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PDF ADV7283 Data sheet ( Hoja de datos )
| Número de pieza | ADV7283 | |
| Descripción | 4x Oversampled SDTV Video Decoder | |
| Fabricantes | Analog Devices | |
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Data Sheet
10-Bit, 4× Oversampled SDTV Video Decoder
with Differential Inputs and Deinterlacer
ADV7283
FEATURES
Worldwide NTSC/PAL/SECAM color demodulation support
One 10-bit analog-to-digital converter (ADC), 4× oversampling
per channel for CVBS, Y/C, and YPrPb modes
6 analog video input channels with on-chip antialiasing
filters
Video input support for CVBS (composite), Y/C (S-Video), and
YPrPb (component)
Fully differential, pseudo differential, and single-ended
CVBS video input support
NTSC/PAL/SECAM autodetection
Up to 4 V common-mode input range solution
Excellent common-mode noise rejection capabilities
5-line adaptive 2D comb filter and CTI video enhancement
Adaptive Digital Line Length Tracking (ADLLT), signal
processing, and enhanced FIFO management provide
time-base correction (TBC) functionality
Integrated automatic gain control (AGC) with adaptive peak
white mode
Fast switching capability
Integrated interlaced-to-progressive (I2P) video output
converter (deinterlacer)
Adaptive contrast enhancement (ACE)
Down dither (8-bit to 6-bit)
Rovi® (Macrovision) copy protection detection
8-bit ITU-R BT.656 YCrCb 4:2:2 output
Full featured vertical blanking interval (VBI) data slicer with
world system teletext (WST) support
Power-down mode available
2-wire, I2C-compatible serial interface
Qualified for automotive applications
−40°C to +105°C automotive temperature grade
−40°C to +85°C industrial qualified temperature grade
32-lead, 5 mm × 5 mm, RoHS-compliant LFCSP
APPLICATIONS
Automotive infotainment
Smartphone/multimedia handsets
DVRs for video security
Media players
GENERAL DESCRIPTION
The ADV7283 is a versatile one-chip, multiformat video
decoder that automatically detects standard analog baseband
video signals compatible with worldwide NTSC, PAL, and
SECAM standards in the form of composite, S-Video, and
component video.
The ADV7283 converts the analog video signals into a YCrCb
4:2:2 video data stream that is compatible with the 8-bit ITU-R
BT.656 interface standard.
The six analog video inputs of the ADV7283 can accept single-
ended, pseudo differential, and fully differential signals.
The ADV7283 contains a deinterlacer (I2P converter) that
allows the device to output video in a progressive format.
The ADV7283 is programmed via a 2-wire, serial bidirectional
port (I2C compatible) and is fabricated in a 1.8 V CMOS
process.
The ADV7283 is provided in a space-saving LFCSP surface-
mount, RoHS-compliant package.
The ADV7283 is available in an automotive grade rated over the
−40°C to +105°C temperature range, as well as a −40°C to +85°C
temperature range, making the device ideal for both automotive
and industrial applications.
Rev. A
Document Feedback
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility isassumed by Analog Devicesforitsuse, nor for any infringementsof patentsorother
rightsof third partiesthatmayresult fromitsuse. Specificationssubjecttochangewithout notice.No
licenseisgranted by implication or otherwiseunder any patent or patent rightsof Analog Devices.
Trademarks and registered trademarks are the property oftheir respective owners.
One Technology Way , P.O. Box 910 6, Norwood, MA 0206 2-9106 , U.S .A.
Tel: 78 1.32 9.47 00 ©2014–2016 Analog Devices, Inc. All rights reserved.
Technica l Support
www.analog.com
1 page  
ADV7283
Data Sheet
SPECIFICATIONS
ELECTRICAL SPECIFICATIONS
AVDD, DVDD, and PVDD = 1.71 V to 1.89 V, DVDDIO = 1.62 V to 3.63 V, specified at operating temperature range, unless otherwise noted.
Table 1.
