LM399 PDF Datasheet
Please enter the part number you wish to PDF download in the search bar.
Description
This is Precision Reference. LM199, LM299, LM399, LM3999 Precision Reference
May 1999
LM199, LM299, LM399, LM3999 Precision Reference
General Description
The LM199 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 0.5Ω and allows the zener to operate over 0.5 mA to 10 mA current range with essentially no change in voltage or temperature coefficient. Further, a new subsurface zener structure gives low noise and excellent long term stability compared to ordinary monolithic zeners. The package is supplied with a thermal shield to minimize heater power and improve temperature regulation. The LM199 series references are exceptionally easy to use and free of the problems that are often experienced with ordinary zeners. There is virtually.