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
LM399 Typical Application
LM399 Typical Application
Applications
  • Precision voltage reference for multimeters
  • Calibration equipment voltage standards
  • Laboratory measurement equipment
  • Industrial monitor/control instruments
  • High accuracy data converters
Packaging
LM399 Package Drawing
Order Information
Part NumberPackageTempPrice(1-99)Price (1k)*
LM399AH#PBFTO-46C$9.37$6.56
LM399H#PBFTO-46C$6.64$4.65
Datasheet
Spec Notice
Reliability Data
LT Journal
CAD Symbol
Related Products
LM199/LM399 - Precision Reference
LM199/LM399 - SPECIFICATION NOTICE
R023 Reliability Data
March 2009 - How to Choose a Voltage Reference
LM399 Footprints and Symbols