High Performance Analog Multiplexers

ADG408/ADG409

Rev. C

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FEATURES

44 V supply maximum ratings

Low on resistance (100 Ω maximum)

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

FUNCTIONAL BLOCK DIAGRAMS

ADG408

S1

S8

D

ADG409

S1A

S4B

DA

DB

S4A

S1B

1-OF-4

DECODER

1-OF-8

DECODER

A0 A1

EN

A0 A1 A2 EN

Figure 1.

GENERAL DESCRIPTION

The ADG408/ADG409 are monolithic CMOS analog multiplexers

comprising eight single channels and four differential 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 determined 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 the device is disabled,

all channels are switched off.

process that 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

increased signal range that extends to the supply rails.

2.

Low Power Dissipation.

3.

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 remain

functional with single supplies as low as 5 V.