REV. A
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a
3 V/5 V, 4/8 Channel High
Performance Analog Multiplexers
ADG608/ADG609
© Analog Devices, Inc., 1995
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 617/329-4700 Fax: 617/326-8703
GENERAL DESCRIPTION
The ADG608 and ADG609 are monolithic CMOS analog mul-
tiplexers comprising eight single channels and four differential
channels respectively, fully specified for ±5 V, +5 V and +3 V
power supplies. The ADG608 switches one of eight inputs to a
common output as determined by the 3-bit binary address lines
A0, A1 and A2. The ADG609 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 de-
vices is used to enable or disable the device. When disabled, all
channels are switched OFF. All the address and enable inputs
are TTL compatible over the full specified operating tempera-
ture range, making the parts suitable for bus-controlled systems
such as data acquisition systems, process controls, avionics and
ATEs since the TTL compatible address inputs simplify the digital
interface design and reduce the board space requirements.
The ADG608/ADG609 are designed on an enhanced LC
2
MOS
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 which extends to the supplies. In the OFF condition, sig-
nal 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 ability to operate from single +3 V, +5 V or ±5 V bipolar
supplies makes the ADG608 and ADG609 perfect for use in
battery operated instruments and with the new generation of
DACs and ADCs from Analog Devices. The use of 5 V sup-
plies and reduced operating currents gives much lower power
dissipation than devices operating from ±15 V supplies.
PRODUCT HIGHLIGHTS
1. Extended Signal Range
The ADG608/ADG609 are fabricated on an enhanced
LC
2
MOS process giving an increased signal range which
extends to the supplies.
2. Low Power Dissipation
3. Low R
ON
4. Fast Switching Times
5. Break-Before-Make Switching
Switches are guaranteed break-before-make so that input
signals are protected against momentary shorting.
6. Single/Dual Supply Operation
ORDERING GUIDE
Model Temperature Range Package Option*
ADG608BN –40°C to +85°C N-16
ADG608BR –40°C to +85°C R-16A
ADG608BRU –40°C to +85°C RU-16
ADG608TRU –55°C to +125°C RU-16
ADG609BN –40°C to +85°C N-16
ADG609BR –40°C to +85°C R-16A
ADG609BRU –40°C to +85°C RU-16
*N = Plastic DIP; RU = Thin Shrink Small Outline Package (TSSOP);
R = 0.15" Small Outline IC (SOIC).
FUNCTIONAL BLOCK DIAGRAMS
S1
S8
A0
D
A1 A2 EN
1 OF 8
DECODER
ADG608
S1A
A0
DA
A1
S4A
S1B
S4B
DB
EN
1 OF 4
DECODER
ADG609
FEATURES
+3 V, +5 V, 65 V Power Supplies
V
SS
to V
DD
Analog Signal Range
Low On Resistance (30 V max)
Fast Switching Times
t
ON
75 ns max
t
OFF
45 ns max
Low Power Dissipation (1.5 mW max)
Break-Before-Make Construction
ESD > 5000 V as per Military Standard 3015.7
TTL and CMOS Compatible Inputs
APPLICATIONS
Automatic Test Equipment
Data Acquisition Systems
Communication Systems
Avionics and Military Systems
Microprocessor Controlled Analog Systems
Medical Instrumentation
Battery Powered Instruments
Remote Powered Equipment
Compatible with 65 V DACs and ADCs such as
AD7840/8, AD7870/1/2/4/5/6/8
