A
DVANCED
L
INEAR
D
EVICES,
I
NC.
ALD2302A/ALD2302
DUAL PRECISION CMOS VOLTAGE COMPARATOR WITH PUSH-PULL DRIVER
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
Ω;
low input bias current of 10pA; fast response time of 180ns; very
low power dissipation of 175µA 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.
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
FEATURES
•
•
•
•
•
•
•
•
•
Guaranteed to drive 200Ω loads
Fanout of 30LS TTL loads
Low supply current of 175µA 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
•
•
•
•
PIN CONFIGURATION
OUT
1
-IN
1
+IN
1
GND
1
2
3
4
TOP VIEW
DA, PA, SA PACKAGE
8
7
6
5
V
+
OUT
2
-IN
2
+IN
2
BLOCK DIAGRAM
ORDERING INFORMATION
("L" suffix for lead free version)
Operating Temperature Range *
-55°C to +125°C
0°C to +70°C
0°C to +70°C
8-Pin
CERDIP
Package
ALD2302ADA
ALD2302DA
8-Pin
Small Outline
Package (SOIC)
ALD2302ASA
ALD2302ASAL
ALD2302SA
ALD2302SAL
8-Pin
Plastic Dip
Package
ALD2302APA
ALD2302APAL
ALD2302PA
ALD2302PAL
(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
* Contact factory for industrial temperature range
©2007 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
2302A
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
Output
Voltage
Response
Time
2
Symbol
V
S
V
+
I
S
Min
±2
4
350
Typ
Max
±6
12
500
Min
±2
4
350
2302
Typ
Max
±6
12
500
Unit
V
V
µA
Test
Conditions
Dual Supply
Single Supply
R
LOAD
=
∞
R
LOAD
≥15KΩ
A
VD
10
100
10
100
V/mV
V
OS
1.0
2.0
3.0
5.0
mV
R
LOAD
=1.5KΩ
0°C
≤
T
A
≤
70°C
I
OS
10
200
800
200
1000
10
200
800
200
1000
pA
I
B
10
10
pA
0°C
≤
T
A
≤
70°C
V
ICR
-0.3
V
+ -1.5
-0.3
V
+ -1.5
V
0°C
≤
T
A
≤
70°C
V
OL
0.18
0.4
0.18
0.4
V
I
SINK
=12mA
V
INPUT
=1V
Differential
I
OL
24
60
24
60
mA
V
OL
=1.0V
V
OH
3.5
4.5
3.5
4.5
V
I
OH
= -2mA
t
RP
400
400
ns
C
L
=15pF
100mV Input
Step/20mV
Overdrive
C
L
= 15pF
TTL- Level Input
Step
180
180
ns
Notes:
1
2
Consists of junction leakage currents
Sample tested parameters
ALD2302A/ALD2302
Advanced Linear Devices
2
TYPICAL PERFORMANCE CHARACTERISTICS
SATURATION VOL
TAGE
vs. TEMPERATURE
1.4
TRANSFER FUNCTION
SATURATION VOLTAGE (V)
1.0
0.8
0.6
0.4
0.2
0
-55
-25
0
25
50
75
100
125
OUTPUT VOLTAGE (V)
1.2
V
S
=
±
2.5V
I
SINK
= 50mA
+6.0
T
A
= 25°C
V
S
=
±6V
0.0
-6.0
-2.5
0.0
DIFFERENTIAL INPUT VOLTAGE (mV)
+2.5
TEM PERATURE (°C)
COMMON - MODE VOLTAGE LIMITS (V)
COMMON - MODE VOLTAGE REFERRED
TO SUPPL VOLTAGE
Y
INPUT
VOLTAGE (mV)
0.5
V+
-0.5
-1.0
0.5
V-
-0.5
-55
-25
0
25
50
75
100
125
V
S
=
±
2.5 V
RESPONSE TIME FOR VARIOUS
INPUT OVERDRIVES
0
V
IN
V+
100
≈
0V
+
-
V-
V
OUT
T
A
= 25°C
V
S
=
±2.5V
≈
OUTPUT
VOLTAGE (V)
≈
≈
+2.5
TTL
20mV
50mV
0.0
-2.5
0.0
10mV
0.1
0.2
0.3
0.4
0.5
0.6
0.7
TEMPERATURE (°C)
TIM E (µs)
SATURATION VOL
TAGE vs.
