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

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 1012Ω; 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.

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

03

04

GND

02

01

1

14

2

3

13

12

11

10

9

8

4

5

6

7

SBL, PBL, DB PACKAGES