LM199/LM399
LM199A/LM399A
Precision Reference
DESCRIPTIO
U
STABILIZED
(T
J
≈
90°C)
T
J
=
25°C
8
6
REVERSE CURRENT (mA)
4
10
LM199 TA01b
FEATURES
■
■
■
■
■
■
■
6.95V Shunt Reference
Guaranteed 0.5ppm/°C Temperature Coefficient
Guaranteed 1Ω Maximum Dynamic Impedance
Guaranteed 20µV
RMS
Maximum Noise
Guaranteed Initial Tolerance of 2%
Wide Operating Current Range
Available in 4-Lead TO-46 Metal Can
APPLICATIO S
■
■
■
■
■
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.
Precision Voltage Reference for Multimeters
Calibration Equipment Voltage Standards
Laboratory Measurement Equipment
Industrial Monitor/Control Instruments
High Accuracy Data Converters
TYPICAL APPLICATIO
15V
10V Buffered Reference
9k
0.1%
8
REVERSE VOLTAGE CHANGE (mV)
7
6
5
4
3
2
1
0
0
7.5k
5%
LM399H
6.95V
3
20k
0.1%
–
4
2
LM199 TA01a
+
–
+
3
1
2
U
U
Reverse Voltage Change
7
6
10V
LT
®
1001
4
2
LM199399fb
1
LINER [ LINEAR TECHNOLOGY ]
