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 CMOS VOLTAGE COMPARATOR WITH OPEN DRAIN DRIVER
ALD4301A/ALD4301
A
DVANCED
L
INEAR
D
EVICES,
I
NC.
GENERAL DESCRIPTION
The ALD4301A/ALD4301 is a monolithic high performance quad
voltage comparator built with advanced silicon gate CMOS technol-
ogy. It features very high typical input impedance of 10
12
Ω ; low input
bias current of 10pA; fast response time of 300ns; very low power
dissipation of 55µ A per comparator; high output drive and single
(+5V) or dual (±5V) power supply operation.
The input voltage range includes ground, making this comparator
ideal for low level signal detection with high source impedance. The
outputs are open-drain configuration, allowing maximum application
flexibility. 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 ALD4301A/ALD4301 is ideal for a great
variety of voltage comparator applications, especially detection cir-
cuits requiring very low input currents and low standby power, yet
retaining high output current capability.
FEATURES
• Fanout of 30LS TTL loads
• Low supply current of 55µA/comparator typical
• Pinout/Functional equivalent to LM393 types
• Extremely low input bias currents -- typically 10pA
• Virtually eliminates source impedance effects
• Low operating supply voltage of 3V to 10V
• Single (+5V) and dual supply (±5V) operation
• High speed for both large signal and low level
signals -- 300ns typical for TTL inputs
• CMOS, NMOS and TTL compatible
• Wired-OR open drain outputs
• High output sinking current -- typically 60mA
• Low supply current spikes
• High gain
APPLICATIONS
• High source impedance voltage
comparison circuits
• Dual/Quad limit window comparator
• Power supply voltage monitor
• Photo-detector sensor circuit
• Relay or LED driver
• Oscillators
• Battery operated instruments
• Remote signal detection
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
ALD4301ASBL ALD4301APBL ALD4301ADB
ALD4301SBL ALD4301PBL ALD4301DB
* Contact factory for leaded (non-RoHS) or high temperature versions.
ORDERING INFORMATION (“L” suffix for lead free version)
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
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
