380 MHz, 25 mA,
a
Triple 2:1 Multiplexers
AD8183/AD8185*
FEATURES
FUNCTIONAL BLOCK DIAGRAM
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 (RL = 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
AD8183/AD8185
IN0A
DGND
IN1A
1
2
24
23
22
V
CC
OE
SELECT
3
SEL A/B
DISABLE
GND
21 V
CC
4
20
19
IN2A
OUT0
5
0
1
2
V
V
6
CC
EE
V
18 OUT1
7
EE
17
V
8
IN2B
GND
IN1B
GND
CC
16
9
OUT2
10
15
V
EE
14 DVCC
13
11
12
Low Channel-to-Channel Crosstalk –56 dB @ 100 MHz
High “OFF” Isolation of –100 dB @ 10 MHz
Low Cost
IN0B
V
CC
Fast High Impedance Output Disable Feature for
Connecting Multiple Devices
APPLICATIONS
Table I. Truth Table
Pixel Switching for “Picture-In-Picture”
Switching RGB in LCD and Plasma Displays
RGB Video Switchers and Routers
SEL A/B
OE
OUT
0
1
0
1
0
0
1
1
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.
V
R
= 1.4V STEP
= 150⍀
O
1.4V
1.2V
1.0V
0.8V
0.6V
0.4V
0.2V
0.0V
L
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.
200mV
2ns
Figure 1. AD8185 Pulse Response; RL = 150 Ω
*Patents pending.
REV. 0
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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.
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© Analog Devices, Inc., 1999