a
REV. B
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
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 disabled, all channels are switched OFF.
The ADG408/ADG409 are designed on an enhanced LC
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.
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 that
may result from its use. No license is granted by implication or otherwise
under any patent or patent rights of Analog Devices. Trademarks and
registered trademarks are the property of their respective companies.
FEATURES
44 V Supply Maximum Ratings
V
Low On Resistance (100
Low Power (I
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
SS
to V
DD
Analog Signal Range
SUPPLY
< 75 A)
max)
High Performance Analog Multiplexers
2
MOS
PRODUCT HIGHLIGHTS
1. Extended Signal Range.
2. Low Power Dissipation.
3 Low R
4. Single-Supply Operation.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
Fax: 781/326-8703
The ADG408/ADG409 are fabricated on an enhanced
LC
extends to the supply rails.
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.
S1
S8
2
MOS process, giving an increased signal range that
ON
.
FUNCTIONAL BLOCK DIAGRAMS
A0 A1 A2 EN
ADG408
DECODER
1-OF-8
© 2003 Analog Devices, Inc. All rights reserved.
LC
2
ADG408/ADG409
MOS 4-/8-Channel
D
S1A
S4A
S1B
S4B
A0
DECODER
ADG409
1-OF-4
A1
EN
www.analog.com
DA
DB