Linear LM199 LM399 LM199A LM399A Data Sheet User Manual

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LM199/LM399 LM199A/LM399A Precision Reference

FEATURES DESCRIPTIO

■ 6.95V Shunt Reference The LM199/LM399 precision shunt reference features ■ Guaranteed 0.5ppm/°C Temperature Coeffi cient excellent temperature stability over a wide range of volt- ■ Guaranteed 1Ω Maximum Dynamic Impedance age, temperature and operating current conditions. A ■ Guaranteed 20µVRMS Maximum Noise stabilizing heater is incorporated with the active Zener on ■ Guaranteed Initial Tolerance of 2% a monolithic substrate which nearly eliminates changes in ■ Wide Operating Current Range voltage with temperature. The subsurface Zener operates ■ Available in 4-Lead TO-46 Metal Can over a current range of 0.5m A to 10m A, and offers minimal

noise and excellent long-term stability.

APPLICATIO S

Ideal applications for the LM199/LM399 include digital volt- ■ Precision Voltage Reference for Multimeters meters, precision calibration equipment, current sources ■ Calibration Equipment Voltage Standards and a variety of other precision low cost references. A 10V ■ Laboratory Measurement Equipment buffered reference application is shown below.

■ Industrial Monitor/Control Instruments

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All other trademarks are the property of their respective owners.

■ High Accuracy Data Converters

TYPICAL APPLICATIO

10V Buffered Reference Reverse Voltage Change

LM399H STABILIZED

LT®1001 10V (TJ ≈ 90°C)

TJ = 25°C

LM199 TA01a

REVERSE CURRENT (m A)

LM199 TA01b

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