LM4040DECT-5.0

Overview

The LM4040DECT-5.0 is a micropower shunt voltage reference manufactured by STMicroelectronics, providing a fixed 5.0 V output with ±1% initial accuracy at 25 °C. 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 draws a typical operating current of 10 µA and exhibits low low-frequency noise of 10 µVp-p. It is stable when driving capacitive loads and is available in the SOT-323-5L surface-mount package.

Feature Summary

• Provides high precision with ±1% initial accuracy for stable reference performance
• Features ultra-low operating current suitable for power-constrained designs
• Maintains stability when used with capacitive loads
• Operates reliably across the extended industrial temperature range

Applications

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

Procurement Notes

Verify the specific suffix 'ECT' against official STMicroelectronics documentation to confirm the exact package type (SOT-323-5L) and tape-and-reel configuration. Ensure the part status is active, as some LM4040 variants may be marked as Not Recommended for New Designs. Cross-reference the manufacturer's datasheet to validate the 70 ppm/°C temperature coefficient specification for this specific accuracy grade.

Selection Notes

Select this component for applications requiring a precise 5 V reference with minimal quiescent current consumption. The ±1% tolerance suits general-purpose circuits where tighter tolerances are unnecessary. Consider the SOT-323-5L package for space-sensitive PCB layouts. Verify that the load capacitance requirements are met to ensure stability during operation.

Part Context

This device belongs to the LM4040 family of micropower shunt voltage references from STMicroelectronics. The family offers multiple fixed output voltages and accuracy grades, including A (0.1%), B (0.2%), C (0.5%), and D (1%). The LM4040 series is designed for industrial applications requiring stable voltage references in compact packages.

FAQ

Is the LM4040DECT-5.0 stable with capacitive loads?

Yes, the LM4040 series is designed to remain stable when used with capacitive loads.

What is the operating temperature range for this device?

The device supports an industrial temperature range from -40 °C to +125 °C.