LM4041EIM3-1.2

Voltage Reference Overview

The LM4041EIM3-1.2 is a micropower shunt voltage reference from Texas Instruments providing a fixed 1.225 V output. It features an initial accuracy of ±0.5% and a maximum temperature coefficient of 100 ppm/°C. The device operates within a wide current range, with a typical quiescent current of 40 μA at 25 °C and a maximum cathode current of 12 mA. It is housed in a compact SOT-23-3 surface-mount package and supports an industrial operating temperature range from -40 °C to +85 °C.

Voltage Reference Feature Summary

• Provides stable 1.225 V reference voltage with high precision
• Operates with ultra-low power consumption suitable for battery applications
• Remains stable when driving capacitive loads without external compensation

Voltage Reference Applications

• Portable electronic devices requiring space-saving components
• Battery-powered systems prioritizing low standby current
• Precision measurement circuits needing stable reference voltages

Voltage Reference Procurement Notes

Verify the specific suffix EIM3 corresponds to the SOT-23-3 package and industrial temperature grade (-40°C to +85°C). Confirm that the '1.2' designation indicates the 1.225V fixed output variant. Ensure compatibility with your PCB footprint for the SC-59/SOT-23 form factor before ordering.

Voltage Reference Selection Notes

Select this component when a fixed 1.225V reference is required with ±0.5% initial accuracy. It is appropriate for designs where low quiescent current is critical. Choose this over adjustable versions if the fixed voltage meets system requirements directly. Consider the extended temperature grade (LM4041Q) if operation above 85°C is necessary.

Voltage Reference Part Context

This part belongs to the LM4041 family of micropower shunt voltage references. The family offers various accuracy grades (0.1%, 0.2%, 0.5%, 1%) and temperature ranges. The LM4041 series is designed for applications where small size and low power are essential, utilizing laser-trimmed Zener diodes for precise voltage setting.

Voltage Reference Replacement Considerations

Compatible substitutes include other LM4041 variants with matching accuracy and temperature ratings, such as LM4041CIM3-1.2/NOPB or LM4041DEM3-1.2/NOPB, provided they fit the same SOT-23-3 package and meet the specific circuit's current and stability requirements.