The model number is a specific version of a generic that can be purchased or sampled. Status Status indicates the current lifecycle of the product. This can be one of 4 stages: Pre-Release: The model has not been released to general production, but samples may be available. Production: The model is currently being produced, and generally available for purchase and sampling. Last Time Buy: The model has been scheduled for obsolescence, but may still be purchased for a limited time. Obsolete: The specific part is obsolete and no longer available.
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The LM series are precision, temperature-stabilized monolithic zeners offering temperature coefficients a factor of ten better than high quality reference zeners. Constructed on a single monolithic chip is a temperature stabilizer circuit and an active reference zener. The active circuitry reduces the dynamic impedance of the zener to about 0. Further, a new subsurface zener structure gives low noise and excellent long term stability compared to ordi- nary monolithic zeners.
The package is supplied with a ther- mal shield to minimize heater power and improve tempera- ture regulation. The LM series references are exceptionally easy to use and free of the problems that are often experienced with or- dinary zeners. There is virtually no hysteresis in reference voltage with temperature cycling. Also, the LM is free of voltage shifts due to stress on the leads. Finally, since the unit is temperature stabilized, warm up time is fast.
The LM can be used in almost any application in place of ordinary zeners with improved performance. Some ideal ap- plications are analog to digital converters, calibration stan- dards, precision voltage or current sources or precision power supplies.
Further in many cases the LM can re- place references in existing equipment with a minimum of wiring changes. The LM series devices are packaged in a standard her- metic TO package inside a thermal shield.
LM399H Linear Technology, LM399H Datasheet
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