A
DVANCED
L
INEAR
D
EVICES,
I
NC.
ALD2303A/ALD2303
DUAL PRECISION MICROPOWER CMOS VOLTAGE COMPARATOR WITH DRIVER
GENERAL DESCRIPTION
The ALD2303A/ALD2303 is a precision monolithic high performance
dual voltage comparator built with advanced silicon gate CMOS tech-
nology. It features very high typical input impedance of 10
12
Ω;
low
input bias current of 10pA; very low power dissipation of 7.5µA per
comparator; and single (+5V) or dual (±5V) power supply operation.
The input voltage range includes ground, making this comparator ideal
for single supply low level signal detection with high source impedance.
The ALD2303A/ALD2303 can be used in connection with other voltage
comparator circuits such as the ALD2301/ALD2302/ALD4302 voltage
comparators. The output can be connected to a higher external voltage
than V
+.
The ALD2303A/ALD2303 is ideal for high precision micropower voltage
comparator applications, especially low level signal detection circuits
requiring low standby power, yet retaining high output current
capability.
APPLICATIONS
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Sensor detection circuits
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
FEATURES
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3V, 5V and 12V supply
Guaranteed to drive 200Ω loads
Fanout of 30LS TTL loads
Guaranteed maximum supply current of
20µA for each comparator
Pinout of LM193 type industry standard
comparators
Extremely low input bias currents -- 10pA
Virtually eliminates source impedance
effects
Single (+5V) and dual supply (±5V)
operation
CMOS, NMOS and TTL compatible
Open drain wired-OR outputs
High output sinking current -- 60mA
Low supply current spikes
High gain -- 100V/mV
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
BENEFITS
• Extremely low power and high precision combination
• Built-in high input impedance buffer
• Built-in output driver with up to 60mA sink current
ORDERING INFORMATION
Operating Temperature Range *
-55°C to +125°C
0°C to +70°C
0°C to +70°C
8-Pin
CERDIP
Package
ALD2303A DA
ALD2303 DA
Q8-Pin
Small Outline
Package (SOIC)
ALD2303A SA
ALD2303 SA
8-Pin
Plastic Dip
Package
ALD2303A PA
ALD2303 PA
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
BLOCK DIAGRAM
(8) V
+
* 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
ALD [ ADVANCED LINEAR DEVICES ]
