NCS2553DGEVB

NCS2553
http://onsemi.com
7
APPLICATIONS INFORMATION
The NCS2553 triple video driver has been optimized for
Standard Definition video applications covering the
requirements of the CVBS, SVideo, 480i/525i & 576i/625i
standards. All the 3 channels feature the same specifications
and similar behaviors guaranteed by a high channelto
channel crosstalk isolation (down to 60 dB at 1 MHz). Each
channel provides an internal voltagetovoltage gain of 2
from its input to its output reducing the number of external
components usually needed in the case of some discrete
approaches (using standalone op amps). An internal level
shifter is employed shifting up the output voltage by adding
an offset of about 280 mV. This avoids sync pulse clipping
and allows DCcoupled output to the 150 W video load. In
addition, the NCS2553 integrates a 6
th
order Butterworth
filter per channel with a 3 dB frequency bandwidth of 8
MHz. This allows rejecting out the aliases or unwanted
oversampling effects produced by the video DAC.
Similarly, in the case of DVD recorders using ADC, this
antialiasing filter (reconstruction filter) will avoid picture
quality issues and will help to filter out parasitic signals
caused by EMI interference.
A builtin diodelike clamp is used in the chip for each
channel to support ACcoupled mode of operation. The
clamp is active when the input signal goes below 0 V.
Figure 13. ACCoupled Inputs and Outputs
DAC
0V
1V
2.28V
0.28V
75W
75W
75W
1V
PP
0.7V
PP
Z
O
= 75W
Z
O
= 75W
Z
O
= 75W
75W
75W
75W220mF
220mF
220mF
OUT1
OUT2
OUT3
1.68V
0.28V
0.1mF
0.1mF
0.1mF
R
S
R
S
R
S
IN1
IN2
IN3
Y, R’, G’, B’
Pb, Pr
Clamp Clamp Clamp
6db
6db
6db
0.7V
0V
8MHzLS
280mV800k
8MHzLS
280mV800k
8MHzLS
280mV800k
Figure 13 shows an example for which the external video
source coming from the DAC is ACcoupled at the input and
output. But thanks to the builtin transparent clamp and
level shifter the device can operate in different configuration
modes depending essentially on the DAC output signal level
High and Low and how it fits the input common mode
voltage of the video driver. When the configuration is
DCCoupled at the Inputs and Outputs the 0.1 mF and
220 mF coupling capacitors are no longer used, the clamps
are in that case inactive; this configuration has the big
advantage of being relatively low cost with the use of less
external components.
The input is ACcoupled if for example the inputsignal
amplitude goes over the range 0 to 1.4 V or if the video
source requires such a coupling. In some circumstances it
may be necessary to autobias signals by the addition of a
pullup and pulldown resistor or only pullup resistor
(Typical 7.5 MW combined with the internal 800 kW
pulldown) making the clamp inactive.
The output ACcoupling configuration has the advantage
of eliminating DC ground loop with the drawback of making
the device more sensitive to video line or field tilt issues in
the case of a too low output coupling capacitor. In some
cases it may be necessary to increase the nominal 220 mF
capacitor value.
NCS2553
http://onsemi.com
8
Figure 14. Typical Application Circuit
Video
SOC
R/Pr
G/Y
B/Pd
DVD Player or STB
R
S
R
S
R
S
2
3
4
DAC Load Resistors
ACCoupling Caps
are Optional
8
7
6
5
+5 V
10 mF0.1 mF
IN1
IN2
IN3
V
CC
OUT1
OUT2
OUT3
GND
NCS2553
75 W Video Cables
75 W 220 mF
75 W 220 mF
75 W 220 mF
75 W
75 W
75 W
R/Pr
G/Y
B/Pd
1
75 W Video Cables
75 W Video Cables
NCS2553
http://onsemi.com
9
PACKAGE DIMENSIONS
SOIC8 NB
CASE 75107
ISSUE AJ
SEATING
PLANE
1
4
58
N
J
X 45
_
K
NOTES:
1. DIMENSIONING AND TOLERANCING PER
ANSI Y14.5M, 1982.
2. CONTROLLING DIMENSION: MILLIMETER.
3. DIMENSION A AND B DO NOT INCLUDE
MOLD PROTRUSION.
4. MAXIMUM MOLD PROTRUSION 0.15 (0.006)
PER SIDE.
5. DIMENSION D DOES NOT INCLUDE DAMBAR
PROTRUSION. ALLOWABLE DAMBAR
PROTRUSION SHALL BE 0.127 (0.005) TOTAL
IN EXCESS OF THE D DIMENSION AT
MAXIMUM MATERIAL CONDITION.
6. 75101 THRU 75106 ARE OBSOLETE. NEW
STANDARD IS 75107.
A
B
S
D
H
C
0.10 (0.004)
DIM
A
MIN MAX MIN MAX
INCHES
4.80 5.00 0.189 0.197
MILLIMETERS
B 3.80 4.00 0.150 0.157
C 1.35 1.75 0.053 0.069
D 0.33 0.51 0.013 0.020
G 1.27 BSC 0.050 BSC
H 0.10 0.25 0.004 0.010
J 0.19 0.25 0.007 0.010
K 0.40 1.27 0.016 0.050
M 0 8 0 8
N 0.25 0.50 0.010 0.020
S 5.80 6.20 0.228 0.244
X
Y
G
M
Y
M
0.25 (0.010)
Z
Y
M
0.25 (0.010) Z
S
X
S
M
____
1.52
0.060
7.0
0.275
0.6
0.024
1.270
0.050
4.0
0.155
ǒ
mm
inches
Ǔ
SCALE 6:1
*For additional information on our PbFree strategy and soldering
details, please download the ON Semiconductor Soldering and
Mounting Techniques Reference Manual, SOLDERRM/D.
SOLDERING FOOTPRINT*
ON Semiconductor and are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC reserves the right to make changes without further notice
to any products herein. SCILLC makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does SCILLC assume any liability
arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages.
“Typical” parameters which may be provided in SCILLC data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All
operating parameters, including “Typicals” must be validated for each customer application by customer’s technical experts. SCILLC does not convey any license under its patent rights
nor the rights of others. SCILLC products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications
intended to support or sustain life, or for any other application in which the failure of the SCILLC product could create a situation where personal injury or death may occur. Should
Buyer purchase or use SCILLC products for any such unintended or unauthorized application, Buyer shall indemnify and hold SCILLC and its officers, employees, subsidiaries, affiliates,
and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death
associated with such unintended or unauthorized use, even if such claim alleges that SCILLC was negligent regarding the design or manufacture of the part. SCILLC is an Equal
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PUBLICATION ORDERING INFORMATION
N. American Technical Support: 8002829855 Toll Free
USA/Canada
Europe, Middle East and Africa Technical Support:
Phone: 421 33 790 2910
Japan Customer Focus Center
Phone: 81357733850
NCS2553/D
LITERATURE FULFILLMENT:
Literature Distribution Center for ON Semiconductor
P.O. Box 5163, Denver, Colorado 80217 USA
Phone: 3036752175 or 8003443860 Toll Free USA/Canada
Fax: 3036752176 or 8003443867 Toll Free USA/Canada
Email: orderlit@onsemi.com
ON Semiconductor Website: www.onsemi.com
Order Literature: http://www.onsemi.com/orderlit
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Sales Representative

NCS2553DGEVB

Mfr. #:
Manufacturer:
ON Semiconductor
Description:
Power Management IC Development Tools NCS2553D EVAL BOARD
Lifecycle:
New from this manufacturer.
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