LM4050AEM3X-2.5

Voltage Reference Overview

The LM4050AEM3X-2.5 is a micropower shunt voltage reference manufactured by Texas Instruments, operating within the LM4050 series. It provides a fixed output voltage of 2.5 V with an initial accuracy of ±0.1% and a temperature coefficient of 50 ppm/°C. The device supports a maximum shunt current of 15 mA and functions reliably across an extended temperature range from -40°C to +125°C. Packaged in a compact SOT-23-3 surface-mount format, it draws a typical cathode current of 65 µA.

Voltage Reference Feature Summary

• Delivers high precision with ±0.1% initial accuracy for stable reference performance
• Operates at micropower levels with low cathode current consumption
• Maintains stability across wide industrial temperature ranges

Voltage Reference Applications

• Portable battery-powered instrumentation requiring low quiescent current
• Data acquisition systems needing precise analog-to-digital conversion references
• Temperature sensing circuits utilizing thermocouples or RTDs
• Handheld meters and multimeters

Voltage Reference Procurement Notes

Verify component authenticity through authorized distributors due to potential counterfeit risks. Confirm RoHS compliance status matches specific manufacturing lot requirements. Ensure storage conditions adhere to moisture sensitivity level guidelines to prevent package damage during soldering processes.

Voltage Reference Selection Notes

Select this variant when ±0.1% accuracy is required compared to standard 0.5% options. Verify that the 2.5 V output aligns with system reference needs. Consider the SOT-23-3 footprint constraints against available PCB space. Evaluate thermal management requirements given the 15 mA maximum shunt current capability.

Voltage Reference Part Context

This component belongs to the LM4050-N family of precision micropower shunt voltage references. It serves as a drop-in replacement for older National Semiconductor versions like the LM4040. The 'A' suffix denotes tighter tolerance specifications, while 'EM3' indicates the SOT-23-3 package type.

Voltage Reference Replacement Considerations

LM4050CEM3-2.5 offers similar functionality with 0.5% accuracy. LM4050BEM3-2.5/NOPB provides comparable performance in the same package. LM4050QCEM3X-2.5/NOPB adds automotive qualification under AEC-Q100 standards.