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1
FN7179
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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Copyright Intersil Americas Inc. 2003. All Rights Reserved. Elantec is a registered trademark of Elantec Semiconductor, Inc.
All other trademarks mentioned are the property of their respective owners.
EL5185
4ns High-Speed Comparator
The EL5185 comparator is designed
for operation in single supply and dual
supply applications with 5V to 12V
between V
S
+ and V
S
-. For single supplies, the inputs can
operate from 0.1V below ground for use in ground-sensing
applications.
The output side of the comparator can be supplied from a
single supply of 2.7V to 5V. The rail-to-rail output swing
enables direct connection of the comparator to both CMOS
and TTL logic circuits.
The latch input of the EL5185 can be used to hold the
comparator output value by applying a low logic level to the
pin.
The EL5185 is available in the 8-pin SO package and is
specified for operation over the -40C to +85C temperature
range. Also available are dual (EL5285), window comparator
(EL5287), and quad (EL5485 and EL5486) versions.
Pinout
Features
4ns typ. propagation delay
5V to 12V input supply
+2.7V to +5V output supply
True-to-ground input
Rail-to-rail outputs
Active low latch
Dual available (EL5285)
Window comparator (EL5287)
Quad available (EL5485 & EL5486)
Pin-compatible 8ns family available (EL5x81, EL5283 &
EL5482)
Applications
Threshold detection
High speed sampling circuits
High speed triggers
Line receivers
PWM circuits
High speed V/F converters
1
2
3
4
8
7
6
5
V
S
+
L
A
T
C
H
V
SD
OUT
GND
LATCH
IN+
IN-
V
S
-
EL5185
(8-PIN SO)
TOP VIEW
-
+
Ordering Information
PART
NUMBER
PACKAGE
TAPE & REEL
PKG. NO.
EL5185CS
8-Pin SO
-
MDP0027
EL5185CS-T7
8-Pin SO
7"
MDP0027
EL5185CS-T13
8-Pin SO
13"
MDP0027
Data Sheet
January 18, 2002
OBSO
LETE
PRO
DUCT
NO R
ECOM
MEND
ED R
EPLA
CEME
NT
conta
ct ou
r Tec
hnica
l Sup
port C
enter
at
1-888
-INTE
RSIL
or w
ww.in
tersil
.com
/tsc
2
Absolute Maximum Ratings
(T
A
= 25C)
Analog Supply Voltage (V
S
+ to V
S
-) . . . . . . . . . . . . . . . . . . . +12.6V
Digital Supply Voltage (V
SD
to GND) . . . . . . . . . . . . . . . . . . . . .+7V
Differential Input Voltage . . . . . . . . . . .[(V
S
-) -0.2V] to [(V
S
+) +0.2V]
Common-mode Input Voltage . . . . . . .[(V
S
-) -0.2V] to [(V
S
+) +0.2V]
Latch Input Voltage . . . . . . . . . . . . . . . . . . . . -0.2V to [(V
SD
)
+0.2V]
Storage Temperature Range . . . . . . . . . . . . . . . . . . -65C to +150C
Ambient Operating Temperature . . . . . . . . . . . . . . . . -40C to +85C
Operating Junction Temperature . . . . . . . . . . . . . . . . . . . . . . . 125C
Power Dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . See Curves
CAUTION: Stresses above those listed in "Absolute Maximum Ratings" may cause permanent damage to the device. This is a stress only rating and operation of the
device at these or any other conditions above those indicated in the operational sections of this specification is not implied.
IMPORTANT NOTE: All parameters having Min/Max specifications are guaranteed. Typical values are for information purposes only. Unless otherwise noted, all tests
are at the specified temperature and are pulsed tests, therefore: T
J
= T
C
= T
A
Electrical Specifications
V
S
= 5V, V
SD
= 5V, R
L
= 2.3k
, T
A
= 25C, unless otherwise specified.
PARAMETER
DESCRIPTION
CONDITION
MIN
TYP
MAX
UNIT
INPUT
V
OS
Input Offset Voltage
V
CM
= 0V, V
O
= 2.5V
1
4
mV
I
B
Input Bias Current
-10
-5
A
C
IN
Input Capacitance
5
pF
I
OS
Input Offset Current
V
CM
= 0V, V
O
= 2.5V
-2.5
0.5
2.5
A
V
CM
Input Voltage Range
(V
S
-) - 0.1
(V
S
+) - 2.25
V
CMRR
Common-mode Rejection Ratio
-5.1V < V
CM
< +2.75V
65
90
dB
OUTPUT
V
OH
Output High Voltage
V
IN
> 250mV
V
SD
- 0.6
V
