LM4040BECT-5.0

Overview

The LM4040BECT-5.0 is a micropower shunt voltage reference manufactured by STMicroelectronics, providing a fixed output of 5.0 V with an initial accuracy of ±0.2%. 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 exhibits ultra-low operating current of 10 µA at 25°C and low LF noise of 10 µVp-p. It is housed in a compact SOT-323-5 package and supports a maximum cathode current of 15 mA.

Feature Summary

• Ultra-low power consumption suitable for battery-operated designs
• High precision with stable performance under capacitive loads
• Compact surface-mount packaging for space-constrained applications

Applications

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

Procurement Notes

Verify the specific suffix 'ECT' against the official datasheet to confirm the exact tape-and-reel quantity and package variant. Ensure the selected version matches the required ±0.2% tolerance class. Confirm RoHS compliance status for the specific manufacturing batch prior to integration into production lines.

Selection Notes

Select this component when a precise 5.0 V reference is needed with minimal quiescent current draw. The ±0.2% accuracy offers a balance between cost and precision compared to tighter tolerance variants. The SOT-323-5 package is ideal where board real estate is limited but through-hole options are unavailable.

Part Context

This part belongs to the LM4040 family of two-terminal shunt references. The series includes various fixed voltages and accuracy grades (A, B, C, D). The 'B' designation indicates the ±0.2% initial accuracy tier, while the 'ECT' suffix typically denotes specific packaging and reel specifications defined by the manufacturer.

Replacement Considerations

Cross-reference with other manufacturers offering equivalent 5.0 V shunt references in SOT-323-5 packages. Verify that substitute parts maintain similar temperature coefficients and operating current levels to ensure circuit stability without redesign.