DUAL PRECISION CMOS VOLTAGE COMPARATOR WITH PUSH-PULL DRIVER
ALD2302A/ALD2302
APPLICATIONS
PCMCIA instruments
MOSFET driver
High source impedance voltage
comparison circuits
Multiple limit window comparator
Power supply voltage monitor
Photodetector sensor circuit
High speed LED driver
Oscillators
Battery operated instruments
Remote signal detection
Multiple relay drivers
BENEFITS
On-chip input and output buffers
Precision voltage comparison capability
Eliminate need for second power supply
Eliminate pull-up resistor
A
DVANCED
L
INEAR
D
EVICES,
I
NC.
GENERAL DESCRIPTION
The ALD2302A/ALD2302 are monolithic precision high performance
dual voltage comparators built with advanced silicon gate CMOS tech-
nology. The primary features are: very high typical input impedance of
10
12
; low input bias current of 10pA; fast response time of 180ns; very
low power dissipation of 175
A per comparator; and single (+5V) or dual
(
5V) power supply operation.
The input voltage range includes ground, which makes these compara-
tors ideal for single supply low level signal detection with high source
impedance. The outputs can source and sink current allowing for
application flexibility. They can be used in either wired-OR connection
without pull-up resistor or push-pull configuration. The ALD2302A/
ALD2302 can also be used in wired-OR connection with other open
drain circuits such as the ALD2301/ALD2303 voltage comparators.
The ALD2302A/ALD2302 voltage comparators are ideal for a great
variety of applications, especially in low level signal detection circuits
which require low standby power and high output current. For quad
packages, use the ALD4302 quad voltage comparator.
FEATURES
Guaranteed to drive 200
loads
Fanout of 30LS TTL loads
Low supply current of 175
A each comparator
Pinout of LM193 type industry standard
comparators
Extremely low input bias currents -- 10pA
Virtually eliminates source impedance effects
Low operating supply voltage of 4V to 12V
Single (+5V) and dual supply (
5V) operation
High speed for both large and small signals --
180ns for TTL inputs and 400ns for 20mV
overdrive
CMOS, NMOS and TTL compatible
Push-pull outputs-current sourcing/ sinking
High output sinking current -- 60mA
Low supply current spikes
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
ALD2302A DA
ALD2302A SA
ALD2302A PA
ALD2302 DA
ALD2302 SA
ALD2302 PA
ORDERING INFORMATION
* Contact factory for industrial temperature range
PIN CONFIGURATION
1
2
3
4
8
7
6
5
OUT
1
-IN
1
+IN
1
GND
V
+
OUT
2
-IN
2
+IN
2
TOP VIEW
DA, PA, SA PACKAGE
BLOCK DIAGRAM
(1) OUT
1
(7) OUT
2
(4) GND
V
+
NONINVERTING INPUT
+IN
1
(3)
INVERTING INPUT
-IN
2
(6)
NONINVERTING INPUT
+IN
2
(5)
INVERTING INPUT
-IN
1
(2)
(8) V
+
1998 Advanced Linear Devices, Inc. 415 Tasman Drive, Sunnyvale, California 94089 -1706 Tel: (408) 747-1155 Fax: (408) 747-1286 http://www.aldinc.com
ALD2302A/ALD2302
Advanced Linear Devices
2
Notes:
