Rev 2.0 ©2010 Advanced Linear Devices, Inc. 415 Tasman Drive, Sunnyvale, CA 94089-1706 Tel: (408) 747-1155 Fax: (408) 747-1286
www.aldinc.com
QUAD PRECISION MICROPOWER CMOS VOLTAGE COMPARATOR WITH DRIVER
ALD4303A/ALD4303
ADVANCED
LINEAR
DEVICES, INC.
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
FEATURES
• 3V, 5V and 10V 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 -- typically 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 -- typically 60mA
• Low supply current spikes
• High gain -- 100V/mV
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.
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,
and 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 the ALD2301 and ALD2303.
They can also be used with push-pull output types such as the
ALD2302 and ALD4302 voltage comparators simultaneously with
open drain comparators using a common V+. The ALD4303A/ALD4303
is ideal for a great variety of voltage comparator applications, espe-
cially micropower detection circuits requiring very low input currents,
high output currents and low standby power.
Operating Temperature Range *
0°C to +70°C0°C to +70°C -55°C to +125°C
14-Pin 14-Pin 14-Pin
Small Outline Plastic Dip CERDIP
Package (SOIC) Package Package
ALD4303ASBL ALD4303APBL ALD4303ADB
ALD4303SBL ALD4303PBL ALD4303DB
* Contact factory for leaded (non-RoHS) or high temperature versions.
ORDERING INFORMATION (“L” suffix for lead free version)
BLOCK DIAGRAM
V
+
(3)
INVERTING INPUT
- IN
1
(4)
NONINVERTING INPUT
+IN
1
(5)
NONINVERTING INPUT
+ IN
2
(7)
INVERTING INPUT
- IN
2
(6)
NONINVERTING INPUT
+ IN
3
(9)
INVERTING INPUT
- IN
3
(8)
INVERTING INPUT
- IN
4
(10)
(12)
NONINVERTING INPUT
+ IN
4
(11)
-
+
-
+
-
+
-
+
(2) OUT
1
(1) OUT
2
(14) OUT
3
(13) OUT
4
PIN CONFIGURATION
+IN
1
-IN
2
+IN
2
03
04
GND
-IN
4
+IN
3
-IN
3
02
01
-IN
1
+IN
4
1
14
V
+
2
3
13
12
11
10
9
8
4
5
6
7
SBL, PBL, DB PACKAGES
