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The LM4040DEM3-4.1+T is a precision micropower shunt voltage reference manufactured by Analog Devices Inc./Maxim Integrated. It provides a fixed reverse-breakdown output voltage of 4.096V with an initial accuracy of 1.0%. The device features a maximum temperature coefficient of 150ppm/°C and operates within a temperature range of -40°C to +125°C. It utilizes a 3-pin SOT23 surface-mount package and supports a shunt current range from 60µA to 15mA.
Verify the specific suffix '+T' indicates tape and reel packaging and '+' denotes lead-free/RoHS compliance. Confirm the 'DEM3' designation aligns with the required 1.0% accuracy grade and extended temperature range (-40°C to +125°C). Ensure the 3-pin SOT23 package matches the PCB footprint requirements.
Select this component when a 4.096V reference with 1.0% tolerance is sufficient for the application. Consider higher accuracy grades (A or B) if tighter voltage stability is required. Verify that the circuit design accommodates the minimum operating current of 60µA and does not exceed the maximum shunt current of 15mA during operation.
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, 2.500V, 3.000V, 3.3V, 4.096V, and 5.000V. Variants are available in both SC70 and SOT23 packages with different accuracy grades ranging from 0.1% to 1%.
LM4040BEM3-4.1+T offers 0.2% accuracy; LM4040AIM3-4.1+T offers 0.1% accuracy. Both maintain the same voltage and package but differ in initial accuracy specifications.