LM4040AELT-2.5

Overview

The LM4040AELT-2.5 is a precision micropower shunt voltage reference manufactured by STMicroelectronics, providing a fixed output voltage of 2.5 V with an initial accuracy of ±0.1%. It operates within an industrial temperature range from -40 °C to +125 °C and features a maximum temperature coefficient of 70 ppm/°C. The device requires a minimum operating current of 10 µA at 25 °C and supports a reverse breakdown current up to 20 mA. It is housed in a compact SOT23-3L surface-mount package.

Feature Summary

• Ultra-low operating current consumption suitable for power-restricted designs
• High precision with ±0.1% initial accuracy at 25 °C
• Stable operation when used with capacitive loads
• Very low low-frequency noise performance

Applications

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

Procurement Notes

Verify the specific ordering code against the manufacturer's official documentation to ensure correct voltage, tolerance, and package selection. Confirm that the component meets required environmental standards such as RoHS compliance before finalizing procurement. Cross-reference datasheet revision history for any updates to electrical characteristics or thermal data prior to integration.

Selection Notes

Select this component for applications requiring high stability and minimal power consumption in space-constrained environments. Ensure the design accommodates the specified operating current range and thermal resistance limits. Verify compatibility with system load conditions, particularly regarding capacitive loading stability, to maintain regulation integrity across the full industrial temperature range.

Part Context

This part belongs to the LM4040 family of precision micropower shunt voltage references. The series offers various fixed output voltages including 2.048 V, 3.0 V, 4.096 V, and 5.0 V, alongside different accuracy grades. The LM4040AELT-2.5 specifically denotes the 0.1% accuracy variant in the SOT23-3L package, designed for high-precision analog circuitry.

Replacement Considerations

LM4040BELT-2.5 (0.2% accuracy)

FAQ

What is the maximum operating current for the LM4040AELT-2.5?

The maximum operating current (Ikmax) is 15 mA.

Is the LM4040AELT-2.5 stable with capacitive loads?

Yes, the device is designed to be stable when used with capacitive loads.