LM4041CIM-1.2

Voltage Reference Overview

The LM4041CIM-1.2 is a micropower shunt voltage reference manufactured by National Semiconductor, providing a fixed 1.225 V output. It features an initial accuracy of ±0.1% at 25 °C and a maximum temperature coefficient of 100 ppm/°C. The device operates with a minimum current of 60 µA and supports a maximum shunt current of 12 mA. It is housed in a SOT-23-3 surface-mount package and functions within an industrial temperature range of -40 °C to +85 °C.

Voltage Reference Feature Summary

• Provides stable 1.225 V reference voltage with high precision
• Operates with ultra-low micropower consumption suitable for battery applications
• Capable of tolerating capacitive loads without oscillation
• Bandgap curvature correction ensures low temperature drift

Voltage Reference Applications

• Space-critical portable electronic designs
• Battery-powered instrumentation systems
• Precision data acquisition circuits
• Reference sources for analog-to-digital converters

Voltage Reference Procurement Notes

Verify the manufacturer designation as National Semiconductor or its successor Texas Instruments. Confirm the specific suffix indicates the 1.225 V fixed version and SOT-23-3 package. Ensure the component meets the required industrial temperature grade (-40 °C to +85 °C) and accuracy class (±0.1%) for the intended application environment.

Voltage Reference Selection Notes

Select this component when a subminiature footprint is required alongside high precision. The LM4041CIM-1.2 is appropriate for designs where power conservation is critical due to its low operating current. Verify that the load conditions remain within the specified 12 mA maximum shunt current limit to maintain regulation stability.

Voltage Reference Part Context

This part belongs to the LM4040/LM4041 family of precision micropower shunt references. While the LM4040 offers higher current capacity up to 15 mA, the LM4041 is optimized for lower power applications with a 12 mA maximum limit. Both series utilize bandgap technology for temperature compensation and are designed for surface-mount integration.

Voltage Reference Replacement Considerations

LM4041CIM3X-1.2/NOPB: Pin-compatible alternative from Texas Instruments with identical electrical characteristics.