LM4120IM5-4.1

Voltage Reference Overview

The LM4120IM5-4.1 is a precision micropower low dropout voltage reference manufactured by Texas Instruments. It provides a fixed nominal output voltage of 4.1 V with an initial accuracy of 0.5%. The device operates within a supply voltage range of 2 V to 12 V and draws a typical quiescent current of 275 µA. It features a temperature coefficient of 50 ppm/°C and supports a maximum shunt current of 5 mA. The component is housed in a compact SOT-23-5 surface-mount package, suitable for space-constrained designs.

Voltage Reference Feature Summary

• Precision micropower series voltage reference topology
• Low dropout operation capability
• Compact five-pin SOT-23 surface-mount packaging

Voltage Reference Applications

• Portable battery-powered instrumentation
• Data acquisition systems requiring stable reference voltages
• Microcontroller analog-to-digital converter references

Voltage Reference Procurement Notes

Verify the specific suffix and marking code against the official datasheet to confirm the 4.1 V output variant. Ensure the ordering part number matches the required accuracy grade and package type. Check for RoHS compliance status and lead-free specifications as indicated in the manufacturer's documentation before procurement.

Voltage Reference Selection Notes

Select this component when a fixed 4.1 V reference is required with moderate precision (0.5%) and low power consumption. It is suitable for applications where input voltage varies between 2 V and 12 V. Consider the 50 ppm/°C temperature drift for thermal stability requirements. The SOT-23-5 package is ideal for high-density PCB layouts.

Voltage Reference Part Context

The LM4120 belongs to Texas Instruments' family of precision micropower voltage references. This series offers various fixed output voltages and accuracy grades. The IM5 variant specifically denotes the industrial temperature range and SOT-23-5 package configuration, distinguishing it from automotive or higher-precision AI variants.

Voltage Reference Replacement Considerations

Check for direct pin-compatible substitutes such as other LM4120 variants with different output voltages or accuracy grades. Verify that alternative components meet the same 275 µA quiescent current and 5 mA load current specifications.