LM4040BELT-2.5

Overview

The LM4040BELT-2.5 is a micropower shunt voltage reference manufactured by STMicroelectronics, providing a fixed output of 2.5 V. It features an initial accuracy of ±0.2% and operates within an industrial temperature range of -40°C to +125°C. The device exhibits a maximum temperature coefficient of 70 ppm/°C and ultra-low operating current of 10 µA at 25°C. Packaged in SOT-23-3L for surface mount applications, it supports a cathode current up to 15 mA with low LF noise characteristics.

Feature Summary

• Ultra-low power consumption suitable for battery-operated designs
• High precision with stable performance across wide temperature ranges
• Capable of driving capacitive loads without instability

Applications

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

Procurement Notes

Verify the specific suffix BELT corresponds to the required package and tape-and-reel configuration. Confirm that the ±0.2% accuracy grade meets system requirements. Ensure compatibility with existing PCB footprints for the SOT-23-3L package. Check RoHS compliance status for environmental regulations.

Selection Notes

Select this component when space constraints require a compact SOT-23-3L footprint alongside precise voltage referencing. The 10 µA quiescent current makes it ideal for power-sensitive portable devices. Choose over higher accuracy grades if cost optimization is necessary while maintaining stability under capacitive loading conditions.

Part Context

This part belongs to the LM4040 family of micropower shunt references. The series offers various fixed voltages including 2.048V, 3.0V, 4.096V, and 5.0V. Different letter codes denote accuracy grades, with 'B' indicating ±0.2% tolerance. The family is designed for industrial applications requiring high stability and low noise.

Replacement Considerations

LM4040AELT-2.5 (±0.1% accuracy), LM4040CELT-2.5 (±0.5% accuracy). TS4040EYLT-2.5 (STMicroelectronics alternative).