The LM4050 from National Semiconductor is a high precision micropower shunt voltage reference in a sub-miniature, surface-mount, three pin, SOT-23 package. The unit operates in the industrial temperature range of –40°C to +85°C. The design eliminates the need for an external stabilizing capacitor and is at the same time stable when operated into any capacitive load. The unit is available in several different, fixed reverse breakdown voltage from 2.500 V, 4.096 V, 5.000 V, 8.192 V to 10.000 V. The minimum operating current ranges from 60 µA for the LM4050-2.5 to 100 µA for the LM4050-10.0 this, along with its tiny outline, makes it ideal for use in battery-powered applications. The LM4050 is available in three different grades of the accuracy of 0.1%, 0.2%, and 0.5%, all have a low-temperature coefficient of less than 50 ppm/°C.
During the manufacturing process, the use of fuse and zener-zap reverse breakdown voltage trimming ensure that the premium (or A grade) components have an accuracy of better than ± 0,1% at 25°C. Stable reverse breakdown accuracy over a wide range of temperatures and operating currents is achieved by bandgap reference temperature drift curvature correction and a low dynamic impedance. Altogether this is a versatile component with an impressive specification. The full data sheet is available from the website: www.national.com