LM4040CEX3-3.0+T

Overview

The LM4040CEX3-3.0+T is a micropower shunt voltage reference manufactured by Analog Devices Inc./Maxim Integrated. It provides a fixed output voltage of 3.0 V with an initial accuracy of 0.5%. The device operates within a temperature range of -40°C to +125°C and features a maximum temperature coefficient of 70 ppm/°C. It supports a maximum shunt current of 15 mA and requires a minimum operating current of 60 µA. The component is housed in a compact SOT-23-3 surface-mount package, designed for space-constrained applications requiring stable precision references.

Feature Summary

• Provides high-precision fixed voltage output suitable for demanding measurement environments
• Operates reliably across the full industrial temperature range without performance degradation
• Designed for ultra-low power consumption ideal for battery-powered systems

Applications

• Portable instrumentation requiring precise voltage standards
• Battery-operated equipment with strict power constraints
• Data acquisition systems needing stable reference sources

Procurement Notes

Verify the specific suffix EX3 indicates the SC-70-3 package variant rather than the standard SOT-23-3 configuration found in other LM4040 versions. Confirm that the C grade corresponds to the 0.5% initial accuracy specification required for your design. Ensure compatibility with the 70 ppm/°C temperature coefficient limits defined in the official datasheet before finalizing procurement orders.

Selection Notes

Select this component when a 3.0 V reference is needed with 0.5% accuracy in a small footprint. Consider the 70 ppm/°C temperature coefficient for thermal stability requirements. Evaluate the 60 µA minimum current draw against system standby capabilities. Compare against higher accuracy grades if tighter tolerances are necessary for the application.

Part Context

This part belongs to the LM4040 family of micropower shunt voltage references known for high stability and low noise. The series offers multiple voltage options and accuracy grades to suit various precision applications. Maxim Integrated designs these components for robust performance in industrial and commercial environments.

Replacement Considerations

LM4040CEM3-3.0+T offers identical electrical specifications but utilizes an SOT-23-3 package instead of the SC-70-3 form factor.