EVAL-ADV7195EB【PDF 1/36 页】BOARD EVAL FOR ADV7195

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FEATURES

INPUT FORMATS

Multiformat Progressive Scan/HDTV

Encoder with Three 11-Bit DACs

and 10-Bit Data Input

ADV7195

FUNCTIONAL BLOCK DIAGRAM

YCrCb in 2

10-Bit (4:2:2) or 3

10-Bit (4:4:4) Format-

SHARPNESS

Compliant to SMPTE-293M (525p), ITU-R.BT1358

(625p), SMPTE274M (1080i), SMPTE296M (720p)

and Any Other High-Definition Standard Using

FILTER CONTROL

AND

ADAPTIVE

FILTER CONTROL

CGMS

MACROVISION

ADV7195

11-BIT+

Async Timing Mode

RGB in 3 10 Bit (4:4:4) Format

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

Y0–Y9

Cr0–Cr9

Cb0–Cb9

TEST PATTERN

GENERATOR

AND

DELAY

AND

GAMMA

CORRECTION

CHROMA

4:2:2

4:4:4

(SSAF)

CHROMA

4:2:2

LUMA

SSAF

2 INTER-

POLATION

SYNC

DAC

11-BIT

DAC

11-BIT

DAC

DAC A (Y)

DAC B

DAC C

11-Bit + Sync (DAC A)

4:4:4

(SSAF)

11-Bit DACs (DAC B, DAC C)

CLKIN

HORIZONTAL

SYNC

PROGRAMMABLE FEATURES

Internal Test Pattern Generator with Color Control

Y/C Delay ( )

SYNC

VERTICAL

SYNC

BLANKING

RESET

TIMING

GENERATOR

I 2 C MPU

PORT

GENERATOR

DAC CONTROL

BLOCK

V REF

RESET

COMP

Gamma Correction

Individual DAC On/Off Control

54 MHz Output (2

Oversampling)

Sharpness Filter with Programmable Gain/Attenuation

Programmable Adaptive Filter Control

Undershoot Limiter

VBI Open Control

I 2 C ? 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

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 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.

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.

The ADV7195 is packaged in a 52-lead MQFP package.

I 2 C 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, nor for any infringements of patents or other rights of third parties that

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 www.analog.com

Fax: 781/326-8703 ? Analog Devices, Inc., 2002

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