LM4040CECT-5.0

Overview

The LM4040CECT-5.0 is a micropower shunt voltage reference manufactured by STMicroelectronics, providing a fixed 5.0 V output. It features an initial accuracy of ±0.5% and operates with 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. It supports a maximum shunt current of 15 mA and functions within an industrial temperature range of -40°C to +125°C. The component is housed in a compact SOT-323-5 surface-mount package.

Feature Summary

• Ultra-low power consumption with 10 µA operating current suitable for battery-powered designs
• High precision with ±0.5% initial accuracy and stable performance under capacitive loads
• Compact SOT-323-5 surface-mount package designed for space-constrained applications

Applications

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

Procurement Notes

Verify the specific suffix 'ECT' against the official STMicroelectronics datasheet to confirm the tape-and-reel packaging configuration and ensure the part status remains active. Confirm that the 5.0 V output variant aligns with the required system voltage references. Check for any RoHS compliance markings on the documentation to ensure regulatory adherence for the target market.

Selection Notes

Select this component when a stable 5.0 V reference is needed with moderate precision requirements. The ±0.5% accuracy class offers a balance between cost and performance for general-purpose applications. Ensure the design accommodates the 15 mA maximum shunt current capability and utilizes the specified SOT-323-5 footprint for optimal board space utilization.

Part Context

This part belongs to the LM4040 family of micropower shunt voltage references from STMicroelectronics. The family provides multiple fixed output voltages including 2.048 V, 2.5 V, 3.0 V, 4.096 V, and 5.0 V. Variants are distinguished by accuracy grades (A, B, C, D) and package types, offering flexibility for various industrial and consumer electronics applications requiring precise voltage regulation.

Replacement Considerations

Compatible substitutes include the LM4040BIM3-5.0 and LM4040DIM3-5.0 from Microchip, which share similar shunt reference topologies and output voltages. Verify pinout compatibility and thermal characteristics before substitution.