LM4050CEM3-2.5

Voltage Reference Overview

The LM4050CEM3-2.5 is a precision micropower shunt voltage reference manufactured by Texas Instruments, formerly National Semiconductor. It provides a fixed output voltage of 2.5 V with an initial accuracy of 0.5% and a temperature coefficient of 50 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. It is housed in a compact SOT-23-3 surface-mount package.

Voltage Reference Feature Summary

• Provides stable reference voltage via two-terminal shunt operation without requiring external stabilizing capacitors.
• Maintains high precision across extended industrial temperature ranges with low dynamic impedance.
• Designed for space-constrained applications utilizing a subminiature three-pin surface-mount footprint.

Voltage Reference Applications

• Portable battery-powered instrumentation
• Data acquisition systems
• Handheld meters

Voltage Reference Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm the specific suffix indicates the correct voltage grade and package variant. Review official discontinuation notices as this part may be obsolete. Ensure compatibility with existing PCB footprints and thermal management requirements before procurement.

Voltage Reference Selection Notes

Select this component when a fixed 2.5 V reference is required in a small form factor. Consider the 0.5% initial accuracy and 50 ppm/°C temperature stability against circuit tolerance needs. Evaluate the 60 µA minimum operating current to ensure proper biasing in low-power designs. Verify that the SOT-23-3 package fits the available board space constraints.

Voltage Reference Part Context

This device belongs to the LM4050 family of precision micropower shunt voltage references. The family offers multiple fixed breakdown voltages including 1.225V, 2.048V, 3.000V, 3.3V, 4.096V, and 5.000V. Variants are available in both SC-70 and SOT-23 packages with accuracy grades ranging from 0.1% to 0.5%.

Voltage Reference Replacement Considerations

LM4050BEM3-2.5/NOPB

Voltage Reference FAQ

Does the LM4050CEM3-2.5 require an external capacitor for stability?

No, the device does not require an external stabilizing capacitor and ensures stability with any capacitive loads.

What is the operating current range for this reference?

The shunt current capability ranges from a minimum of 60 µA to a maximum of 15 mA.