LM4050AIM3-3.0

Voltage Reference Overview

The LM4050AIM3-3.0 is a precision micropower shunt voltage reference manufactured by Analog Devices Inc./Maxim Integrated. It provides a fixed reverse breakdown output voltage of 3.0V with an initial accuracy of 0.1%. The device features a maximum temperature coefficient of 50ppm/°C and operates over a wide temperature range from -40°C to +125°C. It supports a shunt current range up to 15mA and utilizes a SOT-23 surface-mount package.

Voltage Reference Feature Summary

• Ultra-small 3-pin SC70 or SOT-23 surface-mount packages for space-critical applications
• Laser-trimmed resistors ensure excellent initial accuracy without requiring external stabilizing capacitors
• Low dynamic impedance ensures stable reverse breakdown voltage accuracy across wide operating currents
• Capable of driving any capacitive load while maintaining stability

Voltage Reference Applications

• Portable instrumentation systems requiring precise voltage references
• Battery-powered equipment where low power consumption is critical
• Data acquisition systems needing stable analog-to-digital converter references
• Temperature measurement circuits utilizing thermocouples or RTDs

Voltage Reference Procurement Notes

Verify the specific suffix configuration against official datasheets, as ordering suffixes may indicate variations in packaging or tape-and-reel specifications rather than functional changes. Confirm manufacturer attribution between Analog Devices and Maxim Integrated due to corporate integration history. Ensure compatibility with existing PCB footprints for SOT-23 or SC-70 packages during procurement planning.

Voltage Reference Selection Notes

Select this component when high initial accuracy of 0.1% is required alongside minimal physical footprint. The 50ppm/°C temperature coefficient makes it suitable for environments with significant thermal fluctuations. Consider the 60µA minimum operating current for battery life optimization in low-power designs. Verify that the 15mA maximum shunt current meets the circuit's load requirements.

Voltage Reference Part Context

The LM4050 series belongs to a family of two-terminal shunt-mode bandgap voltage references. These devices are designed as drop-in replacements for larger packages like SOT-23, offering 50% smaller dimensions in SC-70 form factors. The series includes multiple fixed voltage options such as 1.225V, 2.048V, 2.500V, 3.000V, 3.3V, 4.096V, and 5.000V to support various system architectures.

Voltage Reference Replacement Considerations

Publicly confirmed substitute part numbers include LM4050BEM3-3.0+T and LM4050CEX3-3.0+T. These alternatives offer similar functionality but differ in initial accuracy grades (0.2% and 0.5% respectively) while maintaining the same 3.0V output and package types.