1
Consists of junction leakage currents
2
Sample tested parameters
Voltage
V
S
2
6
2
6
V
Dual Supply
Supply
V
+
4
12
4
12
V
Single Supply
Supply
I
S
350
500
350
500
A
R
LOAD
=
Current
Voltage
A
VD
10
100
10
100
V/mV
R
LOAD
15K
Gain
Input Offset
V
OS
0.5
1.0
1.5
4.0
mV
R
LOAD
=1.5K
Voltage
2.0
5.0
0
C
T
A
70
C
Input Offset
I
OS
10
200
10
200
pA
0
C
T
A
70
C
Current
1
800
800
Input Bias
I
B
10
200
10
200
pA
0
C
T
A
70
C
Current
1
1000
1000
Common
Mode Input
V
ICR
-0.3
V
+
-1.5
-0.3
V
+
-1.5
V
Voltage
Range
2
Low Level
I
SINK
=12mA
Output
V
OL
0.18
0.4
0.18
0.4
V
V
INPUT
=1V
Voltage
Differential
Low Level
Output
I
OL
24
60
24
60
mA
V
OL
=1.0V
Current
High Level
Output
V
OH
3.5
4.5
3.5
4.5
V
I
OH
= -2mA
Voltage
Response
C
L
=15pF
Time
2
t
RP
400
400
ns
100mV Input
Step/20mV
Overdrive
C
L
= 15pF
180
180
ns
TTL- Level Input
Step
OPERATING ELECTRICAL CHARACTERISTICS
T
A
= 25
C V
+
= +5V unless otherwise specified
2302A
2302
Test
Parameter
Symbol
Min
Typ
Max
Min
Typ
Max
Unit
Conditions
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
ALD2302A/ALD2302
Advanced Linear Devices
3
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
TIM E (
s)
0.0
0.1
0.2
0.4
0.3
0.6
0.5
0.7
RESPONSE TIME FOR VARIOUS
INPUT OVERDRIVES
+2.5
0
100
0.0
-2.5
INPUT
VOLTAGE (mV)
OUTPUT
VOLTAGE (V)
10mV
20mV
50mV
T
A
= 25
C
V
S
=
2.5V
TTL
0V
V
IN
V+
V-
V
OUT
+
-
TRANSFER FUNCTION
DIFFERENTIAL INPUT VOLTAGE (mV)
+6.0
-6.0
0.0
OUTPUT VOLTAGE (V)
+2.5
0.0
-2.5
T
A
= 25
C
V
S
=
6V
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
=
2.5 V
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
TIM E (
s)
0.0
0.1
0.2
0.4
0.3
0.6
0.5
0.7
RESPONSE TIME FOR VARIOUS
INPUT OVERDRIVES
+2.5
100
0
0.0
-2.5
INPUT
VOLTAGE (mV)
OUTPUT
VOLTAGE (V)
TTL
50mV
20mV
10mV
T
A
= 25
C
V
S
=
2.5V
0V
V
IN
V+
V-
V
OUT
+
-
ALD2302A/ALD2302
Advanced Linear Devices
4
TYPICAL PERFORMANCE CHARACTERISTICS
400
300
200
100
500
6.0
8.0
10.0
12.0
4.0
2.0
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (
A)
V+
T
A
= 25
C
R
L
=
-
+
TOTAL SUPPLY CURRENT vs.
TOTAL SUPPLY VOLTAGE
350
300
250
200
400
0
25
50
75
-25
-55
TEMPERATURE (
C)
SUPPLY CURRENT (
A)
100
450
500
550
125
V
S
=
2.5V
No Load
All comparators
SUPPLY CURRENT vs. TEMPERATURE
6
8
10
12
4
2
SUPPLY VOLTAGE (V)
OUTPUT LOW VOLTAGE
vs. SUPPLY VOLTAGE
OUTPUT LOW VOLTAGE (V)
T
A
= 25
C
I
OL
= 12mA
0.0
0.2
0.4
0.5
0.6
0.1
0.3
NORMALIZED INPUT OFFSET VOLTAGE
vs. TEMPERATURE
TEMPERATURE (
C)
+3
+2
+1
0
-1
-2
-3
-55
-25
0
25
50
125
100
75
NORMALIZED INPUT OFFSET
VOLTAGE (mV)
V
CM
= 0V
V
S
=
2.5V
0
-2
-4
-6
2
6
8
10
12
4
2
SUPPLY VOLTAGE (V)
6
4
INPUT OFFSET VOLTAGE vs. SUPPLY
VOLTAGE REPRESENTATIVE SAMPLES
INPUT OFFSET VOLTAGE (mV)
T
A
= 25
C
6
8
10
12
4
2
SUPPLY VOLTAGE (V)
OUTPUT HIGH VOLTAGE
vs. SUPPLY VOLTAGE
OUTPUT HIGH VOLTAGE FROM V
+
(V)
T
A
= 25
C
I
OH
= -2mA
V
+
-0.6
V
+
-0.1
V
+
-0.2
V
+
-0.3
V
+
-0.4
V
+
-0.5
V
+
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