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PDF AD8180 Data sheet ( Hoja de datos )
| Número de pieza | AD8180 | |
| Descripción | 750 MHz/ 3.8 mA 10 ns Switching Multiplexers | |
| Fabricantes | Analog Devices | |
| Logotipo |  |
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FEATURES
Fully Buffered Inputs and Outputs
Fast Channel Switching: 10 ns
High Speed
> 750 MHz Bandwidth (–3 dB)
750 V/s Slew Rate
Fast Settling Time of 14 ns to 0.1%
Low Power: 3.8 mA (AD8180), 6.8 mA (AD8182)
Excellent Video Specifications (RL ≥ 1 k⍀)
Gain Flatness of 0.1 dB Beyond 100 MHz
0.02% Differential Gain Error
0.02؇ Differential Phase Error
Low Glitch: < 35 mV
Low All-Hostile Crosstalk of –80 dB @ 5 MHz
High “OFF” Isolation of –90 dB @ 5 MHz
Low Cost
Fast Output Disable Feature for Connecting Multiple Devices
APPLICATIONS
Pixel Switching for “Picture-In-Picture”
Switching in LCD and Plasma Displays
Video Switchers and Routers
PRODUCT DESCRIPTION
The AD8180 (single) and AD8182 (dual) are high speed 2-to-1
multiplexers. They offer –3 dB signal bandwidth greater than
750 MHz along with slew rate of 750 V/µs. 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°, 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 ± 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 “OFF” channels do not load the output bus.
They operate on voltage supplies of ±5 V and are offered in 8-
and 14-lead plastic DIP and SOIC packages.
750 MHz, 3.8 mA
10 ns Switching Multiplexers
AD8180/AD8182
FUNCTIONAL BLOCK DIAGRAM
IN0 1
GND 2
IN1 3
+VS 4
+1
DECODER
+1
AD8180
8 SELECT
7 ENABLE
6 OUT
5 –VS
IN0 A 1
GND 2
IN1 A 3
+VS 4
IN1 B 5
GND 6
IN0 B 7
+1
DECODER
+1
AD8182
+1
DECODER
+1
14 SELECT A
13 ENABLE A
12 OUT A
11 –VS
10 OUT B
9 ENABLE B
8 SELECT B
Table I. Truth Table
SELECT
0
1
0
1
ENABLE
0
0
1
1
OUTPUT
IN0
IN1
High Z
High Z
500mV
/DIV
5ns/DIV
Figure 1. AD8180/AD8182 Switching Characteristics
REV. B
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., 2000
1 page  
50mV
/DIV
5ns/DIV
Figure 10. Small Signal Transient Response
500mV
/DIV
5ns/DIV
Figure 11. Large Signal Transient Response
0.020
0.015
0.010
0.005
0.000
–0.005
–0.010
–0.015
–0.020
0.02
0.01
0.00
–0.01
–0.02
RL = 1k⍀
NTSC
1
23
4
5 6 7 8 9 10 11
IRE
1
23
4
5 6 7 8 9 10 11
IRE
Figure 12. Differential Gain and Phase Error
AD8180/AD8182
–10
–20
50⍀ 1
–30 3
OUT A
1k⍀
VIN = 0.707V rms
RL = 1k⍀
–40
–50
–60
50⍀
5
VIN 50⍀
7
OUT B
1k⍀
AD8182
–70
AD8182R
–80 AD8180R
–90
–100
–110
0.1M
1M
10M
100M
FREQUENCY – Hz
1G
Figure 13. All-Hostile Crosstalk vs. Frequency
–10
ALL INPUTS = 0.446V rms
–20 RL = 30⍀
–30
–40
–50
50⍀
VIN 50⍀
–60
8180R OR
OUT A 8182R
30⍀ ENABLE A = LOGIC 1
ENABLE B = LOGIC 0
OUT B
30⍀
–70 AD8182
–80
–90
–100
8182R
ENABLE A/B = LOGIC 1
–110
0.03M 0.1M
1M 10M
FREQUENCY – Hz
100M
1G
Figure 14. “OFF” Isolation vs. Frequency
100
10
1
10 100
1k 10k 100k 1M 10M 30M
FREQUENCY – Hz
Figure 15. Voltage Noise vs. Frequency
REV. B
–5–
5 Page 
J1
IN0A
J2
IN1A
R10
C1
ANALOG
DEVICES
AD8180/82
EVALUATION
BOARD
J10
SEL A
J9
EN A
R1
U1
R9
R8
J8
A
R2
J3
IN1B
R3
C2
R5
R4
B
IN0B
J4
EN B
SEL B
J6
J5
Figure 28. Component Side Silkscreen
AD8180/AD8182
C3
R6
C4
Figure 30. Solder Side Silkscreen
Figure 29. Board Layout (Component Side)
Figure 31. Board Layout (Solder Side)
NOTES
1. AD8180R/AD8182R Evaluation Board inputs are configured
with 50 Ω impedance striplines. This FR4 board type has the
following stripline dimensions: 60-mil width, 12-mil gap
between center conductor and outside ground plane “is-
lands,” and 62-mil board thickness.
2. Several types of SMA connectors can be mounted on this
board: the side-mount type, which can be easily installed at
the edges of the board, and the top-mount type, which is
placed on top. When using the top-mount SMA connector, it
is recommended that the stripline on the outside 1/8" of the
board edge be removed with an X-Acto blade as this unused
stripline acts as an open stub, which could degrade the small-
signal frequency response of the mux.
3. Input termination resistor placement on the evaluation board
is critical to reducing crosstalk. Each termination resistor is
oriented so that ground return currents flow counterclock-
wise to a ground plane “island.” Although the direction of
this ground current flow is arbitrary, it is important that no
two input or output termination resistors share a connection
to the same ground “island.”
REV. B
–11–
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet AD8180.PDF ] | |
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