LM4050AIX3-2.1

Voltage Reference Overview

The LM4050AIX3-2.1 is a precision two-terminal shunt-mode bandgap voltage reference manufactured by Analog Devices Inc./Maxim Integrated. It provides a fixed reverse breakdown voltage of 2.048V with an initial accuracy of 0.1% and a maximum temperature coefficient of 50ppm/°C guaranteed over the -40°C to +125°C operating range. The device operates within a wide current range of 60µA to 15mA, features low dynamic impedance, and delivers 28µVRMS output noise (10Hz to 10kHz). It is housed in an ultra-small 3-pin SC70 surface-mount package measuring 1.8mm x 1.8mm.

Voltage Reference Feature Summary

• Ultra-small 3-pin SC70 surface-mount package for space-critical applications
• Laser-trimmed resistors ensure excellent initial accuracy without external capacitors
• Stable reverse breakdown voltage across wide operating temperatures and currents
• Capable of tolerating capacitive loads directly

Voltage Reference Applications

• Portable, battery-powered equipment
• Notebook computers
• Cell phones
• Industrial process controls
• Automotive systems

Voltage Reference Procurement Notes

Verify the specific suffix against official manufacturer documentation to confirm exact tolerance grades and packaging options. Confirm lead-free status and RoHS compliance requirements. Ensure the selected variant matches the required thermal performance for the intended environment. Cross-reference ordering information for any automotive qualification designations if applicable.

Voltage Reference Selection Notes

Select this component when high precision and minimal board space are critical constraints. The 0.1% accuracy and 50ppm/°C stability make it suitable for sensitive analog circuits. Consider the 60µA minimum operating current for low-power designs. Verify that the load capacitance does not exceed stability limits despite the device's inherent tolerance.

Voltage Reference Part Context

This part belongs to the LM4050/LM4051 family of micropower shunt voltage references. The series offers multiple fixed reverse breakdown voltages including 1.225V, 2.500V, 3.000V, 3.3V, 4.096V, and 5.000V. The family is designed to replace larger SOT23 packages while maintaining similar electrical characteristics and performance metrics.

Voltage Reference Replacement Considerations

Direct substitutes include other LM4050 variants with different voltage outputs or accuracy grades. Check for equivalent parts from Texas Instruments such as the LM4040 series, noting differences in temperature coefficients and package types.