LM4040CEM3-3.0-T

Overview

The LM4040CEM3-3.0-T is a micropower shunt voltage reference manufactured by Analog Devices Inc./Maxim Integrated, designed for precision applications requiring stable output voltages. It provides a fixed 3 V output with an initial accuracy of 0.5% and a maximum temperature coefficient of 20 PPM/°C. The device operates within a wide temperature range from -40°C to +125°C and supports a maximum shunt current of 15 mA. Packaged in a compact SOT-23-3 surface-mount format, it ensures reliable performance in space-constrained designs while maintaining low operating currents suitable for power-sensitive systems.

Feature Summary

• Provides a stable 3 V reference voltage with high precision across industrial temperature ranges
• Features ultra-low operating current ideal for battery-powered or power-restricted designs
• Compact SOT-23-3 package enables efficient PCB layout in space-constrained applications

Applications

• Portable electronic devices requiring precise voltage regulation
• Battery-operated instrumentation and measurement systems
• Data acquisition systems needing stable reference sources
• Industrial control circuits with strict temperature stability requirements

Procurement Notes

Verify the manufacturer designation as Analog Devices Inc./Maxim Integrated when sourcing this component. Confirm the package type is SOT-23-3 and the output voltage is exactly 3 V. Ensure the temperature coefficient does not exceed 20 PPM/°C for your specific application needs. Check RoHS compliance status if required by your manufacturing standards. Validate that the initial accuracy meets the 0.5% specification before integration into critical circuits.

Selection Notes

Select this component when a fixed 3 V reference with 0.5% accuracy is required in a small SOT-23-3 package. It is suitable for applications demanding low quiescent current and operation up to 125°C. Consider alternatives only if higher accuracy or different voltage levels are needed. Verify thermal management requirements given the 15 mA maximum shunt current capability.

Part Context

Part of the LM4040 family of micropower shunt voltage references known for high precision and low power consumption. The C suffix indicates 0.5% initial accuracy, while EM3 denotes the SOT-23-3 package. This series offers multiple voltage options including 2.048 V, 2.5 V, 4.096 V, and 5.0 V variants. Designed for general-purpose precision applications where size and power efficiency are critical factors.

Replacement Considerations

LM4040CEM3-3.0/NOPB is a direct replacement with identical specifications and packaging. Other LM4040 variants with different accuracies (A, B, D) may be used if tolerance requirements allow. Ensure any substitute maintains the same 3 V output and SOT-23-3 form factor for mechanical compatibility.