A
DVANCED
L
INEAR
D
EVICES,
I
NC.
ALD2302A/ALD2302
DUAL PRECISION CMOS VOLTAGE COMPARATOR WITH PUSH-PULL DRIVER
GENERAL DESCRIPTION
The ALD2302A/ALD2302 are monolithic precision high performance
dual voltage comparators built with advanced silicon gate CMOS
technology. The primary features are: very high typical input impedance
of 10
12
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.
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 ALD4302A/ALD4302 quad voltage comparator.
APPLICATIONS
•
•
•
•
•
•
•
•
•
•
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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
• 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
-- typically 10pA
• Virtually eliminates source impedance effects
• Low operating supply voltage of 4V to 10V
• 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 -- typically 60mA
• Low supply current spikes
• High gain -- 100V/mV
PIN CONFIGURATION
OUT
1
-IN
1
+IN
1
GND
1
2
3
4
SAL, PAL, DA PACKAGES
8
7
6
5
V
+
OUT
2
-IN
2
+IN
2
BENEFITS
•
•
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•
On-chip input and output buffers
Precision voltage comparison capability
Eliminate need for second power supply
Eliminate pull-up resistor
BLOCK DIAGRAM
ORDERING INFORMATION
(“L” suffix for lead free version)
0°C to +70°C
8-Pin
Small Outline
Package (SOIC)
ALD2302ASAL
ALD2302SAL
Operating Temperature Range *
0°C to +70°C
-55°C to +125°C
8-Pin
Plastic Dip
Package
ALD2302APAL
ALD2302PAL
8-Pin
CERDIP
Package
ALD2302ADA
ALD2302DA
INVERTING INPUT
-IN
1
(2)
NONINVERTING INPUT
+IN
1
(3)
(8) V
+
(1) OUT
1
V
+
INVERTING INPUT
-IN
2
(6)
NONINVERTING INPUT
+IN
2
(5)
(4) GND
(7) OUT
2
* Contact factory for leaded (non-RoHS) or high temperature versions.
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
ALD [ ADVANCED LINEAR DEVICES ]
