A
DVANCED
L
INEAR
D
EVICES,
I
NC.
ALD2301A/ALD2301B
ALD2301/ALD2301C
DUAL PRECISION CMOS VOLTAGE COMPARATOR WITH OPEN DRAIN DRIVER
GENERAL DESCRIPTION
The ALD2301A/ALD2301B/ALD2301/ALD2301C is a monolithic high
performance dual voltage comparator built with advanced silicon gate
CMOS technology. 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; 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,
such as wired-OR connection. The outputs can be connected to a
higher external voltage than V
+
.
The ALD2301A/ALD2301B/ALD2301/ALD2301C is ideal for a great
variety of voltage comparator applications, especially low level signal
detection circuits requiring low standby power, yet retaining high
output current capability as needed.
APPLICATIONS
• High source impedance voltage
comparison circuits
• Dual limit window comparator
• Power supply voltage monitor
• Photo-detector sensor circuit
• Relay or LED driver
• Oscillators
• Battery operated instruments
• Remote signal detection
PIN CONFIGURATION
OUT
1
1
2
3
4
TOP VIEW
DA, PA, SA PACKAGE
8
7
6
5
V
+
OUT
2
-IN
2
+IN
2
FEATURES
• Fanout of 30 LS TTL loads
• Low supply current of 110µA typical
• Functional equivalent to LM193 industry
standard comparators
• 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
ORDERING INFORMATION
Operating Temperature Range *
-55°C to +125°C
0°C to +70°C
0°C to +70°C
8-Pin
CERDIP
Package
8-Pin
Small Outline
Package (SOIC)
8-Pin
Plastic Dip
Package
-IN
1
+IN
1
GND
BLOCK DIAGRAM
(8) V
+
INVERTING INPUT
-IN
1
(2)
NONINVERTING INPUT
+IN
1
(3)
V
+
INVERTING INPUT
-IN
2
(6)
NONINVERTING INPUT
+IN
2
(5)
(4) GND
(7) OUT
2
(1) OUT
1
ALD 2301A DA
ALD 2301B DA
ALD 2301 DA
ALD 2301C DA
ALD2301A SA
ALD 2301B SA
ALD 2301 SA
ALD 2301C SA
ALD2301A PA
ALD2301B PA
ALD2301 PA
ALD2301C PA
* Contact factory for industrial temperature range
© 1998 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 PA, SA package
DA 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
Parameter
Voltage
Supply
Supply
Current
Voltage Gain
Input Offset
Voltage
Input Offset
Current
1
Input Bias
Current
1
Common
Mode Input
Voltage
Range
2
Symbol Min
V+
3
2301
Typ
Max
12
Min
3
2301A
Typ
Max
12
Min
3
2301B
Typ Max
12
Min
3
2301C
Typ
Max
12
Unit
V
R
LOAD
=
∞
Test
Conditions
IS
110
180
110
180
110
180
110
180
µA
A
VD
V
OS
50
150
10
50
150
2
50
150
5
50
150
20
V/mV R
LOAD
≥
15KΩ
mV
R
LOAD
≥
1.5KΩ
I
OS
10
200
10
200
10
200
10
400
pA
I
B
10
200
10
200
10
200
10
400
pA
V
ICR
-0.3
V
+
-1.5
-0.3
V
+
-1.5
-0.3
V
+
-1.5
-0.3
V
+
-1.5
V
Low Level
V
OL
Output Voltage
0.15
0.4
0.15
0.4
0.15
0.4
0.15
0.4
V
I
SINK
= 12mA
V
INPUT
= 1V
Differential
Low Level
Output
Current
High Level
Leakage
Current
Response
Time
2
I
OL
24
60
24
60
24
60
24
60
mA
V
OL
= 1.0 V
I
OH
.01
20
.01
20
.01
20
.01
20
nA
V
OH
= 5.0 V
t
RP
650
650
650
650
ns
R
L
= 5.1KΩ
C
L
= 15pF
100mV Input
Step/5mV
Overdrive
R
L
= 5.1KΩ
C
L
=15pF
TTL - Level
Input Step
300
300
300
300
ns
Notes :
1
2
Consists of junction leakage currents.
Sample tested parameters.
7-2
Advanced Linear Devices
ALD2301A/ALD2301B
ALD2301/ALD2301C
TYPICAL PERFORMANCE CHARACTERISTICS
TOTAL SUPPLY CURRENT vs.
TOTAL SUPPLY VOLTAGE
V+
SUPPLY CURRENT (
µA)
SUPPLY CURRENT (µA)
SUPPLY CURRENT vs. TEMPERATURE
200
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
DUAL LIMIT WINDOW COMPARATOR
V+
1/2 ALD2301
V
REF(HIGH)
V+
DUAL LIMIT PHOTO-DETECTOR
MONITOR
V
External
VOLTAGE COMPARATOR WITH
COMPLEMENTARY OUTPUTS
+
-
R
LOAD
V+
BUZZER
1/2 ALD2301
LED
+
-
V
REF
Q
1/2 ALD2301
V
LIMIT2
+
V
OUT
-
V
IN
V
REF(LOW)
+
LIGHT
V
LIMIT 1
V
IN
+
-
Q
1/2 ALD2301
-
1/2 ALD2301
+
PHOTO-
DETECTOR
-
1/2 ALD2301
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.
7-4
Advanced Linear Devices
ALD2301A/ALD2301B
ALD2301/ALD2301C
Embedded System
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