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LM199 Folha de dados(PDF) 3 Page - Linear Technology

Nome de Peças LM199
Descrição Electrónicos  Precision Reference
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Fabricante Electrônico  LINER [Linear Technology]
Página de início  http://www.linear.com
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LM199/LM399
LM199A/LM399A
3
199399fc
For more information www.linear.com/LM399
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: The substrate is electrically connected to the negative terminal
of the temperature stabilizer. The voltage that can be applied to either
terminal of the reference is 40V more positive or 0.1V more negative than
the substrate.
Note 3: These specifications apply for 30V applied to the temperature
stabilizer and –55°C ≤ TA ≤ 125°C for the LM199; and 0°C ≤ TA ≤ 70°C for
the LM399.
Note 4: Devices with maximum guaranteed long-term stability of
20ppm/√kH are available. Drift decreases with time.
Note 5: This initial current can be reduced by adding an appropriate
resistor and capacitor to the heater circuit. See the Typical Performance
Characteristics graphs to determine values.
Note 6: Guaranteed by “Reverse Breakdown Change with Current.”
elecTrical characTerisTics
Typical perForMance characTerisTics
LM199/LM199A
LM399/LM399A
SYMBOL PARAMETER
CONDITIONS
MIN
TYP
MAX
MIN
TYP
MAX
UNITS
ΔVZ
ΔTime
Long-Term Stability
Stabilized, 22°C ≤ TA ≤ 28°C,
1000 Hours, IR = 1mA ±0.1%
8
(Note 4)
8
(Note 4) ppm/√kH
IH
Temperature Stabilizer Supply
Current
TA = 25°C, Still Air, VH = 30V
TA = –55°C (Note 5)
8.5
22
14
28
8.5
15
mA
VH
Temperature Stabilizer Supply
Voltage
l
9
40
9
40
V
Warm-Up Time to ±0.05% VZ
VH = 30V
3
3
Seconds
Initial Turn-On Current
9V ≤ VH ≤ 40V (Note 5)
140
200
140
200
mA
The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. (Note 3)
Reverse Characteristics
Dynamic Impedance
Stabilization Time
REVERSE VOLTAGE (V)
6.25
0.01
0.1
1
10
100
6.45
6.65
LM199 G01
6.85
7.05
TJ = 25°C
STABILIZED
(TJ ≈ 90°C)
FREQUENCY (Hz)
10
0.1
10
100
100
1k
10k
100k
LM199 G02
1
TJ = 25°C
STABILIZED
(TJ ≈ 90°C)
HEATER ON TIME (SECONDS)
0
–1
0
1
16
LM199 G03
–2
–3
–4
4
8
12
20
TA = 25°C
VH = 15V
TA = –55°C


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