LM399_15 Datasheet, PDF (4/8 Pages) Linear Technology – Precision Reference

LM199/LM399
LM199A/LM399A
Typical Performance Characteristics
Initial Heater Current
250 _{VH = 40V}
200
150
100
Heater Current
80
60
V_H = 10V
40
V_H = 20V
V_H = 30V
50
0
–55 –35 –15 5 25 45 65 85 105 125
TURN ON TEMPERATURE (°C)
LM199 G04
20
V_H = 40V
0
–55 –35 –15 5 25 45 65
TEMPERATURE (°C)
85 105
LM199 G05
Heater Current
160
T_A = 25°C
140
120
100
80
V_H = 10V
60
V_H = 20V
V_H = 30V
40
20
V_H = 40V
0
0 2 4 6 8 10 12 14 16 18
TIME (SECONDS)
LM199 G06
Zener Noise Voltage
200
150
100
50
10
STABILIZED
(T_J ≈ 90°C)
T_J = 25°C
100
1k
10k
100k
FREQUENCY (Hz)
LM199 G07
Response Time
8
OUTPUT
7
6
5
STABILIZED
(T_J ≈ 90°C)
4
T_J = 25°C
3
2
7.5k
1
INPUT
0
OUTPUT
20
10
INPUT
0
0
100 200 300 400
TIME (µs)
LM199 G08
Limiting Surge Current
800
700
600
500
25°C (46mA)
5°C (60mA)
400
–15°C (71mA)
–35°C (87mA)
300
–55°C (105mA)
200
100
0
0
10
20
30
40
MINIMUM SUPPLY VOLTAGE (V)
HEATER MUST BE BYPASSED WITH A 2µF OR LARGER
TANTALUM CAPACITOR IF RESISTORS ARE USED
LM199 G09
Long-Term Reference
Performance, 44 Units Tested
12
Low Frequency Noise Voltage
10
8
3 SIGMA
6
4
MEAN
2
0
2
4
6
8
MONTHS
10
12
LM199 G10
0
50
100 150 200 250
TIME (SECONDS)
LM199 G11
199399fc
4
For more information www.linear.com/LM399