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LM199/LM399
LM199A/LM399A
1
199399fc
For more information www.linear.com/LM399
Typical applicaTion
FeaTures DescripTion
Precision Reference
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.
10V Buffered Reference Reverse Voltage Change
applicaTions
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear
Technology Corporation. All other trademarks are the property of their respective owners.
n
Precision Voltage Reference for Multimeters
n
Calibration Equipment Voltage Standards
n
Laboratory Measurement Equipment
n
Industrial Monitor/Control Instruments
n
High Accuracy Data Converters
n
6.95V Shunt Reference
n
Guaranteed 0.5ppm/°C Temperature Coefficient
n
Guaranteed 1Ω Maximum Dynamic Impedance
n
Guaranteed 20µV
RMS
Maximum Noise
n
Guaranteed Initial Tolerance of 2%
n
Wide Operating Current Range
n
Available in 4-Lead TO-46 Metal Can
9k
0.1%
7.5k
5%
3
+
–
1
4 2
6.95V
15V
LM399H
20k
0.1%
2
7
4
6
10V
3
LM199 TA01a
–
+
LT
®
1001
REVERSE CURRENT (mA)
0
REVERSE VOLTAGE CHANGE (mV)
3
4
5
6
10
LM199 TA01b
2
1
0
2 4 8
6
7
8
STABILIZED
(T
J
≈ 90°C)
T
J
= 25°C
