Multiformat SDTV Video Decoder with Fast
Switch Overlay Support
ADV7184
Digital output formats (8-bit or 16-bit)
FEATURES
ITU-R BT.656 YCrCb 4:2:2 output + HS, VS, and FIELD 0.5 V
to 1.6 V analog signal input range
Multiformat video decoder supports NTSC-(J, M, 4.43),
PAL-(B/D/G/H/I/M/N), SECAM
Differential gain: 0.5% typ
Integrates four 54 MHz, 10-bit ADCs
Differential phase: 0.5° typ
SCART fast blank support
Programmable video controls
Clocked from a single 28.63636 MHz crystal
Line-locked clock-compatible (LLC)
Adaptive digital line length tracking (ADLLT™), signal
processing, and enhanced FIFO management give mini
TBC functionality
5-line adaptive comb filters
Proprietary architecture for locking to weak, noisy, and
unstable video sources such as VCRs and tuners
Subcarrier frequency lock and status information output
Integrated AGC with adaptive peak white mode
Macrovision® copy protection detection
CTI (chroma transient improvement)
DNR (digital noise reduction)
Peak white/hue/brightness/saturation/contrast
Integrated on-chip video timing generator
Free-run mode (generates stable video output with no I/P)
VBI decode support for closed captioning (including XDS),
WSS, CGMS, Gemstar® 1×/2×, Teletext, VITC, VPS
Power-down mode
2-wire serial MPU interface (I2C®-compatible)
3.3 V analog, 1.8 V digital core; 3.3 V IO supply
Industrial temperature grade: –40°C to +85°C
80-lead LQFP Pb-free package
APPLICATIONS
DVD recorders
Video projectors
HDD-based PVRs/DVDRs
LCD TVs
Multiple programmable analog input formats
CVBS (composite video)
S-Video (Y/C)
YPrPb component (VESA, MII, SMPTE, and Betacam)
12 analog video input channels
Set-top boxes
Integrated antialiasing filters
Automatic NTSC/PAL/SECAM identification
Programmable interrupt request output pin
Security systems
Digital televisions
AVR receivers
GENERAL DESCRIPTION
The ADV7184 integrated video decoder automatically detects
and converts a standard analog baseband television signal,
which is compatible with worldwide standards NTSC, PAL,
and SECAM, into 4:2:2 component video data-compatible
with 16-bit or 8-bit CCIR601/CCIR656.
AGC and clamp restore circuitry allow an input video signal
peak-to-peak range of 0.5 V to 1.6 V. Alternatively, these can be
bypassed for manual settings.
The fixed 54 MHz clocking of the ADCs and datapath for all
modes allows very precise, accurate sampling and digital
filtering. The line locked clock output allows the output data
rate, timing signals, and output clock signals to be synchronous,
asynchronous, or line locked even with 5% line length
variation. The output control signals allow glueless interface
connections in almost any application. The ADV7184 modes
are set up over a 2-wire, serial, bidirectional port (I2C-
compatible).
The advanced and highly flexible digital output interface
enables performance video decoding and conversion in line-
locked clock-based systems. This makes the device ideally
suited for a broad range of applications with diverse analog video
characteristics, including tape-based sources, broadcast sources,
security and surveillance cameras, and professional systems.
The 10-bit accurate ADC provides professional quality video
performance and is unmatched. This allows true 8-bit
resolution in the 8-bit output mode.
SCART and overlay functionality are enabled by the ADV7184’s
ability to simultaneously process CVBS and standard definition
RGB signals. Signal mixing is controlled by the fast blank pin.
The 12 analog input channels accept standard composite,
S-Video, and YPrPb video signals in an extensive number of
combinations.
The ADV7184 is fabricated in a 3.3 V CMOS process. Its
monolithic CMOS construction ensures greater functionality
with lower power dissipation. The ADV7184 is packaged in a
small 80-lead LQFP Pb-free package.
Rev. 0
Information furnished by Analog Devices is believed to be accurate and reliable.
However, no responsibility is assumed by Analog Devices for its use, nor for any
infringements of patents or 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. Trademarks and
registered trademarks are the property of their respective owners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.461.3113
www.analog.com
© 2005 Analog Devices, Inc. All rights reserved.
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