Operating Temperature Range *
-55
C to +125
C
0
C to +70
C
0
C to +70
C
8-Pin
8-Pin
8-Pin
CERDIP
Small Outline
Plastic Dip
Package
Package (SOIC)
Package
ALD 2301A DA
ALD2301A SA
ALD2301A PA
ALD 2301B DA
ALD 2301B SA
ALD2301B PA
ALD 2301 DA
ALD 2301 SA
ALD2301 PA
ALD 2301C DA
ALD 2301C SA
ALD2301C PA
DUAL PRECISION CMOS VOLTAGE COMPARATOR WITH OPEN DRAIN DRIVER
ALD2301A/ALD2301B
ALD2301/ALD2301C
A
DVANCED
L
INEAR
D
EVICES,
I
NC.
ORDERING INFORMATION
PIN CONFIGURATION
BLOCK DIAGRAM
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
; low input bias current of 10pA; fast response time of 300ns; very
low power dissipation of 55
A 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.
FEATURES
Fanout of 30 LS TTL loads
Low supply current of 110
A 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
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
1
2
3
4
8
7
6
5
OUT1
-IN 1
+IN 1
GND
V+
OUT 2
-IN 2
+IN 2
TOP VIEW
DA, PA, SA PACKAGE
(1) OUT
1
(7) OUT
2
(4) GND
V
+
(8) V
+
NONINVERTING INPUT
+IN
1
(3)
INVERTING INPUT
NONINVERTING INPUT
INVERTING INPUT
-IN
1
(2)
+IN
2
(5)
-IN
2
(6)
* 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
7-2
Advanced Linear Devices
ALD2301A/ALD2301B
ALD2301/ALD2301C
Voltage
V+
3
12
3
12
3
12
3
12
V
Supply
Supply
IS
110
180
110
180
110
180
110
180
A
R
LOAD
=
Current
Voltage Gain
A
VD
50
150
50
150
50
150
50
150
V/mV
R
LOAD
15K
Input Offset
V
OS
10
2
5
20
mV
R
LOAD
1.5K
Voltage
Input Offset
I
OS
10
200
10
200
10
200
10
400
pA
Current
1
Input Bias
I
B
10
200
10
200
10
200
10
400
pA
Current
1
Common
Mode Input
V
ICR
-0.3
V
+
-1.5
-0.3
V
+
-1.5
-0.3
V
+
-1.5
-0.3
V
+
-1.5
V
Voltage
Range
2
Low Level
V
OL
0.15
0.4
0.15
0.4
0.15
0.4
0.15
0.4
V
I
SINK
= 12mA
Output Voltage
V
INPUT
= 1V
Differential
Low Level
Output
I
OL
24
60
24
60
24
60
24
60
mA
V
OL
= 1.0 V
Current
High Level
Leakage
I
OH
.01
20
.01
20
.01
20
.01
20
nA
V
OH
= 5.0 V
Current
Response
t
RP
650
650
650
650
ns
R
L
= 5.1K
Time
2
C
L
= 15pF
100mV Input
Step/5mV
Overdrive
300
300
300
300
ns
R
L
= 5.1K
C
L
=15pF
TTL - Level
Input Step
ABSOLUTE MAXIMUM RATINGS
Supply voltage, V
+
13.2V
Differential input voltage range
-0.3V to V
+
+0.3V
Power dissipation
600 mW
Operating temperature range
PA, SA package
0
C to +70
C
DA package
-55
C to +125
C
Storage temperature range
-65
C to +150
C
Lead temperature, 10 seconds
+260
C
OPERATING ELECTRICAL CHARACTERISTICS
T
A
= 25
C V
+
= +5V unless otherwise specified
2301
2301A
2301B
2301C
Test
Parameter
Symbol
Min
Typ
Max
Min
Typ
Max
Min
Typ
Max
Min
Typ
Max
Unit
Conditions
Notes :
1
Consists of junction leakage currents.
2
Sample tested parameters.
ALD2301A/ALD2301B
Advanced Linear Devices
7-3
ALD2301/ALD2301C
7
TYPICAL PERFORMANCE CHARACTERISTICS
SATURATION VOLTAGE vs.
