REV. A
a
AD8186/AD8187
480 MHz Single-Supply (5 V)
Triple 2:1 Multiplexers
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FEATURES
Fully Buffered Inputs and Outputs
Fast Channel-to-Channel Switching: 4 ns
Single-Supply Operation (5 V)
High Speed:
480 MHz Bandwidth (–3 dB) 2 V p-p
>1600 V/s (G = +1)
>1500 V/s (G = +2)
Fast Settling Time of 7 ns to 0.1%
Low Current: 19 mA/20 mA
Excellent Video Specifications (R
L
= 150 )
0.05% Differential Gain Error
0.05 Differential Phase Error
Low Glitch
All Hostile Crosstalk
–84 dB @ 5 MHz
–52 dB @ 100 MHz
High Off Isolation of –95 dB @ 5 MHz
Low Cost
Fast, High Impedance Disable Feature for Connecting
Multiple Outputs
Logic-Shifted Outputs
APPLICATIONS
Switching RGB in LCD and Plasma Displays
RGB Video Switchers and Routers
FUNCTIONAL BLOCK DIAGRAM
IN0A
D
GND
V
REF
OUT 0
OUT 1
OUT 2
IN1A
IN2A
IN2B
IN1B
IN0B
V
CC
V
EE
V
EE
V
EE
V
CC
OE
SEL A/B
V
EE
V
CC
V
CC
V
CC
V
EE
DV
CC
LOGIC
24
23
22
21
20
19
18
17
16
15
14
13
1
2
3
4
5
6
7
8
9
10
11
12
AD8186/AD8187
0
1
2
SELECT
ENABLE
Table I. Truth Table
SEL A/B OE OUT
00High Z
10High Z
11IN A
01IN B
GENERAL DESCRIPTION
The AD8186 (G = +1) and AD8187 (G = +2) are high speed,
single-supply, triple 2-to-1 multiplexers. They offer –3 dB large signal
bandwidth of over 480 MHz along with a slew rate in excess of
1500 V/µs. With better than –80 dB of all hostile crosstalk and
–95 dB OFF isolation, they are suited for many high speed appli-
ca
tions. The differential gain and differential phase error of 0.05%
and 0.05°, along with 0.1 dB flatness to 85 MHz, make the
AD8186 and AD8187 ideal for professional and component video
multiplexing. They offer 4 ns switching time, making
them an
excellent choice for switching video signals while consuming less
than 20 mA on a single 5 V supply (100 mW
). Both devices have a
high speed disable feature that sets
the outputs into a high
impedance state. This allows the building of larger input arrays
while minimizing OFF channel output loading. The devices are
offered in a 24-lead TSSOP package.
TIME (ns)
OUTPUT VOLTAGE (V)
05
10
6.0
5.5
INPUT VOLTAGE (V)
2.5
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
3.0
–0.5
–1.0
3.5
4.0
2.0
1.5
1.0
INPUT
OUTPUT
15 20
5.0
25
Figure 1. AD8187 Video Amplitude Pulse
Response, V
OUT
= 1.4 V p-p, R
L
= 150
Ω
