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参数资料
| 型号： | ISL55143 |
| 厂商： | Intersil Corporation |
| 英文描述： | High-Speed 18V CMOS Comparators(高速18V CMOS比较器) |
| 中文描述： | 高速18V的CMOS比较器（高速18V的的CMOS比较器） |
| 文件页数： | 5/14页 |
| 文件大小： | 370K |
| 代理商： | ISL55143 |
5
FN6230.0
July 17, 2006
DIGITAL OUTPUTS Q
AX
, Q
BX
Output Resistance
RoutR
18
27
37
Ω
Output Logic High Voltage
V
OH
V
OL
V
OH
= 5V, I
SOURCE
= 1mA
V
OL
= 0V, I
SINK
= 1mA
4.9
4.95
5.0
V
Output Logic Low Voltage
0.00
0.05
0.1
V
POWER SUPPLIES, STATIC CONDITIONS
Positive Supply DC Current/Comparator
I
CC
I
EE
P
No input data
+8.25
12.5
mA
Negative Supply Current/Comparator
No input data
-12.5
-8.25
mA
Total Power Dissipation/Comparator
Input data at 40MHz
670
mW
Total Power dissipation per comparator can be approximately calculated from the following:
P = (V
CC
-V
EE
)*8.25mW + 90pF*(V
CC
-V
EE
)^2*f + C
L
*(V
CC
-V
EE
)^2*f
where f is the operating frequency and C
L
is the load capacitance.
Because the ISL55142 has two comparators, the power dissipation would be twice of P calculated from the above equation. The ISL55143 would
be four times P.
NOTES:
3. Lab characterization, room temperature, timing parameters matched stimulus/loads, channel-to-channel skew < 500ps, 1ns maximum by design
4. Note about I
CC
measurement input can approach 140mA (single comparator) at maximum pattern rates
5. Not 100% Tested
Test Circuits and Waveforms
FIGURE 1. COMPARATOR PROPAGATION DELAY AND TRANSITION TIME MEASUREMENT POINTS
FIGURE 2. THREE-STATE WINDOW COMPARATOR FUNDAMENTALS
Electrical Specifications
Test Conditions: V
CC
= 12V, V
EE
= -3V, V
OH
= 5V, V
OL
= 0V, PD = V
EE
, C
LOAD
= 15pF
,
T
A
=
25°C, unless
otherwise specified.
(Continued)
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
TYP
MAX
UNITS
Q
AX
, Q
BX
400mV
0V
t
PDLH
V
OH
(
≈
V
H
)
V
OL
(
≈
V
L
)
50%
50%
t
PDHL
V
INPX
t
R
t
F
DATA = 1
DATA = 0
+
-
+
-
V
INP
Q
A
Q
B
CV
A
2.4V
CV
B
0.4V
V
CC
V
EE
Although there is no electrical difference between the CV
A
and CV
B
Inputs, if one defines CV
A
as being the high
threshold and CV
B
being the low threshold, it becomes
easier to understand the utilization of a dual threshold
comparator. Essentially this enables the qualification of an
incoming signal into three states. In the case pictured, the
three states are Valid Low <0.4V, No-man’s-land (between
0.4 and 2.4V), Valid High >2.4V. Table 2 shows how the
Q
A
/Q
B
truth table would be utilized in the real world.
TABLE 2. Q
A
/Q
B
TRUTH TABLE
V
INP
Q
A
Q
B
COMMENT
<0.4V
0
0
Valid 0
>0.4 and <2.4V
0
1
Invalid
>2.4V
1
1
Valid 1
ISL55141, ISL55142, ISL55143
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