SD
- 0.4
V
V
OL
Output Low Voltage
V
IN
> 250mV
GND + 0.25
GND + 0.5
V
DYNAMIC PERFORMANCE
t
PD
+
Positive Going Delay Time
V
IN
= 1V
P-P
, V
OD
= 50mV
4
6
ns
t
PD
-
Negative Going Delay Time
V
IN
= 1V
P-P
, V
OD
= 50mV
4
6
ns
SUPPLY
I
S
+
Positive Analog Supply Current
Per comparator
12
13.5
mA
I
S
-
Negative Analog Supply Current
Per comparator
7.5
8.5
mA
I
SD
Digital Supply Current at No Load
Per comparator, output high
5.5
6.5
mA
Per comparator, output low
0.9
1.2
mA
PSRR
Power Supply Rejection Ratio
55
80
dB
LATCH
V
LH
Latch Input Voltage High
2.0
V
V
LL
Latch Input Voltage Low
0.8
V
I
LH
Latch Input Current High
V
LH
= 3.0V
-30
-18
A
I
LL
Latch Input Current Low
V
LL
= 0.3V
-30
-24
A
t
D
+
Latch Disable to High Delay
4
ns
t
D
-
Latch Disable to Low Delay
4
ns
t
S
Minimum Setup Time
2
ns
t
H
Minimum Hold Time
1
ns
t
PW
(D)
Minimum Latch Disable Pulse Width
5
ns
EL5185
3
Typical Performance Curves
Offset Voltage vs Temperature
-50
-30
10
30
50
70
90
2.5
2
1
0.5
0
-0.5
Temperature (C)
V
O
S
(
m
V
)
1.5
-10
Output Low Voltage vs Temperature
-50
-30
10
30
50
70
90
Temperature (C)
V
O
L
(
V
)
-10
Output High Voltage vs Temperature
-50
-30
10
30
50
70
90
Temperature (C)
V
O
H
(
V
)
-10
Input Bias Current vs Temperature
-50
-30
30
50
90
9
8
4
3
2
1
Temperature (C)
I
B
(
A
)
6
-10
10
70
7
5
Supply Current vs Supply Voltage
14
12
10
8
6
4
2
0
0
1
2
3
4
5
6
V
S
(V)
I
S
(
m
A
)
I
S
+
I
S
-
V
IN
=-50mV
R
L
=2.3k
Supply Current vs Temperature (per comparator)
14
12
10
8
6
4
2
0
-50
-30
10
30
50
70
90
Temperature (C)
S
u
p
p
l
y
C
u
r
r
e
n
t
(
m
A
)
I
S
+
I
S
-
-10
0.4
0.1
0.2
0.3
4.8
4.4
4.2
4
5
4.6
EL5185
4
Typical Performance Curves
(Continued)
Digital Supply Current vs Switching Frequency
(per comparator)
0
20
40
50
25
20
10
0
Frequency (MHz)
I
S
D
(
m
A
)
15
10
5
30
V
S
= 5V
T
A
= 25C
R
L
= 2.3k
V
SD
=5V
V
SD
=3V
Propagation Delay vs Overdrive
V
IN
= 1V
STEP
4.2
4.1
4
3.9
3.8
3.7
3.6
3.5
50 100
200
300
400
500
600
V
OD
(mV)
D
e
l
a
y
T
i
m
e
(
n
s
)
T
PD
+
T
PD
-
150
250
350
450
550
V
S
= 5V
V
SD
= 5V
R
L
= 2.3k
Propagation Delay vs Overdrive
V
IN
= 3V
STEP
6.8
6.6
6.4
6.2
6
5.8
5.4
5
0.2
0.4
0.8
1
1.2
1.6
2
V
OD
(V)
D
e
l
a
y
T
i
m
e
(
n
s
)
T
PD
+
T
PD
-
0.6
1.4
1.8
V
S
= 5V
V
SD
= 5V
R
L
= 2.3k
5.6
5.2
Propagation Delay vs Overdrive
V
IN
= 5V
STEP
7.2
7
6.8
6.6
6.4
6.2
6
5.8
0.2 0.4
1
1.4
1.8
2.2
2.6
V
OD
(V)
D
e
l
a
y
T
i
m
e
(
n
s
)
T
PD
+
T
PD
-
0.6
1.2
1.6
2
2.4
V
S
= 5V
V
SD
= 5V
R
L
= 2.3k
0.8
Propagation Delay vs Source Resistance
V
IN
= 1V
STEP
16
14
10
6
4
0
0.2
0.8
1.2
1.6 1.8
2
Source Resistance (k
)
D
e
l
a
y
T
i
m
e
(
n
s
)
T
PD
+
T
PD
-
0.4
1
1.4
0.6
12
8
V
S
= 5V
V
SD
= 5mV
V
OD
= 50mV
R
L
= 2.3k
Propagation Delay vs Supply Voltage
4.5
4.4
4.2
4
3.8
3.7
3.6
3.5
4
4.2
4.8
5.2
5.6 5.8
6
V
S
(V)
D
e
l
a
y
T
i
m
e
(
n
s
)
T
PD
+
T
PD
-
4.4
5
5.4
V
SD
= V
S
+
V
OD
= 50mV
R
L
= 2.2k
4.6
4.3
4.1
3.9
EL5185
5
Typical Performance Curves
(Continued)
Output with 50MHz Input
V
IN
= 1V
P-P
Output with 50MHz Input
V
IN
= 3V
P-P
Output
(5ns/div,
2V/div)
Input
(5ns/div,
0.5V/div)
Output
(5ns/div,
2V/div)
Input
(5ns/div,
2V/div)
Package Power Dissipation vs Ambient Temp.
JEDEC JESD51-3 Low Effective Thermal Conductivity
Test Board
0.7
0
0.5
0.3
0.2
0.1
P
o
w
e
r
D
i
s
s
i
p
a
t
i
o
n
(
W
)
0.6
0.4
0
125
100
75
50
25
Ambient Temperature (C)
150
85
625mW
160
C
/W
SO
8
Package Power Dissipation vs Ambient Temperature
JEDEC JESD51-7 High Effective Thermal Conductivity Test
Board
1.4
1.2
1
0.8
0.6
0.4
0.2
0
150
125
100
75
50
25
0
85
Ambient Temperature (C)
P
o
w
e
r
D
i
s
s
i
p
a
t
i
o
n
(
W
)
909mW
110
C/W
SO
8
Propagation Delay vs Load Capacitance
V
IN
=1V
STEP
7.5
7
6
5
4
0
10
40
60
80
90 100
C
LOAD
(pF)
D
e
l
a
y
T
i
m
e
(
n
s
)
T
PD
+
T
PD
-
20
50
70
30
6.5
5.5
V
S
= 5V
V
SD
= 5V
V
OD
= 50mV
R
L
= 2.3k
4.5
EL5185
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