LM4041EIM3X-1.2

Voltage Reference Overview

The LM4041EIM3X-1.2 is a precision micropower shunt voltage reference manufactured by National Semiconductor, now Texas Instruments. It provides a fixed output voltage of 1.225 V with an initial accuracy of ±0.5%. The device operates within a temperature range of -40°C to +85°C and features a low operating current of 65 µA. Packaged in a compact SOT-23-3 surface-mount case, it supports a maximum cathode current of 12 mA. This component serves as a stable reference for analog circuits requiring high precision and low power consumption.

Voltage Reference Feature Summary

• Provides a precise 1.225 V fixed output voltage with ±0.5% initial accuracy
• Operates with micropower consumption at 65 µA typical current
• Designed for surface-mount applications in a compact SOT-23-3 package

Voltage Reference Applications

• Portable battery-powered instrumentation systems
• Handheld meters and measurement devices
• Data acquisition systems requiring stable voltage references

Voltage Reference Procurement Notes

Verify the manufacturer designation carefully, as National Semiconductor assets were acquired by Texas Instruments. Ensure the part number suffix matches the required temperature grade (E for -40°C to +85°C) and packaging format. Confirm RoHS compliance status through official documentation, as legacy stock may vary in environmental certification compared to current NOPB versions.

Voltage Reference Selection Notes

Select this component when a sub-1.3V reference is required for space-constrained designs. The SOT-23-3 package offers a small footprint suitable for dense PCB layouts. Consider the 12 mA maximum current limit for load regulation requirements. Verify that the 1.225V output aligns with the specific ADC or comparator input ranges of the target application circuit.

Voltage Reference Part Context

This part belongs to the LM4041 family of micropower shunt voltage references. It shares functional similarities with the LM4040 adjustable series but is configured for a fixed output. The 'E' suffix denotes the industrial temperature range variant. Related parts include the LM4041CIM3X-1.2/NOPB which offers extended temperature capabilities up to 125°C.

Voltage Reference Replacement Considerations

The LM4041CIM3X-1.2/NOPB is a confirmed substitute offering extended temperature operation. The LM4041DEM3X-1.2/NOPB provides similar electrical characteristics in the same package. Verify pinout compatibility and thermal performance when substituting across different temperature grades.