Pixel Switching for 鈥淧icture-In-Picture鈥?/div>
Switching in LCD and Plasma Displays
Video Switchers and Routers
750 MHz, 3.8 mA
10 ns Switching Multiplexers
AD8180/AD8182*
FUNCTIONAL BLOCK DIAGRAM
IN0 1
GND 2
IN1 3
+V
S
4
+1
DECODER
8 SELECT
7
ENABLE
6 OUT
+1
AD8180
5 鈥揤
S
IN0 A 1
GND 2
IN1 A 3
+V
S
4
IN1 B 5
GND 6
IN0 B 7
+1
DECODER
14 SELECT A
13
ENABLE
A
12 OUT A
+1
AD8182
+1
DECODER
11 鈥揤
S
10 OUT B
9
ENABLE
B
8 SELECT B
+1
Table I. Truth Table
PRODUCT DESCRIPTION
SELECT
0
1
0
1
ENABLE
0
0
1
1
OUTPUT
IN0
IN1
High Z
High Z
The AD8180 (single) and AD8182 (dual) are high speed 2-to-1
multiplexers. They offer 鈥? dB signal bandwidth greater than
750 MHz along with slew rate of 750 V/碌s. With better than
80 dB of crosstalk and isolation, they are useful in many high
speed applications. The differential gain and differential phase
error of 0.02% and 0.02擄, along with 0.1 dB flatness beyond
100 MHz make the AD8180 and AD8182 ideal for professional
video multiplexing. They offer 10 ns switching time making
them an excellent choice for pixel switching (picture-in-picture)
while consuming less than 3.8 mA (per 2:1 mux) on
鹵
5 V sup-
ply voltages.
Both devices offer a high speed disable feature allowing the
output to be configured into a high impedance state. This al-
lows multiple outputs to be connected together for cascading
stages while the 鈥淥FF鈥?channels do not load the output bus.
They operate on voltage supplies of
鹵5
V and are offered in 8-
and 14-lead plastic DIP and SOIC packages.
500mV
/DIV
5ns/DIV
Figure 1. AD8180/AD8182 Switching Characteristics
*Protected
under U.S. Patent Number 5,955,908.
REV. B
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漏 Analog Devices, Inc., 2000