Parameter
Symbol Test Conditions/Comments
Min Typ Max Unit
STATIC PERFORMANCE
ADC Resolution
N
10 Bits
Integral Nonlinearity
INL CVBS mode
2 LSB
Differential Nonlinearity
DNL CVBS mode
±0.6 LSB
DIGITAL INPUTS
Input High Voltage
Input Low Voltage
VIH DVDDIO = 3.3 V
DVDDIO = 1.8 V
VIL DVDDIO = 3.3 V
2V
1.2 V
0.8 V
Input Leakage Current
DVDDIO = 1.8 V
IIN RESET pin
0.4 V
−10 +10 µA
SDATA, SCLK pins
−10
+15 µA
PWRDWN, ALSB pins
−10
+50 µA
Input Capacitance
CIN
10 pF
CRYSTAL INPUT
Input High Voltage
Input Low Voltage
VIH XTALN pin
VIL XTALN pin
1.2 V
0.4 V
DIGITAL OUTPUTS
Output High Voltage
VOH
DVDDIO = 3.3 V, ISOURCE = 0.4 mA
2.4
V
Output Low Voltage
High Impedance Leakage Current
Output Capacitance
VOL
ILEAK
COUT
DVDDIO = 1.8 V, ISOURCE = 0.4 mA
DVDDIO = 3.3 V, ISINK = 3.2 mA
DVDDIO = 1.8 V, ISINK = 1.6 mA
1.4
V
0.4 V
0.2 V
10 µA
20 pF
POWER REQUIREMENTS1, 2, 3
Digital I/O Power Supply
PLL Power Supply
Analog Power Supply
Digital Power Supply
Digital I/O Supply Current
DVDDIO
PVDD
AVDD
DVDD
IDVDDIO
1.62 3.3
1.71 1.8
1.71 1.8
1.71 1.8
5
3.63 V
1.89 V
1.89 V
1.89 V
mA
PLL Supply Current
Analog Supply Current
Single-Ended CVBS Input
IPVDD
IAVDD
12 mA
47 mA
Differential CVBS Input
Fully differential and pseudo
differential CVBS
69
mA
Y/C Input
60 mA
YPrPb Input
75 mA
Digital Supply Current
Single-Ended CVBS Input
IDVDD
70 mA
Differential CVBS Input
Fully differential and pseudo
differential CVBS
70
mA
Y/C Input
70 mA
YPrPb Input
70 mA
Rev. A | Page 4 of 21
5 Page 
ADV7283
THEORY OF OPERATION
The ADV7283 is a versatile one-chip, multiformat video
decoder. The device automatically detects standard analog
baseband video signals compatible with worldwide NTSC, PAL,
and SECAM standards in the form of composite, S-Video, and
component video.
The ADV7283 converts the analog video signals into an 8-bit
YCrCb 4:2:2 video data stream that is compatible with the 8-bit
ITU-R BT.656 interface standard.
The analog video inputs of the ADV7283 accept single-ended,
pseudo differential, and fully differential composite video signals,
as well as S-Video and YPrPb video signals, supporting a wide
range of consumer and automotive video sources.
In differential CVBS mode, the ADV7283, along with an
external resistor divider, provides a common-mode input range
of up to 4 V, enabling the removal of large signal, common-mode
transients present on the video lines.
The advanced I2P function allows the ADV7283 to convert an
interlaced video input into a progressive video output. This
function is performed without the need for external memory.
The ADV7283 uses edge adaptive technology to minimize
video defects on low angle lines.
The AGC and clamp restore circuitry allow an input video
signal peak-to-peak range of 1.0 V p-p at the analog video input
pins of the ADV7283. Alternatively, the AGC and clamp restore
circuitry can be bypassed for manual settings.
The external ac coupling capacitors protect the ADV7283 from
short-to-battery (STB) events on the analog video input pins.
The ADV7283 supports a number of other functions, including
8-bit to 6-bit down dither mode and ACE.
The ADV7283 is programmed via a 2-wire, serial bidirectional
port (I2C compatible) and is fabricated in a 1.8 V CMOS
process. The monolithic CMOS construction of the ADV7283
ensures greater functionality with lower power dissipation.
The ADV7283 is provided in a space-saving LFCSP surface-
mount, RoHS-compliant package.
The ADV7283 is available in an automotive grade that is rated
over the−40°C to +105°C temperature range, making the device
ideal for automotive applications.
The ADV7283 is also available in a −40°C to +85°C temperature
range, making it ideal for industrial applications.
Data Sheet
ANALOG FRONT END
The analog front end (AFE) of the ADV7283 comprises a single
high speed, 10-bit ADC that digitizes the analog video signal
before applying it to the standard definition processor (SDP).
The AFE uses differential channels to the ADC to ensure high
performance in mixed-signal applications and to enable differential
CVBS inputs to connect directly to the ADV7283.
The AFE also includes an input mux that enables the
application of multiple video signals to the ADV7283. The input
mux allows the application of up to six composite video signals to
the ADV7283.
Current clamps are positioned in front of the ADC to ensure
that the video signal remains within the range of the converter.
A resistor divider network is required before each analog input
channel to ensure that the input signal is kept within the range
of the ADC (see the Input Networks section). Fine clamping of
the video signal is performed downstream by digital fine
clamping within the ADV7283.
Table 9 lists the three ADC clock rates that are determined by
the video input format to be processed. These clock rates ensure
4× oversampling per channel for CVBS, Y/C, and YPrPb modes.
Table 9. ADC Clock Rates
Input Format
CVBS (Composite)
Y/C (S-Video)
YPrPb (Component)
ADC Clock Rate
(MHz)1
57.27
114
172
Oversampling
Rate per
Channel
4×
4×
4×
1 Based on a 28.63636 MHz crystal between the XTALP and XTALN pins.
The fully differential AFE of the ADV7283 provides inherent
small and large signal noise rejection, improved
electromagnetic interference (EMI) protection, and the ability
to absorb ground bounce. Support is provided for both true
differential and pseudo differential signals.
Rev. A | Page 10 of 21
11 Page | ||
| Páginas | Total 22 Páginas | |
| PDF Descargar | [ Datasheet ADV7283.PDF ] | |
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