LM199 Просмотр технического описания (PDF) - Linear Technology
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LM199 Datasheet PDF : 8 Pages
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LM199/LM399
LM199A/LM399A
Precision Reference
FEATURES
■ 6.95V Shunt Reference
■ Guaranteed 0.5ppm/°C Temperature Coefficient
■ 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
U
APPLICATIO S
■ Precision Voltage Reference for Multimeters
■ Calibration Equipment Voltage Standards
■ Laboratory Measurement Equipment
■ Industrial Monitor/Control Instruments
■ High Accuracy Data Converters
DESCRIPTIO
The LM199/LM399 precision shunt reference features
excellent temperature stability over a wide range of volt-
age, 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 volt-
meters, precision calibration equipment, current sources
and a variety of other precision low cost references. A 10V
buffered reference application is shown below.
, LTC and LT are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
TYPICAL APPLICATIO
10V Buffered Reference
15V
7.5k
5%
9k
0.1%
+3
1
LM399H
6.95V
–4
2
2–
7
LT®1001
6
10V
3+
4
20k
0.1%
LM199 TA01a
Reverse Voltage Change
8
7
6
5
STABILIZED
(TJ ≈ 90°C)
4
TJ = 25°C
3
2
1
0
0
2
4
6
8
10
REVERSE CURRENT (mA)
LM199 TA01b
LM199399fb
1
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