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Data Sheet
June 14, 2001
ntac TERSIL
co
8-IN
1-88
EL5281
FN7188
Dual 8ns High-Speed Comparator
The EL5281 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 EL5281 can be used to hold the
comparator output value by applying a low logic level to the
pin. The EL5281 features two separate comparators.
The EL5281 is available in the 14-pin SO package and is
specified for operation over the full -40°C to +85°C
temperature range. Also available are a single (EL5181) and
quad versions (EL5481 and EL5482).
Features
• 8ns 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
• Single Available (EL5181)
• Quad Available (EL5481 & EL5482)
• Pin-compatible 4ns Family Available (EL5x85, EL5287 &
EL5486)
Applications
• Threshold Detection
• High Speed Sampling Circuits
• High Speed Triggers
Pinout
EL5281
(14-PIN SO)
TOP VIEW
VS+ 1
INA+ 2
INA- 3
NC 4
INB+ 5
INB- 6
VS- 7
+
-
+
-
14 VSD
13 OUTA
12 LATCHA
11 NC
10 LATCHB
9 OUTB
8 GND
• Line Receivers
• PWM Circuits
• High Speed V/F Converters
Ordering Information
PART NUMBER
EL5281CS
EL5281CS-T7
EL5281CS-T13
PACKAGE
14-Pin SO
14-Pin SO
14-Pin SO
TAPE & REEL
-
7”
13”
PKG. NO.
MDP0027
MDP0027
MDP0027
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 321-724-7143
|
Intersil (and design) is a registered trademark of Intersil Americas Inc.
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.
EL5281
Absolute Maximum Ratings
(T
A
= 25°C)
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 . . . . . . . . . . . . . . . . . .-65°C to +150°C
Ambient Operating Temperature . . . . . . . . . . . . . . . .-40°C to +85°C
Operating Junction Temperature . . . . . . . . . . . . . . . . . . . . . . . 125°C
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
PARAMETER
INPUT
V
OS
I
B
C
IN
I
OS
V
CM
CMRR
OUTPUT
V
OH
V
OL
V
S
= ±5V, V
SD
= 5V, R
L
= 2.3kΩ, C
L
= 15pF, T
A
= 25°C, unless otherwise specified.
CONDITION
MIN
TYP
MAX
UNIT
DESCRIPTION
Input Offset Voltage
Input Bias Current
Input Capacitance
Input Offset Current
Input Voltage Range
Common-mode Rejection Ratio
V
CM
= 0V, V
O
= 2.5V
-6
1
-3.5
5
4
mV
µA
pF
V
CM
= 0V, V
O
= 2.5V
-2.5
(V
S
-) - 0.1
0.5
2.5
(V
S
+) - 2.25
µA
V
dB
-5.1V < V
CM
< +2.75V
65
90
Output High Voltage
Output Low Voltage
V
IN
> 250mV
V
IN
> 250mV
V
SD
- 0.6
V
SD
- 0.4
GND + 0.25
GND + 0.5
V
V
DYNAMIC PERFORMANCE
t
PD
+
t
PD
-
SUPPLY
I
S
+
I
S
-
I
SD
Positive Analog Supply Current
Negative Analog Supply Current
Digital Supply Current
Output high
Output low
PSRR
LATCH
V
LH
V
LL
I
LH
I
LL
t
D
+
t
D
-
t
S
t
H
t
PW
(D)
Latch Input Voltage High
Latch Input Voltage Low
Latch Input Current High
Latch Input Current Low
Latch Disable to High Delay
Latch Disable to Low Delay
Minimum Setup Time
Minimum Hold Time
Minimum Latch Disable Pulse Width
V
LH
= 3.0V
V
LL
= 0.3V
0.8
-30
-30
-18
-24
6
6
2
1
10
2.0
V
V
µA
µA
ns
ns
ns
ns
ns
Power Supply Rejection Ratio
60
7
5
4
0.75
80
8.2
6.5
5
1
mA
mA
mA
mA
dB
Positive Going Delay Time
Negative Going Delay Time
V
IN
= 1V
P-P
, V
OD
= 50mV
V
IN
= 1V
P-P
, V
OD
= 50mV
8
8
12
12
