LM4120AIM5-4.1

Voltage Reference Overview

The LM4120AIM5-4.1 is a precision micropower low dropout voltage reference manufactured by Texas Instruments. It provides a fixed output voltage of 4.1V with an initial accuracy of ±0.2%. The device operates within an input voltage range of 2V to 12V and supports a maximum shunt current of 5mA. It features a temperature coefficient of 50ppm/°C and functions reliably across a temperature range of -40°C to +85°C. Packaged in a compact SOT-23-5 surface-mount format, it draws a supply current of 275µA.

Voltage Reference Feature Summary

• Precision micropower series voltage reference design
• Low dropout operation for efficient power management
• High initial accuracy for stable reference performance
• Compact SOT-23-5 package for space-constrained applications

Voltage Reference Applications

• Portable battery-powered instrumentation
• Data acquisition systems requiring stable references
• Microcontroller analog-to-digital converter inputs
• Medical equipment power supplies

Voltage Reference Procurement Notes

Verify the specific suffix and tape-and-reel quantity against the manufacturer's latest datasheet before ordering. Confirm RoHS compliance status as manufacturing processes may change. Check for end-of-life notices or obsolescence warnings on distributor platforms. Ensure the selected packaging matches your automated assembly requirements. Validate that the operating temperature range meets your environmental specifications.

Voltage Reference Selection Notes

Select this component when a fixed 4.1V reference is required with high precision. Consider the 275µA quiescent current for battery life calculations. Ensure the input voltage remains above the minimum dropout threshold. Verify that the load current does not exceed the 5mA shunt limit. Compare thermal drift characteristics against application tolerance requirements.

Voltage Reference Part Context

The LM4120 belongs to Texas Instruments' family of precision micropower voltage references. This series is designed for applications demanding stability and low power consumption. The AIM5 variant indicates a specific accuracy grade and SOT-23-5 package configuration. It serves as a reliable reference source for analog circuits where noise and drift must be minimized.

Voltage Reference Replacement Considerations

Direct replacements include other LM4120 variants with different output voltages or accuracies. Verify pin compatibility and thermal performance when substituting. Check if alternative packages like SC-70 are acceptable for the design.