SINK CURRENT
OUTPUT SINK CURRENT (mA)
0
15
30
45
60
75
1.5
1.2
0.9
0.6
0.3
0.0
OUTPUT SATURATION
VOLTAGE (V)
V
S
=
2.5V
-55
C
25
C
-25
C
85
C
125
C
0.4
0.0
0.2
0.6
0.8
1.0
1.2
1.4
TIME (
S
)
-2.5
0.0
+2.5
0
100
OUTPUT
VOLTAGE (V)
INPUT
VOLTAGE (mV)
T
A
= 25
C
V
S
=
2.5V
2mV
10mV
20mV
50mV
5mV
RESPONSE TIME FOR VARIOUS
INPUT OVERDRIVES
5.1K
0V
V
IN
V+
V-
V
OUT
+
-
SATURATION VOLTAGE
vs.TEMPERATURE
TEM PERATURE (
C)
-55
-25
0
25
50
125
100
75
1.4
1.2
1.0
0.8
0.6
0.4
0.2
SATURATION VOLTAGE (V)
0
V
S
=
2.5V
I
SINK
= 50mA
TRANSFER FUNCTION
DIFFERENTIAL INPUT VOLTAGE (mV)
+6.0
-6.0
0.0
OUTPUT VOLTAGE (V)
+2.5
0.0
-2.5
TA = 25
C
VS =
6V
RL = 5.1K
TIM E (
s)
0.0
0.2
0.4
0.8
0.6
1.2
1.0
1.4
RESPONSE TIME FOR VARIOUS
INPUT OVERDRIVES
+2.5
100
0
0.0
-2.5
INPUT
VOLTAGE (mV)
OUTPUT
VOLTAGE (V)
T
A
= 25
C
V
S
=
2.5V
50mV
20mV
5mV
10mV
2mV
5.1K
0V
V
IN
V+
V-
V
OUT
+
-
COMMON - MODE VOLTAGE REFERRED
TO SUPPLY VOLTAGE
TEMPERATURE (
C)
0.5
V+
-0.5
-1.0
0.5
V-
-0.5
COMMON - MODE VOLTAGE LIMITS (V)
-55
-25
0
25
50
125
100
75
V
S
=
2.5V
7-4
Advanced Linear Devices
ALD2301A/ALD2301B
ALD2301/ALD2301C
TYPICAL PERFORMANCE CHARACTERISTICS
120
100
80
60
140
0
25
50
75
-25
-55
TEMPERATURE (
C)
SUPPLY CURRENT (
A)
100
160
180
200
125
V
S
=
2.5V
No Load
All comparators
SUPPLY CURRENT vs. TEMPERATURE
2.4
2.2
2.0
1.8
2.6
0
25
50
75
-25
-55
TEMPERATURE (
C)
OFFSET VOLTAGE (mV)
100
2.8
3.0
125
V
CM
= 0V
V
S
=
2.5V
INPUT OFFSET VOLTAGE vs.
TEMPERATURE
TYPICAL APPLICATIONS
140
120
100
80
160
6.0
8.0
10.0
12.0
4.0
2.0
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (
A)
T
A
= 25
C
R
L
=
-
+
V+
TOTAL SUPPLY CURRENT vs.
TOTAL SUPPLY VOLTAGE
DUAL LIMIT WINDOW COMPARATOR
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.
DUAL LIMIT PHOTO-DETECTOR
MONITOR
VOLTAGE COMPARATOR WITH
COMPLEMENTARY OUTPUTS
+
+
-
-
1/2 ALD2301
OUTPUT HIGH FOR V
IN
< V
REF(HIGH)
MINIMUM R
LOAD
= 1.5K
>
AND
V
OUT
V
IN
V+
V
REF(HIGH)
1/2 ALD2301
V
REF(LOW)
V
REF(LOW)
R
LOAD
V
IN
-
-
+
+
Q
Q
V
IN
V
REF
V+
1/2 ALD2301
1/2 ALD2301
V+
VLIMIT2
PHOTO-
DETECTOR
LIGHT
-
-
+
+
LED
BUZZER
VLIMIT 1
VExternal
1/2 ALD2301
1/2 ALD2301
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