmental temperatures.

Selection Notes

Select this component when high precision combined with minimal power consumption is required in compact form factors. The SC-70-3 package offers space efficiency compared to larger alternatives. Consider the 0.2% accuracy grade for applications demanding tighter tolerance than standard general-purpose references while maintaining low quiescent current operation suitable for energy-sensitive environments.

Part Context

Part of the LM4040 family offering improved precision micropower shunt voltage references. Designed to replace older generation references while providing enhanced thermal stability and lower noise characteristics. Compatible with various analog-to-digital converter interfaces and sensor conditioning circuits requiring reliable baseline voltage sources.

Replacement Considerations

LM4040BEX3-3.3+T serves as a verified equivalent variant within the same product line.