DUAL PRECISION CMOS VOLTAGE COMPARATOR WITH PUSH-PULL DRIVER

ALD2302A/ALD2302

APPLICATIONS

• 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

BENEFITS

• On-chip input and output buffers

• Precision voltage comparison capability

• Eliminate need for second power supply

• Eliminate pull-up resistor

GENERAL DESCRIPTION

The ALD2302A/ALD2302 are monolithic precision high performance

dual voltage comparators built with advanced silicon gate CMOS tech-

nology. The primary features are: very high typical input impedance of

Ω; low input bias current of 10pA; fast response time of 180ns; very

low power dissipation of 175

µA 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 ALD4302 quad voltage comparator.

FEATURES

• Guaranteed to drive 200

Ω loads

• Fanout of 30LS TTL loads

• Low supply current of 175

µA each comparator

• Pinout of LM193 type industry standard

comparators

• Extremely low input bias currents -- 10pA

• Virtually eliminates source impedance effects

• Low operating supply voltage of 4V to 12V

• 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 -- 60mA

• Low supply current spikes

Operating Temperature Range *

-55

°C to +125°C

0

°C to +70°C

0

°C to +70°C

8-Pin

8-Pin

8-Pin

CERDIP

Small Outline

Plastic Dip

Package

Package (SOIC)

Package

ALD2302A DA

ALD2302A SA

ALD2302A PA

ALD2302 DA

ALD2302 SA

ALD2302 PA

ORDERING INFORMATION

* Contact factory for industrial temperature range

PIN CONFIGURATION

1

2

3

4

8

7

6

5

GND

TOP VIEW

DA, PA, SA PACKAGE

BLOCK DIAGRAM

(4) GND

NONINVERTING INPUT

INVERTING INPUT

NONINVERTING INPUT

INVERTING INPUT

© 1998 Advanced Linear Devices, Inc. 415 Tasman Drive, Sunnyvale, California 94089 -1706 Tel: (408) 747-1155 Fax: (408) 747-1286 http://www.aldinc.com