Integrated Video Filter with Selectable Cutoff
Frequencies for RGB, HD/SD Y, C, and CV
ADA4410-6
Rev. B
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FEATURES
Sixth-order filters with selectable cutoff frequencies
36 MHz, 18 MHz, 9 MHz
Many video standards supported
RGB/YPbPr/YUV/SD/YC/CV
Ideal for resolutions up to 1080i
−1 dB bandwidth of 30 MHz for HD
2:1 multiplexers on all inputs
Selectable gain: ×2 or ×4
DC output offset adjust: ±0.5 V, input referred
Excellent video specifications
NTSC differential gain: 0.11%
NTSC differential phase: 0.25°
Low input bias current: 6.6 μA
Wide supply range: +4.5 V to ±5 V
Rail-to-rail output
Typical output swing of 4.5 V p-p on single 5 V supply
Disable feature
APPLICATIONS
Set-top boxes
DVD players and recorders
HDTVs
GENERAL DESCRIPTION
The ADA4410-6 is a comprehensive integrated filtering solution
that is carefully designed to give designers the flexibility to
easily filter and drive many types of video signals, including
high definition video. In the RGB/component channels, the
cutoff frequencies of the sixth-order filters can be selected by
two logic pins to obtain four filter combinations that are tuned
for RGB, high definition, and standard definition video. Cutoff
frequencies range from 9 MHz to 36 MHz.
The ADA4410-6 also provides filtering for the legacy standard
S-video and composite video signals. With a differential gain of
0.11% and a differential phase of 0.25°, the ADA4410-6 is an
excellent choice for any composite video (CV) application.
The ADA4410-6 offers gain and output offset voltage
adjustments. With a single logic pin, the gain of the part can be
selected to be ×2 or ×4. Output offset voltage is continuously
adjustable over an input-referred range of ±500 mV by applying
a differential voltage to an independent offset control input.
FUNCTIONAL BLOCK DIAGRAM
36MHz,
18MHz,
9MHz
36MHz,
18MHz,
9MHz
36MHz,
18MHz,
9MHz
9MHz
9MHz
Y1/G1 IN
Y2/G2 IN
×2
×4
Y/G OUT
Pb1/B1 IN
Pb2/B2 IN
×2
×4
Pb/B OUT
Pr1/R1 IN
Pr2/R2 IN
LEVEL1
DC
OFFSET
HD INPUT SELECT
LEVEL2
CUTOFF SELECT
GAIN SELECT
×2
×4
Pr/R OUT
Y1 IN
Y2 IN
×2
×4
Y OUT
C1 IN
C2 IN
SD INPUT SELECT
DISABLE
×2
×4
C OUT
×2
CV OUT
2
ADA4410-6
05265-001
Figure 1.
The ADA4410-6 offers 2:1 multiplexers on its inputs that can be
used in applications where multiple sources of video exist.
The ADA4410-6 can operate on a single +5 V supply as well as
±5 V supplies. Single-supply operation is ideal for 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 excursions of the signal 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- or ac-coupled.
The ADA4410-6 is available in a 32-lead LFCSP and operates in
the extended industrial temperature range of −40°C to +85°C.
