A
DVANCED
L
INEAR
D
EVICES,
I
NC.
ALD4301A/ALD4301
QUAD PRECISION CMOS VOLTAGE COMPARATOR WITH OPEN DRAIN DRIVER
GENERAL DESCRIPTION
The ALD4301A/ALD4301 is a monolithic high performance quad
voltage comparator built with advanced silicon gate CMOS technol-
ogy. It features very high typical input impedance of 10
12
Ω;
low input
bias current of 10pA; fast response time of 300ns; very low power
dissipation of 55µA per comparator; high output drive and single +5V
or dual
±5V
power supply operation.
The input voltage range includes ground, making this comparator ideal
for low level signal detection with high source impedance. The outputs
are open-drain configuration, allowing maximum application flexibility.
The outputs can be connected to a higher external voltage than V
+
and
used in a wired-OR connection with other open drain circuits such as
ALD2301/ALD2303. They can also be used with push-pull output
types such as ALD2302/ALD4302 voltage comparators simultaneously
with open drain comparators using a common V+. The ALD4301A/
ALD4301 is ideal for a great variety of voltage comparator applica-
tions, especially detection circuits requiring very low input currents
and low standby power, yet retaining high output current capability.
FEATURES
•
•
•
•
•
•
•
•
•
•
•
•
•
Fanout of 30 LS TTL loads
Low supply current of 55µA/comparator typical
Pinout/Functional equivalent to LM393 types
Extremely low input bias currents -- 10pA typical
Virtually eliminates source impedance effects
Low operating supply voltage of 3V to 12V
Single +5V and dual supply
±5V
operation
High speed for both large signal and low level
signals -- 300ns typical for TTL inputs
CMOS, NMOS and TTL compatible
Wired-OR open drain outputs
High output sinking current -- 60mA typical
Low supply current spikes
High gain
APPLICATIONS
• High source impedance voltage
comparison circuits
• Dual/Quad limit window comparator
• Power supply voltage monitor
• Photo-detector sensor circuit
• Relay or LED driver
• Oscillators
• Battery operated instruments
• Remote signal detection
PIN CONFIGURATION
02
01
V
+
-IN
1
+IN
1
-IN
2
+IN
2
1
14
03
04
GND
+IN
4
-IN
4
+IN
3
-IN
3
2
13
3
4
12
11
5
10
6
9
7
8
DB, PB, SB PACKAGE
BLOCK DIAGRAM
V
+
INVERTING INPUT
- IN
1
(4)
NONINVERTING INPUT
+ IN
1
(5)
INVERTING INPUT
- IN
2
(6)
NONINVERTING INPUT
+ IN
2
(7)
INVERTING INPUT
- IN
3
(8)
(3)
ORDERING INFORMATION
Operating Temperature Range *
-55°C to +125°C
0°C to +70°C
0°C to +70°C
14-Pin
CERDIP
Package
14-Pin
Small Outline
Package (SOIC)
14-Pin
Plastic Dip
Package
-
(2) OUT
1
+
-
(1) OUT
2
+
-
(14) OUT
3
ALD 4301ADB
ALD 4301DB
ALD4301ASB
ALD4301SB
ALD4301APB
ALD4301PB
NONINVERTING INPUT
+ IN
3
(9)
INVERTING INPUT
- IN
4
(10)
NONINVERTING INPUT
