A
DVANCED
L
INEAR
D
EVICES,
I
NC.
ALD4303A/ALD4303
QUAD PRECISION MICROPOWER CMOS VOLTAGE COMPARATOR WITH DRIVER
GENERAL DESCRIPTION
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
12
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.
FEATURES
•
•
•
•
•
•
•
3V, 5V and 12V supply
Guaranteed to drive 200Ω loads
Fanout of 30LS TTL loads
Guaranteed maximum supply current of
22µA per comparator
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-
PIN CONFIGURATION
parator applications, especially micropower detection circuits requiring
very low input currents, high output currents and low standby power.
02
1
APPLICATIONS
•
•
•
•
•
•
•
•
•
•
•
•
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
01
V
+
-IN
1
+IN
1
-IN
2
+IN
2
2
14
03
04
GND
+IN
4
-IN
4
+IN
3
-IN
3
13
3
4
12
11
5
10
6
9
7
8
DB, PB, SB PACKAGE
BLOCK DIAGRAM
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
14-Pin
CERDIP
Package
ALD4303ADB
ALD4303DB
14-Pin
Small Outline
Package (SOIC)
ALD4303ASB
ALD4303SB
14-Pin
Plastic Dip
Package
ALD4303APB
ALD4303PB
INVERTING INPUT
- IN
1
(4)
NONINVERTING INPUT
+ IN
1
(5)
INVERTING INPUT
- IN
2
(6)
NONINVERTING INPUT
+ IN
2
(7)
INVERTING INPUT
- IN
3
(8)
NONINVERTING INPUT
+ IN
3
(9)
INVERTING INPUT
- IN
4
(10)
NONINVERTING INPUT
+ IN
4
(11)
V
+
(3)
-
(2) OUT
1
+
-
(1) OUT
2
+
-
(14) OUT
3
+
-
(13) OUT
4
+
* Contact factory for industrial temperature range
(12)
© 2005 Advanced Linear Devices, Inc. 415 Tasman Drive, Sunnyvale, California 94089 -1706 Tel: (408) 747-1155 Fax: (408) 747-1286 http://www.aldinc.com
Microcontroller MCU
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