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ADA4411-3 Datasheet(Fiches technique) 1 Page - Analog Devices

Numéro de pièce ADA4411-3
Description  Integrated Triple Video Filter and Buffer with Selectable Cutoff Frequencies and Multiplexed Inputs for RGB, HD/SD
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Integrated Triple Video Filter and Buffer with Selectable
Cutoff Frequencies and Multiplexed Inputs for RGB, HD/SD
ADA4411-3
Rev. 0
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibilityis assumedbyAnalogDevicesforitsuse,norforanyinfringements of patents or other
rightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.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
www.analog.com
Fax: 781.461.3113
© 2005 Analog Devices, Inc. All rights reserved.
FEATURES
FUNCTIONAL BLOCK DIAGRAM
Sixth-order adjustable video filters
CUTOFF SELECT
INPUT SELECT
DC
OFFSET
Y1/G1 IN
Y2/G2 IN
Pb1/B1 IN
Pb2/B2 IN
Pr1/R1 IN
Pr2/R2 IN
LEVEL2
LEVEL1
GAIN SELECT
2
Y/G OUT
Pb/B OUT
Pr/R OUT
DISABLE
36MHz, 18MHz, 9MHz
×2
×4
36MHz, 18MHz, 9MHz
×2
×4
36MHz, 18MHz, 9MHz
×2
×4
ADA4411-3
36 MHz, 18 MHz, and 9 MHz
Many video standards supported: RGB, YPbPr, YUV, SD, Y/C
Ideal for 720p and 1080i resolutions
−1 dB bandwidth of 30.5 MHz for HD
Low quiescent power
Only 265 mW for 3 channels on 5 V supply
Disable feature cuts supply current to 15 μA
2:1 mux on all inputs
Variable gain: ×2 or ×4
DC output offset adjust: ±0.5 V, input referred
Excellent video specifications
Wide supply range: +4.5 V to ±5 V
Rail-to-rail output
Output can swing 4.5 V p-p on single 5 V supply
Small packaging: 24-lead QSOP
Figure 1.
APPLICATIONS
Set-top boxes
Personal video recorders
DVD players and recorders
HDTVs
Projectors
GENERAL DESCRIPTION
The ADA4411-3 is a comprehensive filtering solution designed
to give designers the flexibility to easily filter and drive various
video signals, including high definition video. Cutoff frequen-
cies of the sixth-order video filters range from 9 MHz to
36 MHz and can be selected by two logic pins to obtain four
filter combinations that are tuned for RGB, high definition, and
standard definition video signals. The ADA4411-3 has a rail-
to-rail output that can swing 4.5 V p-p on a single 5 V supply.
The ADA4411-3 can operate on a single +5 V supply as well as
on ±5 V supplies. Single-supply operation is ideal in
applications where power consumption is critical. The disable
feature allows for further power conservation by reducing the
supply current to typically 15 μA when a particular device is not
in use.
Dual-supply operation is best for applications where the
negative-going video signal excursions must swing at or
below ground while maintaining excellent video performance.
The output buffers have the ability to drive two 75 Ω doubly
terminated cables that are either dc-coupled or ac-coupled.
The ADA4411-3 offers gain and voltage offset adjustments.
With a single logic pin, the throughput filter gain can be
selected to be ×2 or ×4. Output voltage offset is continuously
adjustable over an input-referred range of ±500 mV by applying
a differential voltage to an independent offset control input.
The ADA4411-3 is available in the 24-lead, wide body
QSOP and is rated for operation over the extended
industrial temperature range of −40°C to +85°C.
The ADA4411-3 offers 2:1 multiplexers on all of its video
inputs, which are useful in applications where filtering is
required for multiple sources of video signals.




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