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參數資料
| 型號： | LM903 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | Fluid Level Detector |
| 中文描述： | 液位檢測器 |
| 文件頁數： | 2/8頁 |
| 文件大小： | 148K |
| 代理商： | LM903 |
Absolute Maximum Ratings
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales
Office/Distributors for availability and specifications.
Supply Voltage, V
CC
Control Input Voltage (Pin 7)
18V
18V
Transient Voltage (Pins, 6, 7, 9) 10 ms (Note 1)
70V
Output Current (Pin 4) I
4
(Sink)
10 mA
Operating Temperature Range
b
40
§
C to
a
85
§
C
b
55
§
C to
a
150
§
C
Storage Temperature
Maximum Junction Temperature
a
150
§
C
260
§
C
Lead Temperature (Soldering, 10 sec.)
Electrical Characteristics
V
CC
e
12V, C
T
e
33
m
F, R
T
e
7.5 k
X
, T
A
within operating range except where stated otherwise
Tested Limits
(Note 2)
Design Limits
(Note 3)
Symbol
Parameter
Conditions
Units
Min
Max
Min
Typ
Max
V
CC
Supply Voltage
7.0
18
7.0
13
18
V
I
S
Supply Current
50
50
mA
V
REG
Regulated Voltage
5.5
6.2
5.3
5.8
6.3
V
Regulation
Temperature Drift
V
CC
e
7.2V–18V
105
mV
m
V/
§
C
500
V
6
–V
3
Probe Current
Reference Voltage
2.0
2.35
1.95
2.20
2.40
V
V
REF
Measurement Reference Voltage
790
900
780
850
910
mV
R
REF
Reference Input Resistor
1.2
k
X
V
7
Start Input Logic High Level
1.6
V
V
7
Start Input Logic Low Level
1.0
V
I
7
High Input Current
Latch Off
100
nA
I
7
Latch Holding Current
Latch On
2.5
nA
R
7
Resistance Pin 7
Latch On
22
k
X
I
12
Ramp Current
See Timing Diagram
Charging
V
12
e
0V–1V
600
1100
590
1100
m
A
V
12
e
1V–4V
53
93
50
96
m
A
Discharging
V
12
e
4.1V
b
700
b
450
b
710
b
440
m
A
V
12
e
0.5V
b
650
b
400
b
660
b
390
m
A
V
12
Ramp Threshold
See Timing Diagram
Probe Current Start
570
850
550
710
870
mV
First Measurement
910
1200
890
1055
1220
mV
Second Measurement
910
1240
890
1080
1270
mV
V
1
Probe Input Voltage Range
V
CC
e
7.5V–18V
1
V
REG
b
1.0
V
V
5
Probe Open-Circuit Threshold
At Pin 5
V
REG
b
0.85 V
REG
b
0.6
V
V
5
Probe Short-Circuit Threshold
0.6
0.85
V
I
1
Pin 1 Input Leakage Current
Pin 1
e
300 mV
b
3.5
a
3.5
a
5.0
nA
I
15
Pin 15 Leakage Current
V
15
e
2V, V
7
e
12V
b
3.5
3.5
m
A
Pin 15 Charging Current
V
15
e
4V, V
7
e
12V
60
m
A
f
9
Lamp Oscillation Frequency
C
L
e
3.3
m
F
0.5
1.5
2.5
Hz
I
9
Lamp Driver Current
Flashing Mode
600
mA
V
9
Lamp Driver Saturation
I
9
e
200 mA
200
250
mA
2
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