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a

ADG661/ADG662/ADG663

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 781/329-4700

World Wide Web Site: http://www.analog.com

Fax: 781/326-8703

© Analog Devices, Inc., 1998

Precision 5 V Quad SPST Switches

FUNCTIONAL BLOCK DIAGRAM

FEATURES

+5 V,

5 V Power Supplies

Ultralow Power Dissipation (<0.5

W)

Low Leakage (<100 pA)

Low On Resistance (<50

)

Fast Switching Times

Low Charge Injection

TTL/CMOS Compatible

TSSOP Package

APPLICATIONS

Battery Powered Instruments

Single Supply Systems

Remote Powered Equipment

+5 V Supply Systems

Computer Peripherals such as Disk Drives

Precision Instrumentation

Audio and Video Switching

Automatic Test Equipment

Precision Data Acquisition

Sample Hold Systems

Communication Systems

Each switch conducts equally well in both directions when ON

and has an input signal range that extends to the supplies. In the

OFF condition, signal levels up to the supplies are blocked. All

switches exhibit break-before-make switching action for use in

multiplexer applications. Inherent in the design is low charge

injection for minimum transients when switching the digital

inputs.

PRODUCT HIGHLIGHTS

1. +5 V Single Supply Operation

The ADG661, ADG662 and ADG663 offer high perfor-

mance, including low on resistance and wide signal range,

fully specified and guaranteed with

±5 V and +5 V supply

rails.

2. Ultralow Power Dissipation

CMOS construction ensures ultralow power dissipation.

4. Break-Before-Make Switching

This prevents channel shorting when the switches are config-

ured as a multiplexer.

GENERAL DESCRIPTION

The ADG661, ADG662 and ADG663 are monolithic CMOS

devices comprising four independently selectable switches.

These switches feature low, well-controlled on resistance and

wide analog signal range, making them ideal for precision analog

signal switching.

They are fabricated using Analog Devices' advanced linear

low leakage currents, ultralow power dissipation and low capaci-

tance for fast switching speeds with minimum charge injection.

The on resistance profile is very flat over the full analog input

range ensuring excellent linearity and low distortion when

switching audio signals. Fast switching speed coupled with high

signal bandwidth also make the parts suitable for video signal

switching. CMOS construction ensures ultralow power dissipa-

tion making the parts ideally suited for portable and battery

powered instruments.

The ADG661, ADG662 and ADG663 contain four indepen-

dent SPST switches. The ADG661 and ADG662 differ only in

that the digital control logic is inverted. The ADG661 switches

are turned on with a logic low on the appropriate control input,

while a logic high is required for the ADG662. The ADG663

has two switches with digital control logic similar to that of the

ADG661, while the logic is inverted on the other two switches.

IN1

IN2

IN3

IN4

S1

D1

S2

D2

S3

D3

S4

D4

ADG661

IN1

IN2

IN3

IN4

S1

D1

S2

D2

S3

D3

S4

D4

ADG662

IN1

IN2

IN3

IN4

S1

D1

S2

D2

S3

D3

S4

D4

ADG663

SWITCHES SHOWN FOR A LOGIC "1" INPUT