LM4050CIM3X-5.0

Voltage Reference Overview

The LM4050CIM3X-5.0 is a precision micropower shunt voltage reference manufactured by Texas Instruments, which acquired National Semiconductor. It provides a fixed output voltage of 5.0 V with an initial accuracy of 0.5%. The device features a maximum temperature coefficient of 50 ppm/°C and supports a shunt current range from 60 µA to 15 mA. It operates within a temperature range of -40°C to +125°C and utilizes a SOT-23-3 surface-mount package.

Voltage Reference Feature Summary

• Provides stable reverse breakdown voltage without requiring external stabilizing capacitors.
• Maintains accuracy across wide operating currents and temperatures due to low dynamic impedance.
• Utilizes laser-trimmed resistors for high initial precision in a compact footprint.

Voltage Reference Applications

• Space-critical electronic designs requiring small form factors
• Portable battery-powered instrumentation systems
• Precision analog-to-digital converter (ADC) reference sources

Voltage Reference Procurement Notes

Verify the manufacturer designation carefully, as National Semiconductor was acquired by Texas Instruments. Confirm that the specific suffix corresponds to the 0.5% accuracy grade and 5V output variant. Ensure compatibility with the SOT-23-3 footprint during procurement planning.

Voltage Reference Selection Notes

Select this component when a fixed 5V reference is required with 0.5% tolerance. It is suitable for applications needing stability over a -40°C to +125°C range. Consider the 60µA minimum current requirement for biasing circuits. Verify package availability if transitioning from older National Semiconductor stock.

Voltage Reference Part Context

This part belongs to the LM4050-N family of precision shunt references. It shares architectural similarities with other variants offering different voltages and accuracy grades. The device is designed for high-performance applications where size and power consumption are critical constraints.

Voltage Reference Replacement Considerations

LM4050AIM3X-5.0/NOPB offers higher 0.1% accuracy. LM4050BIM3X-5.0 provides 0.2% accuracy. LM4050CEM3X-5.0/NOPB is a direct functional equivalent with identical specifications.

Voltage Reference FAQ

Does the LM4050CIM3X-5.0 require an external capacitor for stability?

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

What is the minimum operating current for this reference?

The device guarantees operation with a shunt current as low as 60 µA.