LM4040AECT-2.0

Overview

The LM4040AECT-2.0 is a micropower shunt voltage reference manufactured by STMicroelectronics, providing a fixed output voltage of 2.048V with an initial accuracy of ±0.2%. 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 supports a cathode current range from 12 µA to 15 mA and exhibits low noise characteristics, specifically 10µVp-p (0.1Hz to 10Hz) and 95µVrms (10Hz to 10kHz). It is housed in a compact SOT-323-5 surface-mount package.

Feature Summary

• Ultra-low operating current of 12 µA at 25°C enables efficient power management for battery-powered designs.
• High precision with ±0.2% initial accuracy ensures reliable reference performance across varying conditions.
• Inherent stability with capacitive loads eliminates the need for external compensation components.

Applications

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

Procurement Notes

Verify the specific suffix 'ECT' against the official datasheet to confirm the exact package type and tape-and-reel specifications. Ensure the selected variant matches the required 2.048V output and ±0.2% tolerance. Confirm RoHS compliance status and check for any automotive or extended grade requirements if operating in harsh environments.

Selection Notes

Select this component when space constraints require a small SOT-323-5 footprint alongside high precision. It is suitable for applications demanding low quiescent current and stable performance under capacitive loading. Consider alternative accuracy grades like LM4040B or LM4040C if tighter tolerances are not strictly necessary.

Part Context

The LM4040 series comprises micropower shunt voltage references available in multiple fixed output voltages including 2.048V, 2.5V, 3.0V, 4.096V, and 5.0V. The family offers various accuracy grades ranging from ±0.1% to ±1%, catering to diverse precision requirements while maintaining low power consumption and industrial temperature stability.

Replacement Considerations

LM4040BECT-2.0: Offers ±0.2% accuracy in the same package. LM4040AELT-2.5: Provides ±0.1% accuracy with a 2.5V output in SOT-23-3L. LM4040CELT-2.0: Features ±0.5% accuracy in SOT-23-3L.