LM4040AELT-2.0

Overview

The LM4040AELT-2.0 is a micropower shunt voltage reference manufactured by STMicroelectronics, providing a fixed output of 2.048V 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, it supports a maximum cathode current of 15 mA and remains stable when used with capacitive loads.

Feature Summary

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

Applications

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

Procurement Notes

Verify the specific suffix '2.0' against official documentation, as standard LM4040A variants typically include 2.5V, 3.0V, 4.096V, and 5.0V options. Confirm package type SOT-23-3L and RoHS compliance status directly with the manufacturer or authorized distributors to ensure part authenticity and correct electrical specifications before procurement.

Selection Notes

Select this component for applications requiring high precision and minimal power consumption. The ±0.1% accuracy and 70 ppm/°C temperature coefficient make it suitable for sensitive measurement circuits. Ensure the design accommodates the 15 mA maximum cathode current and utilizes the compact SOT-23-3L footprint for space-constrained PCB layouts.

Part Context

The LM4040 series comprises micropower shunt voltage references available in multiple accuracy grades (±0.1%, ±0.2%, ±0.5%, ±1%) and output voltages. The LM4040A variant represents the highest precision tier. These devices are designed for industrial environments, offering stability across wide temperature ranges and compatibility with various packaging options including SOT-23-3L and SOT-323-5L.

Replacement Considerations

LM4040BECT-2.0