REV. A

Information furnished by Analog Devices is believed to be accurate and

reliable. However, no responsibility is assumed by Analog Devices for its

use, nor for any infringements of patents or other rights of third parties

which may result from its use. No license is granted by implication or

otherwise under any patent or patent rights of Analog Devices.

a

High Performance Analog Multiplexers

ADG408/ADG409

FEATURES

44 V Supply Maximum Ratings

Low On Resistance (100

max)

A)

Fast Switching

Break-Before-Make Switching Action

Plug-in Replacement for DG408/DG409

APPLICATIONS

Audio and Video Routing

Automatic Test Equipment

Data Acquisition Systems

Battery Powered Systems

Sample and Hold Systems

Communication Systems

GENERAL DESCRIPTION

The ADG408 and ADG409 are monolithic CMOS analog

multiplexers comprising eight single channels and four differen-

tial channels respectively. The ADG408 switches one of eight

inputs to a common output as determined by the 3-bit binary

address lines A0, A1 and A2. The ADG409 switches one of four

differential inputs to a common differential output as deter-

mined by the 2-bit binary address lines A0 and A1. An EN

input on both devices is used to enable or disable the device.

When disabled, all channels are switched OFF.

The ADG408/ADG409 are designed on an enhanced LC

process which provides low power dissipation yet gives high

switching speed and low on resistance. Each channel 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 channels exhibit break-

before-make switching action, preventing momentary shorting

when switching channels. Inherent in the design is low charge

injection for minimum transients when switching the digital

inputs.

The ADG408/ADG409 are improved replacements for the

DG408/DG409 Analog Multiplexers.

PRODUCT HIGHLIGHTS

1. Extended Signal Range

The ADG408/ADG409 are fabricated on an enhanced

LC

extends to the supply rails.

2. Low Power Dissipation

4. Single Supply Operation

For applications where the analog signal is unipolar, the

ADG408/ADG409 can be operated from a single rail power

supply. The parts are fully specified with a single +12 V

power supply and will remain functional with single supplies

as low as +5 V.

FUNCTIONAL BLOCK DIAGRAMS

ADG408

1 OF 8

DECODER

S1

S8

D

A0 A1 A2 EN

ADG409

1 OF 4

DECODER

S1A

S4B

DA

A0

A1

EN

DB

S4A

S1B

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