+ IN
4
(11)
+
-
(13) OUT
4
+
* Contact factory for industrial temperature range
(12)
© 2005 Advanced Linear Devices, Inc. 415 Tasman Drive, Sunnyvale, California 94089 -1706 Tel: (408) 747-1155 Fax: (408) 747-1286 http://www.aldinc.com
ABSOLUTE MAXIMUM RATINGS
Supply voltage, V
+
Differential input voltage range
Power dissipation
Operating temperature range PB, SB package
DB package
Storage temperature range
Lead temperature, 10 seconds
13.2V
-0.3V to
V
+
+0.3V
600 mW
0°C to +70°C
-55°C to +125°C
-65°C to +150°C
+260°C
OPERATING ELECTRICAL CHARACTERISTICS
T
A
= 25
°
C V+= +5V unless otherwise specified
4301A
Parameter
Voltage
Supply
Supply
Current
Voltage
Gain
Input Offset
Voltage
Input Offset
Current
1
Input Bias
Current
1
Common
Mode Input
Voltage
Range
2
Low Level
Output
Voltage
Low Level
Output
Current
High Level
Leakage
Current
Response
Time
2
Symbol
V
+
Min
3
±1.5
220
Typ
Max
12
±6
350
Min
3
±1.5
220
4301
Typ
Max
12
±6
350
Unit
V
V
µA
Test
Conditions
Single supply
Dual supplies
No load
I
S
A
VD
50
150
50
150
V/mV
R
LOAD
≥
15KΩ
R
LOAD
≥
1.5KΩ
V
OS
5
10
mV
I
OS
0.1
30
0.1
30
pA
I
B
0.1
30
0.1
30
pA
V
ICR
-0.3
V
+-1.5
-0.3
V
+ -1.5
V
V
OL
0.15
0.4
0.15
0.4
V
I
SINK
=12mA
V
INPUT
=1V
Differential
I
OL
24
60
24
60
mA
V
OL
=1.0V
I
LH
0.1
20
0.1
20
nA
V
OH
= 5.0 V
t
RP
650
650
ns
R
L
=5.1KΩ
C
L
= 15pF
100mV Input
Step/5mV
Overdrive
RL = 5.1KΩ
C
L
= 15pF
TTL- Level Input
Step
300
300
ns
Notes:
1
2
Consists of junction leakage currents
Sample tested parameters
ALD4301A/ALD4301
Advanced Linear Devices
TYPICAL PERFORMANCE CHARACTERISTICS
TOTAL SUPPLY CURRENT vs.
TOTAL SUPPLY VOLTAGE
V+
200
SUPPLY CURRENT (µA)
SUPPLY CURRENT vs. TEMPERATURE
SUPPLY CURRENT (
µA)
160
140
120
100
80
2.0
-
+
T
A
= 25°C
R
L
=
∞
180
160
140
120
100
80
60
V
S
=
±2.5V
No Load
All comparators
4.0
6.0
8.0
10.0
12.0
-55
-25
0
25
50
75
100
125
SUPPLY VOLTAGE (V)
TEMPERATURE (°C)
INPUT OFFSET VOLTAGE vs.
TEMPERATURE
3.0
OFFSET VOLTAGE (mV)
2.8
2.6
2.4
2.2
2.0
1.8
-55
-25
0
25
50
75
100
125
TEMPERATURE (°C)
V
CM
= 0V
V
S
=
±
2.5V
TYPICAL APPLICATIONS
QUAD LIMIT WINDOW COMPARATOR
QUAD LIMIT PHOTO-DETECTOR
MONITOR
V
External
V+
VOLTAGE COMPARATOR WITH
COMPLEMENTARY OUTPUTS
V+
1/2 ALD4301
V
REF(HIGH)
R
LOAD
BUZZER
1/2 ALD4301
V+
+
-
+
LED
Q
1/2 ALD4301
V
LIMIT2
+
-
V
REF
V
IN
V
OUT
-
V
LIMIT 1
V
IN
V
REF(LOW)
+
LIGHT
+
-
Q
1/2 ALD4301
+
-
1/2 ALD4301
PHOTO-
DETECTOR
-
1/2 ALD4301
MINIMUM R
LOAD
= 1.5KΩ
OUTPUT HIGH FOR V
IN
< V
REF(HIGH)
AND V
IN
> V
REF(LOW)
LED turns on as photo-detector voltage
reaches V
LIMIT1.
Both LED and horn turns on
as photo-detector voltage reaches V
LIMIT2.
V EXTERNAL = +12V V+ = +5V.
ALD4301A/ALD4301
Advanced Linear Devices
Embedded System
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