ADVANCED
LINEAR
DEVICES, INC.
ALD4303A/ALD4303
QUAD PRECISION MICROPOWER CMOS VOLTAGE COMPARATOR WITH DRIVER
GENERAL DESCRIPTION
FEATURES
• 3V, 5V and 12V supply
The ALD4303A/ALD4303 is a precision monolithic high performance
quad voltage comparator with open drain output built with advanced
silicon gate CMOS technology. It features very high typical input
impedance of 10 Ω; low input bias current of 10pA; very low power
dissipation of 7.5µA per comparator; micropower operation; high
output drive and single (+5V) or dual (±5V) power supply operation.
• Guaranteed to drive 200Ω loads
• Fanout of 30LS TTL loads
• Guaranteed maximum supply current of
22µA per comparator
12
• Industry standard pinout of LM393 type
• 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
• Compatible with push-pull outputs
• High output sinking current -- 60mA
• Low supply current spikes
• High gain -- 100V/mV
The input voltage range includes ground, making this comparator ideal
for single supply low level signal detection with high source impedance.
The ALD4303A/ALD4303 can be used in connection with other voltage
comparator circuits such as the ALD2301/ALD2302/ALD4302 voltage
comparators. The outputs can be connected to a higher external
+
voltage than V and used in a wired-OR connection with other open
drain circuits such as ALD2301/ALD2303. They can also be used with
push-pull output types such as ALD2302/ALD4302 voltage compara-
tors simultaneously with open drain comparators using a common V+.
The ALD4303A/ALD4303 is ideal for a great variety of voltage com-
parator applications, especially micropower detection circuits requiring
very low input currents, high output currents and low standby power.
PIN CONFIGURATION
02
01
1
2
14
13
03
APPLICATIONS
04
• 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
+
12
11
10
9
3
4
V
GND
-IN
+IN
-IN
+IN
-IN
1
1
2
2
4
5
6
7
+IN
-IN
4
3
• Oscillators
+IN
8
3
• Battery operated instruments
• Remote signal detection
• Multiple relay drivers
DB, PB, SB PACKAGE
BLOCK DIAGRAM
BENEFITS
+
V
(3)
• Extremely low power and high precision combination
• Built-in high input impedance buffer
• Built-in output driver with up to 60mA sink current
INVERTING INPUT
-
- IN (4)
1
(2) OUT
(1) OUT
1
NONINVERTING INPUT
+
+IN (5)
1
ORDERING INFORMATION
Operating Temperature Range *
INVERTING INPUT
-
- IN (6)
2
2
NONINVERTING INPUT
+
-55°C to +125°C
0°C to +70°C
0°C to +70°C
+ IN (7)
2
INVERTING INPUT
-
14-Pin
CERDIP
Package
14-Pin
Small Outline
Package (SOIC)
14-Pin
Plastic Dip
Package
- IN (8)
3
(14) OUT
(13) OUT
3
4
NONINVERTING INPUT
+
+ IN (9)
3
-
INVERTING INPUT
ALD4303ADB
ALD4303DB
ALD4303ASB
ALD4303SB
ALD4303APB
ALD4303PB
- IN (10)
4
NONINVERTING INPUT
+
+ IN (11)
4
* Contact factory for industrial temperature range
(12)
© 2005 Advanced Linear Devices, Inc. 415Tasman Drive, Sunnyvale, California 94089 -1706 Tel:(408) 747-1155 Fax:(408) 747-1286 http://www.aldinc.com
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