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LM399 - Precision Reference

The LM199/LM399 precision shunt reference features excellent temperature stability over a wide range of voltage, temperature and operating current conditions. A stabilizing heater is incorporated with the active Zener on a monolithic substrate which nearly eliminates changes in voltage with temperature. The subsurface Zener operates over a current range of 0.5mA to 10mA, and offers minimal noise and excellent long-term stability.

Ideal applications for the LM199/LM399 include digital voltmeters, precision calibration equipment, current sources and a variety of other precision low cost references. A 10V buffered reference application is shown below.

Features 6.95V Shunt Reference Guaranteed 0.5ppm/°C Temperature Coeffi cient Guaranteed 1Ω Maximum Dynamic Impedance Guaranteed 20µVRMS Maximum Noise Guaranteed Initial Tolerance of 2% Wide Operating Current Range Available in 4-Lead TO-46 Metal Can Typical Application

Applications Precision voltage reference for multimeters Calibration equipment voltage standards Laboratory measurement equipment Industrial monitor/control instruments High accuracy data converters Packaging