LM4120IM5-3.0

Voltage Reference Overview

The LM4120IM5-3.0 is a precision micropower low dropout voltage reference manufactured by Texas Instruments, featuring a fixed output of 3.0V. It operates within an input voltage range of 2V to 12V and delivers a maximum shunt current of 5mA with a quiescent current of approximately 275µA. The device offers an initial accuracy of ±0.5% and a temperature coefficient of 50ppm/°C. Designed for surface-mount applications, it utilizes a five-pin SOT-23 package (SC-74A) and functions reliably across a temperature range of -40°C to +85°C.

Voltage Reference Feature Summary

• Provides stable reference voltage with low dropout characteristics suitable for battery-powered systems
• Delivers high precision with tight initial accuracy tolerances
• Maintains performance stability over wide temperature variations

Voltage Reference Applications

• Portable instrumentation requiring precise voltage references
• Battery-operated measurement devices
• Data acquisition systems needing stable analog references

Voltage Reference Procurement Notes

Verify the specific suffix and tape/reel configuration when ordering, as packaging options vary. Confirm availability status directly with authorized distributors, as supply levels fluctuate. Ensure the selected variant matches the required output voltage and accuracy grade for your specific circuit design requirements before finalizing procurement.

Voltage Reference Selection Notes

Select this component when a fixed 3.0V reference with ±0.5% accuracy is required in a compact SOT-23 footprint. It is appropriate for designs prioritizing low power consumption alongside moderate precision. Consider the 5mA load capability and ensure the input voltage remains within the specified operating range to maintain regulation.

Voltage Reference Part Context

This part belongs to the LM4120 series of precision micropower voltage references from Texas Instruments. The series includes various fixed output voltages and accuracy grades, all sharing similar low-power architecture and SOT-23 packaging. It serves as a cost-effective solution for general-purpose reference needs where ultra-low noise or higher precision is not critical.

Voltage Reference Replacement Considerations

Direct substitutes include other LM4120 variants with different output voltages or accuracy grades, such as LM4120AIM5-3.0 for tighter tolerance. Cross-brand alternatives like REF30xx series may offer different specifications but require verification of pin compatibility and electrical parameters.