LM4040AELT-4.1

Overview

The LM4040AELT-4.1 is a micropower shunt voltage reference manufactured by STMicroelectronics, providing a fixed output of 4.096 V with an initial accuracy of ±0.1%. It operates within an industrial temperature range of -40°C to +125°C and features a maximum temperature coefficient of 70 ppm/°C. The device draws an ultra-low operating current of 10 µA at 25°C and exhibits typical low-frequency noise of 10 µVp-p. Packaged in SOT-23-3L for surface mount applications, it remains stable when used with capacitive loads.

Feature Summary

• Ultra-low operating current of 10 µA at 25°C suitable for power-constrained designs
• High precision with ±0.1% initial accuracy at 25°C
• Stable operation with capacitive loads
• Low low-frequency noise

Applications

• Portable battery-powered equipment
• Data acquisition systems
• Instrumentation

Procurement Notes

Verify the specific suffix 'A' confirms the ±0.1% accuracy grade and '4.1' denotes the 4.096 V output. Confirm the package type matches the required SOT-23-3L footprint. Ensure the industrial temperature rating meets system requirements. Check RoHS compliance status if environmental regulations apply to the final assembly.

Selection Notes

Select this component when high precision and low power consumption are critical. The ±0.1% accuracy ensures minimal error in measurement circuits. The low operating current extends battery life in portable devices. Verify that the 4.096 V output aligns with the reference input requirements of downstream ADC or DAC components.

Part Context

This part belongs to the LM4040 family of micropower shunt voltage references. The family offers various accuracy grades (A, B, C, D) and fixed output voltages. The LM4040 series is designed for space-saving applications using compact packages like SOT-23-3L and SOT-323-5L, providing stability across wide temperature ranges.

Replacement Considerations

Compatible substitutes include other LM4040 variants with matching accuracy and voltage, such as LM4040AELT-2.5 for different reference levels. Cross-brand equivalents should be verified for pinout compatibility and thermal performance.