Multiformat Progressive Scan/HDTV
Encoder with Three 11-Bit DACs
and 10-Bit Data Input
a
ADV7195
FUNCTIONAL BLOCK DIAGRAM
FEATURES
INPUT FORMATS
YCrCb in 2 ꢀ 10-Bit (4:2:2) or 3 ꢀ 10-Bit (4:4:4) Format-
Compliant to SMPTE-293M (525p), ITU-R.BT1358
(625p), SMPTE274M (1080i), SMPTE296M (720p)
and Any Other High-Definition Standard Using
Async Timing Mode
SHARPNESS
FILTER CONTROL
AND
ADAPTIVE
FILTER CONTROL
ADV7195
CGMS
MACROVISION
11-BIT+
SYNC
DAC
DAC A (Y)
DAC B
LUMA
SSAF
Y0–Y9
Cr0–Cr9
Cb0–Cb9
CHROMA
4:2:2
TO
4:4:4
(SSAF)
RGB in 3 ꢀ 10 Bit (4:4:4) Format
TEST PATTERN
GENERATOR
AND
11-BIT
DAC
OUTPUT FORMATS
YPrPb Progressive Scan (EIA-770.1, EIA-770.2)
YPrPb HDTV (EIA-770.3)
RGB Levels Compliant to RS-170 and RS-343A
11-Bit + Sync (DAC A)
11-Bit DACs (DAC B, DAC C)
DELAY
AND
2ꢀ INTER-
POLATION
11-BIT
DAC
DAC C
GAMMA
CORRECTION
CHROMA
4:2:2
TO
4:4:4
(SSAF)
CLKIN
HORIZONTAL
SYNC
VERTICAL
SYNC
BLANKING
SYNC
GENERATOR
TIMING
GENERATOR
PROGRAMMABLE FEATURES
Internal Test Pattern Generator with Color Control
Y/C Delay (ꢁ)
VREF
DAC CONTROL
BLOCK
I2C MPU
PORT
RESET
COMP
RESET
Gamma Correction
Individual DAC On/Off Control
54 MHz Output (2ꢀ Oversampling)
Sharpness Filter with Programmable Gain/Attenuation
Programmable Adaptive Filter Control
Undershoot Limiter
The ADV7195 has three separate 10-bit-wide input ports that
accept data in 4:4:4 10-bit YCrCb or RGB or 4:2:2 10-bit YCrCb.
This data is accepted in progressive scan format at 27 MHz or
HDTV format at 74.25 MHz or 74.1758 MHz. For any other
high-definition standard but SMPTE293M, ITU-R BT.1358,
SMPTE274M or SMPTE296M the Async Timing Mode can
be used to input data to the ADV7195. For all standards, exter-
nal horizontal, vertical, and blanking signals or EAV/SAV codes
control the insertion of appropriate synchronization signals into
the digital data stream and therefore the output signals.
VBI Open Control
I2C® Filter
CGMS-A (525p)
2-Wire Serial MPU Interface
Single Supply 3.3 V Operation
52-MQFP Package
APPLICATIONS
Progressive Scan/HDTV Display Devices
MPEG at 81 MHz
Progressive Scan/HDTV Projection Systems
Digital Video Systems
High Resolution Color Graphics
Image Processing/Instrumentation
Digital Radio Modulation/Video Signal Reconstruction
The ADV7195 outputs analog YPrPb progressive scan format
complying to EIA-770.1, EIA-770.2; YPrPb HDTV complying
to EIA-770.3; RGB complying to RS-170/RS-343A.
The ADV7195 requires a single 3.3 V power supply, an
optional external 1.235 V reference and a 27 MHz clock in
Progressive Scan Mode or a 74.25 MHz (or 74.1758 MHz)
clock in HDTV mode.
In Progressive Scan Mode, a sharpness filter with programmable
gain allows high-frequency enhancement on the luminance signal.
Programmable Adaptive Filter Control, which may be used,
allows removal of ringing on the incoming Y data. The ADV7195
supports CGMS-A data control generation.
GENERAL DESCRIPTION
The ADV7195 is a triple high-speed, digital-to-analog encoder
on a single monolithic chip. It consists of three high-speed video
D/A converters with TTL-compatible inputs.
The ADV7195 is packaged in a 52-lead MQFP package.
I2C is a registered trademark of Philips Corporation.
REV. A
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.
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Tel: 781/329-4700
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© Analog Devices, Inc., 2002