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參數(shù)資料
| 型號： | LM612 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | Dual-Channel Comparator and Reference |
| 中文描述： | 雙通道比較器和參考 |
| 文件頁數(shù)： | 3/10頁 |
| 文件大?。?/td> | 244K |
| 代理商： | LM612 |
Electrical Characteristics
These specifications apply for V
b
e
GND
e
0V, V
a
e
5V, V
CM
e
V
OUT
e
V
a
/2,
I
R
e
100
m
A, unless otherwise specified. Limits in standard typeface are for T
J
e
25
§
C; limits in
boldface type
apply over the
Operating Temperature Range.
(Continued)
Symbol
Parameter
Conditions
(Note 7)
Typical
LM612AM
LM612AI
Limits
(Note 8)
LM612M
LM612I
Limits
(Note 8)
Units
VOLTAGE REFERENCE
(Note 9)
V
R
Reference Voltage
1.244
1.2365
1.2515
(
g
0.6%)
1.2191
1.2689
(
g
2%)
V Min
V Max
D
V
R
D
T
Average Drift with
Temperature
(Note 10)
18
80
150
ppm/
§
C
Max
D
V
R
kH
Average Drift with
Time
T
J
e
40
§
C
T
J
e
150
§
C
400
1000
ppm/kH
ppm/kH
D
V
R
D
T
J
Hysteresis
(Note 11)
3.2
m
V/
§
C
D
V
R
D
I
R
V
R
Change with
Current
V
R
[
100
m
A
]
b
V
R
[
17
m
A
]
0.05
0.1
1
1
mV Max
mV Max
1.1
1.1
V
R
[
10 mA
]
b
V
R
[
100
m
A
]
(Note 12)
1.5
2.0
5
5
mV Max
mV Max
5.5
5.5
R
Resistance
D
V
R
[
10 mA to 0.1 mA
]
/9.9 mA
D
V
R
[
100
m
A to 17
m
A
]
/83
m
A
0.2
0.6
0.56
13
0.56
13
X
Max
X
Max
D
V
R
D
V
a
V
R
Change with
V
a
Change
V
R
[
V
a e
5V
]
b
V
R
[
V
a e
36V
]
0.1
0.1
1.2
1.3
1.2
1.3
mV Max
mV Max
V
R
[
V
a e
5V
]
b
V
R
[
V
a e
3V
]
0.01
0.01
1
1
mV Max
mV Max
1.5
1.5
e
n
Voltage Noise
BW
e
10 Hz to 10 kHz
30
m
V
RMS
Note 1:
Absolute maximum ratings indicate limits beyond which damage to the component may occur. Electrical specifications do not apply when operating the
device beyond its rated operating conditions.
Note 2:
Input voltage above V
a
is not allowed. As long as one input pin voltage remains inside the common-mode range, the comparator will deliver the correct
output.
Note 3:
More accurately, it is excessive current flow, with resulting excess heating, that limits the voltages on all pins. When any pin is pulled a diode drop below
V
b
, a parasitic NPN transistor turns ON. No latch-up will occur as long as the current through that pin remains below the Maximum Rating. Operation is undefined
and unpredictable when any parasitic diode or transistor is conducting.
Note 4:
Shorting the Output to V
b
will not cause power dissipation, so it may be continuous. However, shorting the Output to any more positive voltage (including
V
a
), will cause 80 mA (typ.) to be drawn through the output transistor. This current multiplied by the applied voltage is the power dissipation in the output transistor.
If this total power causes the junction temperature to exceed 150
§
C, degraded reliability or destruction of the device may occur. To determine junction temperature,
see Note 5.
Note 5:
Junction temperature may be calculated using T
J
e
T
A
a
P
D
i
JA
. The given thermal resistance is worst-case for packages in sockets in still air. For
packages soldered to copper-clad board with dissipation from one comparator or reference output transistor, nominal
i
JA
is 90
§
C/W for the N package.
Note 6:
Human body model, 100 pF discharged through a 1.5 k
X
resistor.
Note 7:
Typical values in standard typeface are for T
J
e
25
§
C; values in
boldface type
apply for the full operating temperature range. These values represent the
most likely parametric norm.
Note 8:
All limits are guaranteed for T
J
e
25
§
C (standard type face) or over the full operating temperature range
(bold type face)
.
Note 9:
V
R
is the reference output voltage, nominally 1.24V.
Note 10:
Average reference drift is calculated from the measurement of the reference voltage at 25
§
C and at the temperature extremes. The drift, in ppm/
§
C, is
10
6
#
D
V
R
/V
R
[
25
C
]
#
D
T
J
, where
D
V
R
is the lowest value subtracted from the highest, V
R
[
25
§
C
]
is the value at 25
§
C, and
D
T
J
is the temperature range. This
parameter is guaranteed by design and sample testing.
Note 11:
Hysteresis is the change in V
R
caused by a change in T
J
, after the reference has been ‘‘dehysterized’’. To dehysterize the reference; that is minimize the
hysteresis to the typical value, its junction temperature should be cycled in the following pattern, spiralling in toward 25
§
C: 25
§
C, 85
§
C,
b
40
§
C, 70
§
C, 0
§
C, 25
§
C.
Note 12:
Low contact resistance is required for accurate measurement.
Note 13:
A military RETS 612AMX electrical test specification is available on request. The military screened parts can also be procured as a Standard Military
Drawing.
3
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