SINK CURRENT
INPUT
VOLTAGE (mV)
1.5
RESPONSE TIME FOR VARIOUS
INPUT OVERDRIVES
100
0
V
IN
V+
OUTPUT SATURATION
VOLTAGE (V)
V
S
=
±2.5V
1.2
0.9
125°C
0.6
0.3
0.0
0
15
30
45
60
75
85°C
25°C
-25°C
-55°C
T
A
= 25°C
V
S
=
±2.5V
≈
+
-
0V
V-
V
OUT
≈
+2.5
OUTPUT
VOLTAGE (V)
TTL
0.0
-2.5
0.0
0.1
0.2
0.3
0.4
10mV
20mV
50mV
0.5
0.6
0.7
OUTPUT SINK CURRENT (mA)
TIM E (µs)
ALD2302A/ALD2302
Advanced Linear Devices
3
TYPICAL PERFORMANCE CHARACTERISTICS
TOTAL SUPPLY CURRENT vs.
TOTAL SUPPLY VOLTAGE
550
SUPPLY CURRENT vs. TEMPERATURE
V+
SUPPLY CURRENT (
µA)
SUPPLY CURRENT (µA)
500
400
300
200
100
2.0
-
+
T
A
= 25°C
R
L
=
∞
500
450
400
350
300
250
200
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)
NORMALIZED INPUT OFFSET VOLTAGE
vs. TEMPERATURE
NORMALIZED INPUT OFFSET
VOLTAGE (mV)
V
CM
= 0V
V
S
=
±2.5V
INPUT OFFSET VOLTAGE (mV)
INPUT OFFSET VOLTAGE vs. SUPPLY
VOLTAGE REPRESENTATIVE SAMPLES
6
4
2
0
-2
-4
-6
T
A
= 25°C
+3
+2
+1
0
-1
-2
-3
-55
-25
0
25
50
75
100
125
2
4
TEMPERATURE (°C)
8
SUPPLY VOLTAGE (V)
6
10
12
OUTPUT HIGH VOLTAGE
vs. SUPPLY VOLTAGE
OUTPUT HIGH VOLTAGE FROM V
+
(V)
V
+
-0.6
V
+
-0.5
V
+
-0.4
V
+
-0.3
V
+
-0.2
OUTPUT LOW VOLTAGE
vs. SUPPLY VOLTAGE
0.6
T
A
= 25°C
I
OH
= -2mA
OUTPUT LOW VOLTAGE (V)
0.5
0.4
0.3
0.2
0.1
0.0
T
A
= 25°C
I
OL
= 12mA
V
+
-0.1
V
+
2
4
8
SUPPLY VOLTAGE (V)
6
10
12
2
4
8
SUPPLY VOLTAGE (V)
6
10
12
ALD2302A/ALD2302
Advanced Linear Devices
4
TYPICAL APPLICATIONS
ZERO CROSSING DETECTOR
DOUBLE DUAL LIMIT WINDOW COMPARATOR
+3V
ALD2302
+12V
50K
V
IN
V
OUT
+12V
VH
2
+12V
+
-5V
1/2 ALD2302
50K
+
VH
1
+
+12V
MULTIPLE RELAY DRIVE
47K
V
IN
+12V
+5V
V
REF
V
IN
+5V
+
VL
1
+
+
1/2 ALD2302
50K
VL
2
ALD2302
VOLTAGE LEVEL TRANSLATOR
VL
1
and VH
1
first limit window send warning
VL
2
and VH
2
second limit window execute
system cutoff
V+ = +10V
V
REF
V
OUT
V
IN
+
1/2 ALD2302
V
REF
V
REF
= 1.4V for TTL input
=
V
+
2
for CMOS input
Output V
OUT
swings from rail-to-rail
ALD2302A/ALD2302
Advanced Linear Devices
5
