|
|
PDF AD8183 Data sheet ( Hoja de datos )
| Número de pieza | AD8183 | |
| Descripción | Triple 2:1 Multiplexers | |
| Fabricantes | Analog Devices | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de AD8183 (archivo pdf) en la parte inferior de esta página. Total 12 Páginas | ||
|
No Preview Available !
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 (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
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
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.
380 MHz, 25 mA,
Triple 2:1 Multiplexers
AD8183/AD8185
FUNCTIONAL BLOCK DIAGRAM
IN0A 1
DGND 2
IN1A 3
GND 4
IN2A 5
VCC 6
VEE 7
IN2B 8
GND 9
IN1B 10
GND 11
IN0B 12
AD8183/AD8185
24 VCC
SELECT
23 OE
DISABLE
22 SEL A/B
21 VCC
0 20 OUT0
19 VEE
1 18 OUT1
17 VCC
2 16 OUT2
15 VEE
14 DVCC
13 VCC
Table I. Truth Table
SEL A/B
0
1
0
1
OE
0
0
1
1
OUT
INA
INB
High Z
High Z
VO = 1.4V STEP
1.4V RL = 150⍀
1.2V
1.0V
0.8V
0.6V
0.4V
0.2V
0.0V
200mV
2ns
Figure 1. AD8185 Pulse Response; RL = 150 Ω
Rev. A
Document Feedback
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibilityisassumedbyAnalogDevices for itsuse,nor foranyinfringementsofpatentsor other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700 ©1999–2016 Analog Devices, Inc. All rights reserved.
Technical Support
www.analog.com
1 page  
–10
–20
RL = 1k⍀
RT = 37.5⍀
–30
–40
–50
ALL-HOSTILE
–60
ADJACENT
–70
–80
–90
–100
–110
1
10 100
FREQUENCY – MHz
1k
Figure 9. AD8183 Crosstalk vs. Frequency
–10
–20
RL = 1k⍀
RT = 37.5⍀
–30
–40
–50
–60
DRIVE B, LISTEN A
–70
–80
DRIVE A, LISTEN B
–90
–100
–110
1
10 100
FREQUENCY – MHz
1k
Figure 10. AD8183 Channel-to-Channel Crosstalk vs.
Frequency
0
–10
VO = 2V p-p
RL = 150⍀
–20
–30
–40
–50
SECOND HARMONIC
–60
–70
THIRD HARMONIC
–80
–90
–100
1
10
FUNDAMENTAL FREQUENCY – MHz
100
Figure 11. AD8183 Distortion vs. Frequency
AD8183/AD8185
–10
–20
RL = 150⍀
RT = 37.5⍀
–30 RTI MEASURED
–40
–50
–60
ALL-HOSTILE
–70
–80 ADJACENT
–90
–100
–110
1
10 100
FREQUENCY – MHz
1k
Figure 12. AD8185 Crosstalk vs. Frequency
–10
–20
RL = 150⍀
RT = 37.5⍀
–30 RTI MEASURED
–40
–50
–60
DRIVE A, LISTEN B
–70
–80
DRIVE B, LISTEN A
–90
–100
–110
1
10 100
FREQUENCY – MHz
1k
Figure 13. AD8185 Channel-to-Channel Crosstalk vs.
Frequency
0
VO = 2V p-p
–10 RL = 150⍀
–20
–30
–40
–50
SECOND HARMONIC
–60
–70
THIRD HARMONIC
–80
–90
–100
1
10
FUNDAMENTAL FREQUENCY – MHz
100
Figure 14. AD8185 Distortion vs. Frequency
5(9$
–5–
5 Page 
AD8183/AD8185
Third, the additional power and ground pins also yield lower
impedance on the power and ground lines, and therefore minimize
the effects of shared impedances on crosstalk.
Signal routing is also important for keeping crosstalk low.
Shielding and separation should be used for signals that must
run parallel over some length on the PC board. If signals must
cross, the trace widths should be kept narrow, and the signals
should cross at right angles to minimize the capacitance between
the traces.
4:1 RGB Multiplexer
For selecting among four RGB sources to drive a monitor, two
AD8185s can be combined to make a 4:1 RGB multiplexer. A
circuit for this is shown in Figure 40. Each RGB source is con-
nected to either the three “A” or “B” inputs of one of the
AD8185s. In addition, all R signals are tied to “0” inputs, all
G signals are tied to “1” inputs, and all B signals are tied to “2”
inputs. All of these input signals should be terminated with the
standard 75 Ω to ground very close to the IC pins.
Each of the outputs of the AD8185 has a series 75 Ω resistor to
provide a back termination for the monitor load. Whichever
device is selected will drive the output signal through its three
termination resistors. When terminated by the monitor, the
voltage of these signals will be attenuated by a factor of two.
This is normalized by the gain-of-two of the AD8185.
Unlike many gain-of-two circuits, the impedance of the AD8185
is very high when it is disabled. This is due to a proprietary
circuit that disconnects the feedback network from a low imped-
ance when the part is disabled.
A delay circuit is provided for each device to ensure that the
outputs of one device are disabled before the outputs of the
other are enabled.
If the RGB signals contain the sync information, such as a sync-
on-Green, this circuit is all that is necessary for the full 4:1 RGB
mux. However, if sync is carried on separate signals, such as in
PCs, the sync signals can be multiplexed through a digital multi-
plexer that operates from the same SEL signals.
The RC in the OE circuit is to ensure “Break-Before-Make”
operation. Using the values shown, a 20 ns time constant is
created. This will delay the enabling of the outputs of the new
selection until after the other devices’ outputs are disabled. This
time can be shortened or eliminated if the system can tolerate
the glitches caused by simultaneously enabled outputs.
R
G
B
SOURCE 0
R
G
B
SOURCE 1
75⍀
75⍀
75⍀
75⍀
75⍀
75⍀
200⍀ 100pF
IN0A
IN0B
IN1A
IN1B
IN2A
IN2B
SEL A/B
OE
75⍀ RED
OE OUT0
75⍀ GREEN
OE OUT1
TO
MONITOR
75⍀ BLUE
OE OUT2
R
G
B
SOURCE 2
75⍀
75⍀
75⍀
SEL 0
R
G
B
SOURCE 3
75⍀
75⍀
75⍀
IN0A
IN0B
IN1A
IN1B
IN2A
IN2B
SEL A/B
OE
SEL 1
200⍀ 100pF
75⍀
OE OUT0
75⍀
OE OUT1
75⍀
OE OUT2
Figure 40. 4:1 RGB Multiplexer
Two control bits are required to select the input source for the
RGB signals. One is applied to each of the SEL A/B inputs of
each device to select between the two input sources for that
device. The other bit controls the OE inputs of the two devices.
5(9$
–11–
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet AD8183.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| AD818 | Low Cost/ Low Power Video Op Amp | Analog Devices |
| AD8180 | 750 MHz/ 3.8 mA 10 ns Switching Multiplexers | Analog Devices |
| AD8182 | 750 MHz/ 3.8 mA 10 ns Switching Multiplexers | Analog Devices |
| AD8183 | Triple 2:1 Multiplexers | Analog Devices |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |