A
L
D
DVANCED
INEAR
EVICES, INC.
ALD2302A/ALD2302
DUAL PRECISION CMOS VOLTAGE COMPARATOR WITH PUSH-PULL DRIVER
GENERAL DESCRIPTION
FEATURES
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 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.
• 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
12
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.
PIN CONFIGURATION
APPLICATIONS
• PCMCIA instruments
• MOSFET driver
• High source impedance voltage
comparison circuits
+
OUT
1
8
V
1
-IN
2
3
7
6
OUT
1
1
2
• 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
-IN
2
+IN
GND
4
+IN
5
2
TOP VIEW
DA, PA, SA PACKAGE
BENEFITS
• On-chip input and output buffers
• Precision voltage comparison capability
• Eliminate need for second power supply
• Eliminate pull-up resistor
BLOCK DIAGRAM
+
V
(8)
INVERTING INPUT
ORDERING INFORMATION
Operating Temperature Range *
-IN (2)
1
(1) OUT
1
2
NONINVERTING INPUT
+IN (3)
1
-55°C to +125°C
0°C to +70°C
0°C to +70°C
+
V
INVERTING INPUT
-IN (6)
8-Pin
8-Pin
8-Pin
2
(7) OUT
CERDIP
Package
Small Outline
Package (SOIC)
Plastic Dip
Package
NONINVERTING INPUT
+IN (5)
2
(4) GND
ALD2302A DA
ALD2302 DA
ALD2302A SA
ALD2302 SA
ALD2302A PA
ALD2302 PA
* Contact factory for industrial temperature range
© 1998 Advanced Linear Devices, Inc. 415Tasman Drive, Sunnyvale, California 94089 -1706 Tel: (408) 747-1155 Fax: (408) 747-1286 http://www.aldinc.com
ALD [ ADVANCED LINEAR DEVICES ]
