LM4040DECT-2.0

Overview

The LM4040DECT-2.0 is a micropower shunt voltage reference manufactured by STMicroelectronics, providing a fixed output of 2.048 V with an initial accuracy of ±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 supports a cathode current range from 10 µA to 15 mA and is housed in a compact SOT323-5L surface-mount package.

Feature Summary

• Provides stable reference voltage across the full industrial temperature range
• Designed for space-constrained applications using the SOT323-5L package
• Operates efficiently at ultra-low currents suitable for power-restricted designs

Applications

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

Procurement Notes

Verify that the ordering suffix 'ECT' corresponds to the SOT323-5L package and 'D' indicates the 1% precision grade as documented in the official datasheet. Confirm the '2.0' designation matches the required 2.048 V output level before finalizing procurement specifications.

Selection Notes

Select this component when a 1% tolerance reference is sufficient for the application requirements. Ensure the design accommodates the specified operating current limits between 10 µA and 15 mA. Consider the thermal resistance characteristics if high ambient temperatures are expected within the operational range.

Part Context

This part belongs to the LM4040 family of precision micropower shunt voltage references. The series offers various fixed output voltages and precision grades (A, B, C, D) to accommodate different accuracy needs while maintaining low power consumption and stability under varying load conditions.

Replacement Considerations

LM4040CECT-2.0 provides 0.5% precision; LM4040BECT-2.0 provides 0.2% precision; LM4040AECT-2.0 provides 0.1% precision.