ns
ns
2
EL5281
Typical Performance Curves
Positive Supply Current vs Temperature
7.15
7.1
7.05
7
I
S
+ (mA)
6.95
6.9
6.85
6.8
6.75
6.7
-50
-30
-10
10
30
50
70
90
I
S
- (mA)
-4.4
-4.5
-4.6
-4.7
-4.8
-4.9
-5
-5.1
-5.2
-50
-30
-10
10
30
50
70
90
Negative Supply Current vs Temperature
Temperature (°C)
Positive Supply Current vs Supply Voltage
7
6
5
I
S
+ (mA)
4
3
2
3.5
1
0
0
1
2
3
4
5
6
7
V
S
+ (V)
Input Bias Current vs Temperature
6
5
4
V
OS
(mV)
IB (µA)
3
2
1
0
-50
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
-0.1
-0.2
-30
-10
10
30
50
70
90
-0.3
-50
-30
-10
3
0
1
2
V
S
-=-5V
V
SD
=5V
V
IN
=50mV
T
A
=25°C
I
S
- (mA)
5.5
V
S
+=5V
V
SD
=5V
V
IN
=50mV
T
A
=25°C
Temperature (°C)
Negative Supply Current vs Negative Supply
Voltage
5
4.5
4
3
4
5
6
7
V
S
- (V)
Offset Voltage vs Temperature
10
30
50
70
90
Temperature (°C)
Temperature (°C)
3
EL5281
Typical Performance Curves
(Continued)
Propagation Delay vs Overdrive
10
9.5
9
Delay Time (ns)
8.5
8
7.5
7
6.5
6
5.5
5
0
100
200
300
V
OD
(mV)
Propagation Delay vs Supply Voltage
10
9.5
9
Delay Time (ns)
8.5
8
7.5
7
6.5
6
5.5
5
4
4.5
5
±V
S
(V)
Propagation Delay vs Overdrive
11
10.5
10
Delay Time (ns)
9.5
9
8.5
8
7.5
7
0
0.5
1
1.5
V
OD
(V)
2
2.5
3
T
PD
-
V
S
=±5V
V
SD
=5V
R
L
=2.2kΩ
V
IN
=5V Step
T
PD
+
Delay Time (ns)
20
18
16
14
12
10
8
6
5.5
6
T
PD
-
V
SD
=V
S
+
V
IN
=1V Step
V
OD
=50mV
R
L
=2.2kΩ
Delay Time (ns)
T
PD
+
10
9.5
9
8.5
8
7.5
7
6.5
400
500
600
T
PD
-
V
S
=±5V
V
SD
=5V
V
IN
=1V Step
R
L
=2.2kΩ
Delay Time (ns)
T
PD
+
12
11
10
9
8
7
Propagation Delay vs Load Capacitance
V
S
=±5V
V
SD
=5V
R
L
=2.2kΩ
V
IN
=1V Step
V
OD
=50mV
T
PD
+
T
PD
-
6
0
20
40
60
C
LOAD
(pF)
80
100
120
Propagation Delay vs Overdrive
T
PD
+
V
S
=±5V
V
SD
=5V
V
IN
=3V Step
R
L
=2.2kΩ
0.2
0.4
0.6
0.8
1
1.2
T
PD
-
6
0
1.4
1.6
1.8
2
V
OD
(V)
Propagation Delay vs Source Resistance
V
S
=±5V
V
SD
=5V
R
L
=2.2kΩ
V
IN
=1V Step
V
OD
=50mV
T
PD
+
T
PD
-
4
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
Source Resistance (kΩ)
4
EL5281
Typical Performance Curves
(Continued)
Output Low Voltage vs Load Current
0.31
4.75
4.7
Output High Voltage (V)
Output Low Voltage (V)
0.27
T
A
=25°C
0.23
T
A
=85°C
4.65
4.6
4.55
4.5
4.45
4.4
4.35
4.3
0
2
4
6
8
10
Output High Voltage vs Load Current
V
S
=±5V
V
SD
=5V
V
IN
=50mV
T
A
=-40°C
T
A
=25°C
0.19
T
A
=-40°C
T
A
=85°C
V
S
=±5V
V
SD
=5V
V
IN
=-50mV
0.15
Load Current (mA)
Digital Supply Current vs Input Switching
Frequency
30
VS=±5V
25
Power Dissipation (W)
20
I
SD
(mA)
15
10
5
0
0
5
10
15
20
25
30
35
40
45
50
Frequency (MHz)
V
SD
=5V
V
SD
=3V
0
2
4
6
8
10
Load Current (mA)
Package Power Dissipation vs Ambient Temp.
JEDEC JESD51-3 Low Effective Thermal Conductivity
Test Board
0.9
0.8 833mW
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
0
25
50
75 85 100
Ambient Temperature (°C)
125
S
12 O 14
0°
C/
W
Output with 30MHz Input
V
IN
=1V
P-P
V
IN
=1V
P-P
V
S
=±5V
F
IN
=30MH V
SD
=5V
Output with 30MHz Input
V
IN
=3V
P-P
V
IN
=3V
P-P
V
S
=±5V
F
IN
=30MHz V
SD
=5V
V
O
V
O
V
IN
1V
2V
20ns
V
IN
2V
2V
20ns
5
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