LM199 데이터 시트보기 (PDF) - Linear Technology
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LM199 Datasheet PDF : 8 Pages
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LM199/LM399
LM199A/LM399A
ELECTRICAL CHARACTERISTICS
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
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.”
TYPICAL PERFOR A CE CHARACTERISTICS
Reverse Characteristics
100
Dynamic Impedance
100
10
1
0.1
0.01
6.25
TJ = 25°C
STABILIZED
(TJ ≈ 90°C)
6.45
6.65
6.85
7.05
REVERSE VOLTAGE (V)
LM199 G01
Initial Heater Current
250
VH = 40V
200
150
100
50
0
–55 –35 –15 5 25 45 65 85 105 125
TURN ON TEMPERATURE (°C)
LM199 G04
10
STABILIZED
(TJ ≈ 90°C)
1
TJ = 25°C
0.1
10
100
1k
10k
100k
FREQUENCY (Hz)
LM199 G02
Heater Current
80
60
VH = 10V
40
VH = 20V
VH = 30V
20
VH = 40V
0
–55 –35 –15 5 25 45 65
TEMPERATURE (°C)
85 105
LM199 G05
Stabilization Time
1
VH = 15V
TA = 25°C
0
TA = –55°C
–1
–2
–3
–4
0
4
8
12
16
20
HEATER ON TIME (SECONDS)
LM199 G03
Heater Current
160
TA = 25°C
140
120
100
80
VH = 10V
60
VH = 20V
VH = 30V
40
20
VH = 40V
0
0 2 4 6 8 10 12 14 16 18
TIME (SECONDS)
LM199 G06
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3
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