LM4040CECT-2.5

Overview

The LM4040CECT-2.5 is a precision micropower shunt voltage reference manufactured by STMicroelectronics, offering a fixed output voltage of 2.5 V with an initial accuracy of ±0.5%. 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 provides ultra-low operating current of 10 µA at 25 °C and exhibits very low low-frequency noise, typically 10 µVp-p. Packaged in SOT323-5L, it maintains stability when used with capacitive loads.

Feature Summary

• Provides stable fixed output voltage across the industrial temperature range
• Ultra-low operating current suitable for power-restricted designs
• Maintains stability when connected to capacitive loads

Applications

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

Procurement Notes

Verify that the ordering suffix ECT corresponds to the SOT323-5L package and C indicates the 0.5% precision grade. Confirm the final digit matches the required 2.5 V output specification. Ensure compliance with RoHS standards as defined by the ECOPACK packaging grade. Cross-reference the manufacturer part number against official distribution channels to validate authenticity before procurement.

Selection Notes

Select this component for applications requiring high precision in space-constrained environments due to its compact SOT323-5L footprint. The low operating current makes it ideal for battery-powered devices where energy efficiency is critical. Verify that the 0.5% accuracy meets system requirements and that the 70 ppm/°C temperature coefficient is sufficient for the intended thermal environment.

Part Context

This device belongs to the LM4040 series of precision micropower shunt voltage references from STMicroelectronics. The series offers multiple fixed voltage options and precision grades to accommodate various design needs. The LM4040CECT-2.5 specifically targets applications needing reliable voltage referencing in portable and industrial instrumentation contexts.

Replacement Considerations

LM4040BECT-2.5 (±0.2% precision)

FAQ

Is the LM4040CECT-2.5 stable with capacitive loads?

Yes, the datasheet explicitly states that the device is stable when used with capacitive loads.

What is the minimum operating current for this device?

The minimum operating current is specified as 10 µA at 25 °C.