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The LM4040CEX3-2.5+T is a precision micropower shunt voltage reference manufactured by Analog Devices Inc./Maxim Integrated. It provides a fixed reverse-breakdown output voltage of 2.500V with an initial accuracy of 0.5%. The device features a maximum temperature coefficient of 100ppm/°C and operates within a temperature range of -40°C to +125°C. It utilizes a subminiature 3-pin SC70 surface-mount package, measuring 1.8mm x 1.8mm. The component supports a shunt current capability ranging from 60μA to 15mA.
Verify the specific ordering suffixes against official manufacturer documentation to confirm compliance requirements and packaging specifications. Ensure that the selected variant matches the required operating temperature range and accuracy grade for the intended application environment before finalizing procurement decisions.
Select this component when a compact footprint is required alongside stable voltage referencing in portable or automotive environments. Consider the 0.5% initial accuracy and 100ppm/°C temperature coefficient for applications demanding moderate precision. Verify that the available shunt current range meets the minimum operating requirements of the connected circuitry.
This part belongs to the LM4040 family of improved precision micropower shunt voltage references. The series offers multiple fixed reverse-breakdown voltages including 2.048V, 3.000V, 3.3V, 4.096V, and 5.000V. Variants are available in both SOT23 and SC70 packages with different accuracy grades ranging from 0.1% to 1.0%.
Direct replacements include other LM4040 variants with matching voltage and package types, such as LM4040CEM3-2.5+T (SOT23) or LM4040BEX3-2.5+T (SC70). Cross-manufacturer equivalents may exist but require verification of pinout compatibility and electrical characteristics.