CMOS, 3 ⍀ Low Voltage
a
4-/8-Channel Multiplexers
ADG708/ADG709
FEATURES
FUNCTIONAL BLOCK DIAGRAMS
1.8 V to 5.5 V Single Supply
؎3 V Dual Supply
ADG708
ADG709
3 ⍀ On-Resistance
S1
S1A
S4A
0.75 ⍀ On-Resistance Flatness
100 pA Leakage Currents
14 ns Switching Times
Single 8-to-1 Multiplexer ADG708
Differential 4-to-1 Multiplexer ADG709
16-Lead TSSOP Package
Low Power Consumption
TTL/CMOS-Compatible Inputs
DA
DB
D
S1B
S4B
S8
1 OF 4
1 OF 8
DECODER
DECODER
APPLICATIONS
Data Acquisition Systems
Communication Systems
Relay Replacement
A2 EN
EN
A1
A0 A1
A0
Audio and Video Switching
Battery-Powered Systems
GENERAL DESCRIPTION
PRODUCT HIGHLIGHTS
The ADG708 and ADG709 are low voltage, CMOS analog
multiplexers comprising eight single channels and four differential
channels respectively. The ADG708 switches one of eight inputs
(S1–S8) to a common output, D, as determined by the 3-bit
binary address lines A0, A1, and A2. The ADG709 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.
1. Single/Dual Supply Operation. The ADG708 and ADG709
are fully specified and guaranteed with 3 V and 5 V single
supply and ±3 V dual supply rails.
2. Low RON (3 Ω Typical).
3. Low Power Consumption (<0.01 µW).
4. Guaranteed Break-Before-Make Switching Action.
5. Small 16-Lead TSSOP Package.
Low power consumption and operating supply range of 1.8 V to
5.5 V make the ADG708 and ADG709 ideal for battery-powered,
portable instruments. All channels exhibit break-before-make
switching action preventing momentary shorting when switch-
ing channels.
These switches are designed on an enhanced submicron process
that provides low power dissipation yet gives high switching
speed, very low on-resistance and leakage currents. On-resistance
is in the region of a few ohms and is closely matched between
switches and very flat over the full signal range. These parts can
operate equally well as either Multiplexers or Demultiplexers,
and have an input signal range that extends to the supplies.
The ADG708 and ADG709 are available in a 16-lead TSSOP
package.
REV. 0
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© Analog Devices, Inc., 2000