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a
ADG784
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700 www.analog.com
Fax: © Analog Devices, Inc.,
CMOS 3 V/5 V, Wide Bandwidth Quad 2:1
Mux in Chip Scale Package
FUNCTIONAL BLOCK DIAGRAM
ADG784
S1A
S1B
D1
S2A
S2B
S3B
S3A
S4A
S4B
D2
D3
D4
IN
EN
1-OF-2
DECODER
FEATURES
Low Insertion Loss and On Resistance: 4 Typical
On-Resistance Flatness <2
Bandwidth >200 MHz
Single 3 V/5 V Supply Operation
Rail-to-Rail Operation
Very Low Distortion: <1%
Low Quiescent Supply Current (100 nA Typical)
Fast Switching Times
t
ON
10 ns
t
OFF
4 ns
TTL/CMOS Compatible
For Functionally Equivalent Devices in 16-Lead QSOP/
SOIC Packages, See ADG774
APPLICATIONS
100VG-AnyLAN
Token Ring 4 Mbps/16 Mbps
ATM25/155
NIC Adapter and Hubs
Audio and Video Switching
Relay Replacement
GENERAL DESCRIPTION
The ADG784 is a monolithic CMOS device comprising four
2:1 multiplexer/demultiplexers with high impedance outputs.
The CMOS process provides low power dissipation yet gives
high switching speed and low on resistance. The on-resistance
variation is typically less than 0.5 Ω with an input signal ranging
from 0 V to 5 V.
The bandwidth of the ADG784 is greater than 200 MHz and
this, coupled with low distortion (typically 0.5%), makes the
part suitable for switching fast ethernet signals.
The on-resistance profile is very flat over the full analog input
range ensuring excellent linearity and low distortion when switch-
ing audio signals. Fast switching speed, coupled with high signal
bandwidth, also makes the parts suitable for video signal switch-
ing. CMOS construction ensures ultralow power dissipation
making the parts ideally suited for portable and battery powered
instruments.
The ADG784 operates from a single 3.3 V/5 V supply and is
TTL logic compatible. The control logic for each switch is shown
in the Truth Table.
These switches conduct equally well in both directions when
ON, and have an input signal range that extends to the sup-
plies. In the OFF condition, signal levels up to the supplies
are blocked. The ADG784 switches exhibit break-before-
make switching action.
PRODUCT HIGHLIGHTS
1. Also Available as ADG774 in 16-Lead QSOP and SOIC.
2. Wide Bandwidth Data Rates >200 MHz.
3. Ultralow Power Dissipation.
4. Extended Signal Range.
The ADG784 is fabricated on a CMOS process giving an
increased signal range that fully extends to the supply rails.
5. Low Leakage over Temperature.
6. Break-Before-Make Switching.
This prevents channel shorting when the switches are config-
ured as a multiplexer.
7. Crosstalk is typically –70 dB @ 30 MHz.
8. Off isolation is typically –60 dB @ 10 MHz.
9. Available in Chip Scale Package (CSP).
REV. A
2013
781/461-3113
