a
FEATURES
Fully Buffered Inputs and Outputs
Fast Channel-to-Channel Switching: 15 ns
High Speed
380 MHz Bandwidth (–3 dB) 200 mV p-p
310 MHz Bandwidth (–3 dB) 2 V p-p
1000 V/ s Slew Rate G = +1, 2 V Step
1150 V/ s Slew Rate G = +2, 2 V Step
Fast Settling Time of 15 ns to 0.1%
Low Power: 25 mA
Excellent Video Specifications (R
L
= 150 )
Gain Flatness of 0.1 dB to 90 MHz
0.01% Differential Gain Error
0.02 Differential Phase Error
Low All-Hostile Crosstalk –84 dB @ 5 MHz
–54 dB @ 50 MHz
Low Channel-to-Channel Crosstalk –56 dB @ 100 MHz
High “OFF” Isolation of –100 dB @ 10 MHz
Low Cost
Fast High Impedance Output Disable Feature for
Connecting Multiple Devices
APPLICATIONS
Pixel Switching for “Picture-In-Picture”
Switching RGB in LCD and Plasma Displays
RGB Video Switchers and Routers
IN0A 1
DGND 2
IN1A 3
GND 4
IN2A 5
V
CC
6
V
EE
7
IN2B 8
GND 9
IN1B 10
GND 11
IN0B 12
380 MHz, 25 mA,
Triple 2:1 Multiplexers
AD8183/AD8185*
FUNCTIONAL BLOCK DIAGRAM
AD8183/AD8185
SELECT
24 V
CC
23
OE
22 SEL
A/B
DISABLE
0
21 V
CC
20 OUT0
19 V
EE
1
18 OUT1
17 V
CC
2
16 OUT2
15 V
EE
14 DVCC
13 V
CC
Table I. Truth Table
SEL
A/B
0
1
0
1
OE
0
0
1
1
OUT
INA
INB
High Z
High Z
PRODUCT DESCRIPTION
The AD8183 (G = +1) and AD8185 (G = +2) are high speed
triple 2:1 multiplexers. They offer –3 dB signal bandwidth up to
380 MHz, along with slew rate of 1000 V/µs. With better than
–90 dB of channel-to-channel crosstalk and isolation at 10 MHz,
they are useful in many high-speed applications. The differential
gain and differential phase errors of 0.01% and 0.02° respectively,
along with 0.1 dB flatness to 90 MHz make the AD8183 and
AD8185 ideal for professional video and RGB multiplexing. They
offer 15 ns channel-to-channel switching time, making them
an excellent choice for switching video signals, while consuming
less than 25 mA on
±
5 V supply voltages.
Both devices offer a high speed disable feature that can set the
output into a high impedance state. This allows the building of
larger input arrays while minimizing “OFF” channel output
loading. They operate on voltage supplies of
±
5 V and are offered
in a 24-lead TSSOP package.
V
O
= 1.4V STEP
1.4V R
L
= 150
1.2V
1.0V
0.8V
0.6V
0.4V
0.2V
0.0V
200mV
2ns
Figure 1. AD8185 Pulse Response; R
L
= 150
Ω
*Patents
pending.
REV. 0
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
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
World Wide Web Site: http://www.analog.com
Fax: 781/326-8703
© Analog Devices, Inc., 1999
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