LM4040CECT-4.1

Overview

The LM4040CECT-4.1 is a micropower shunt voltage reference manufactured by STMicroelectronics, designed for applications requiring stable output voltages in space-constrained environments. 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 offers a fixed output voltage of 4.1 V with an initial accuracy of ±0.5%. It utilizes the SOT-23-3L surface-mount package and maintains an ultra-low operating current of 10 µA at 25°C, making it suitable for power-restricted designs.

Feature Summary

• Provides stable fixed output voltage across the industrial temperature range
• Ultra-low operating current suitable for power-restricted designs
• Stable operation when used with capacitive loads

Applications

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

Procurement Notes

Verify component authenticity through authorized STMicroelectronics distributors or certified partners. Confirm that the specific suffix matches the required 4.1V output and ±0.5% accuracy grade. Ensure packaging details align with project requirements for surface-mount assembly processes.

Selection Notes

Select this variant for designs prioritizing low quiescent current and compact footprint. The 4.1V output is less common than standard 2.5V or 5.0V options; verify compatibility with downstream circuitry. Consider the ±0.5% tolerance if higher precision grades like the 'A' version are not strictly necessary for the application budget.

Part Context

This component belongs to the LM4040 family of precision shunt voltage references. The family includes variants with different accuracy grades (0.1%, 0.2%, 0.5%, 1%) and output voltages (2.048V, 2.5V, 3.0V, 4.096V, 5.0V). The 'C' suffix denotes the ±0.5% accuracy class, while 'ECT' indicates the specific tape-and-reel packaging configuration.

Replacement Considerations

Direct substitutes include other manufacturers' LM4040 series parts such as Texas Instruments LM4040CIM3X-4.1/G4 or Analog Devices AD589 equivalents, provided pinout and electrical specifications match. Verify thermal performance and package dimensions before substitution.