A
DVANCED
L
INEAR
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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
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