LM4040AECT-2.5

Overview

The LM4040AECT-2.5 is a precision micropower shunt voltage reference manufactured by STMicroelectronics, housed in an SOT-23-3L surface-mount package. It provides a fixed output voltage of 2.5 V with an initial accuracy of ±0.1%. The device features a maximum temperature coefficient of 70 ppm/°C and operates within an extended industrial temperature range from -40°C to +125°C. Designed for power-constrained applications, it exhibits an ultra-low operating current of 10 µA at 25°C and maintains stability when used with capacitive loads.

Feature Summary

• Ultra-low operating current of 10 µA at 25°C suitable for power-restricted designs
• High precision with ±0.1% initial accuracy at 25°C
• Very low low-frequency noise typical value of 10 µVp-p
• Stable operation when utilized with capacitive loads

Applications

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

Procurement Notes

Verify the specific suffix 'ECT' against official STMicroelectronics documentation to confirm exact tape-and-reel specifications and RoHS compliance status (Ecopack2). Ensure the component matches the SOT-23-3L package dimensions and pinout configuration required for the target PCB layout. Cross-reference the datasheet for absolute maximum ratings to prevent operational damage during integration.

Selection Notes

Select this component for applications requiring high precision in a compact surface-mount form factor. The ±0.1% accuracy and 70 ppm/°C temperature coefficient make it suitable for sensitive measurement circuits. Consider the 10 µA quiescent current for battery life optimization. Verify that the load conditions do not exceed the maximum shunt current limits specified in the electrical characteristics table.

Part Context

This part belongs to the LM4040 series of micropower shunt voltage references offered by STMicroelectronics. The series includes various output voltages and accuracy grades, such as the LM4040B, C, and D variants. The LM4040AECT-2.5 specifically denotes the 2.5 V output version with the highest precision grade available in this family, designed for industrial temperature ranges.

Replacement Considerations

Compatible substitutes include the LM4040AELT-2.5 and LM4040AIM3-2.5, which offer similar electrical characteristics and package options. Verify pin compatibility and thermal performance before substitution. Note that some alternatives may have different temperature coefficients or noise specifications.