Professional NTSC/PAL Video Decoder
with 10-Bit CCIR656 Output
a
ADV7185
FEATURES
Digital Output Formats (20-Bit Wide Bus):
YCrCb (4:2:2 or 4:1:1)
Analog Video to Digital YCrCb Video Decoder:
NTSC-(M/N), PAL-(B/D/G/H/I/M/N)
ADV®7185 Integrates Two 12-Bit ADCs
Clocked from a Single 27 MHz Crystal
Dual Video Clocking Schemes:
CCIR601/CCIR656 8-Bit or Extended 10-Bit
0.5 V to 2.0 V p-p Input Range
Differential Gain, 0.4% Typ
Differential Phase, 0.6o Typ
Line-Locked Clock Compatible (LLC)
Adaptive Digital Line Length Tracking (ADLLT™)
3-Line Chroma Comb Filter
Programmable Video Controls:
Peak White/Hue/Brightness/Saturation/Contrast
CCIR/Square/4 FSC Pixel Operation
Real-Time Clock and Status Information Output
APPLICATIONS
Projectors
Digital TVs
DVD-RAM Recorders and Players
PDP Displays
Video Decoders
Hybrid Analog/Digital Set-Top Boxes
Professional Equipment
Integrated AGC (Automatic Gain Control) and Clamping
Multiple Programmable Analog Input Formats:
CVBS (Composite Video)
SVHS (Y/C)
YCrCb Component (VESA, MII, SMPTE, and BetaCam)
6 Analog Input Video Channels
Real-Time Horizontal and Vertical Scaling
Automatic NTSC/PAL Identification
Differential Mode Video Input
(continued on page 9)
FUNCTIONAL BLOCK DIAGRAM
P19–P0
PIXEL
O/P PORT
ADV7185
RESAMPLING
AND
HORIZONTAL
SCALING
SHAPING
LUMA
DELAY
BLOCK
PEAKING
HPF/LPF
AFF
AND
ISO
REFOUT
AIN1
NOTCH LPF
HFF/QCLK
AEF
FIFO CONTROL
BLOCK
LUMA
ANTIALIAS
LPF
12-BIT
ADC
SYNC
DETECTION
AND
2H LINE
MEMORY
PIXEL
OUTPUT
FORMATTER
DV
ANALOG I/P
MULTIPLEXING
AIN2
RD
AUTOMATIC
GAIN
CONTROL
(AGC)
AIN3
SUB-
CARRIER
RECOVERY
DTO
RESAMPLING
AND
HORIZONTAL
SCALING
CHROMA
COMB
FILTER
27MHz
OE
AIN4
GL/CLKIN
LLC1
CLAMP AND
DC RESTORE
AIN5
CHROMA
ANTIALIAS
LPF
SHAPING
LPF
12-BIT
ADC
LLC
SWITCH
AIN6
SYNTHESIS
WITH LINE-
LOCKED
OUTPUT
CLOCK
LLC2
LLCREF
27MHz XTAL
2
VIDEOTIMING AND
CONTROL BLOCK
I C-COMPATIBLE
INTERFACE PORT
OSCILLATOR
BLOCK
ELPF
HSYNC FIELD VSYNC HREF VREF
CLOCK
RESET SDATA SCLOCK ALSB
CLOCK
PWRDN
ADLLT is a trademark and ADV is a registered trademark of Analog Devices, Inc.
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, norforanyinfringementsofpatentsorotherrightsofthirdpartiesthat
may result from its use. No license is granted by implication or otherwise
under any patent or patent rights of Analog Devices.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
Fax: 781/326-8703
www.analog.com
© Analog Devices, Inc., 2002