LM4040CELT-2.5

Overview

The LM4040CELT-2.5 is a micropower shunt voltage reference manufactured by STMicroelectronics, providing a fixed output 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 requires a minimum operating current of 10 µA at 25°C and supports up to 15 mA cathode current. It exhibits very low low-frequency noise, typically 10 µVp-p, and maintains stability when driving capacitive loads. The component is housed in a surface-mount SOT23-3L package.

Feature Summary

• Provides stable 2.5 V reference voltage with ±0.5% precision
• Ultra-low operating current suitable for power-restricted designs
• Low low-frequency noise characteristics
• Capable of driving capacitive loads without instability

Applications

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

Procurement Notes

Verify the specific ordering suffix 'ELT' corresponds to the SOT23-3L tape-and-reel packaging configuration as defined in the manufacturer's ordering guide. Confirm that the 'C' designation aligns with the required ±0.5% initial accuracy tolerance for the application. Ensure the procurement channel sources genuine components from authorized distributors to guarantee compliance with the specified electrical limits and environmental standards.

Selection Notes

Select this component when a compact surface-mount solution is required for space-constrained designs. The SOT23-3L package offers significant size reduction compared to larger alternatives. Choose this part if the design demands low quiescent current consumption alongside high precision. Verify that the load conditions remain within the specified operating current range to ensure regulation stability across the full industrial temperature spectrum.

Part Context

This device belongs to the LM4040 family of precision micropower shunt voltage references. The family includes variants with different accuracy grades (A, B, C, D) and output voltages (2.048 V, 2.5 V, 3.0 V, 4.096 V, 5.0 V). The LM4040 series is designed for applications requiring stable reference voltages over wide temperature ranges, utilizing either SOT23-3L or SOT323-5L packages to accommodate various board space requirements.

Replacement Considerations

LM4040BELT-2.5

FAQ

Is the LM4040CELT-2.5 stable with capacitive loads?

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

What is the maximum temperature coefficient for this part?

The maximum average temperature coefficient is 70 ppm/°C over the operating current range.