AD9388ABSTZ-5P datasheet(16/28 Pages) AD

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AD9388A

Rev. B | Page 16 of 28

FUNCTIONAL OVERVIEW

The following overview provides a brief description of the

functionality of the AD9388A. More details are available in the

Theory of Operation section.

ANALOG FRONT END

The analog front end of the AD9388A provides three high quality

10-bit ADCs to enable true 10-bit video decoding, a multiplexer

with 12 analog input channels to enable a multisource connection

without the requirement of an external multiplexer, and three

current and voltage clamp control loops to ensure that dc offsets

are removed from the video signal.

HDMI RECEIVER

The AD9388A is compatible with the HDMI 1.3 specification.

The AD9388A supports all HDTV formats up to 1080p in

nondeep color mode and 1080p in 36-bit deep color mode.

Furthermore, it supports all display resolutions up to UXGA

(1600 × 1200 at 60 Hz).

This device includes the following features:

•

Adaptive front-end equalization for HDMI operation over

cable lengths of up to 30 meters.

•

Synchronization conditioning for higher performance in

strenuous conditions.

•

Audio mute for removing extraneous noises.

•

Programmable data island packet interrupt generator.

COMPONENT PROCESSOR PIXEL DATA

OUTPUT MODES

The AD9388A features single data rate outputs as follows:

•

8-/10-bit 4:2:2 YCrCb for 525i, 625i.

•

16-/20-bit 4:2:2 YCrCb for all standards.

•

24-/30-bit 4:4:4 YCrCb/RGB for all standards.

COMPONENT VIDEO PROCESSING

The AD9388A supports 525i, 625i, 525p, 625p, 720p, 1080i,

1080p, and many other HDTV formats; automatic adjustment

of gain (contrast) and offset (brightness); manual adjustment

controls; analog component YPrPb/RGB video formats with

embedded synchronization or with separate HS, VS, or CS;

YCrCb-to-RGB and RGB-to-YCrCb conversions by any-to-any,

3 × 3, color-space conversion matrices; and user-defined pixel

sampling for nonstandard video sources.

In addition, the AD9388A features brightness, saturation, and

hue controls. System level component format detection is

enabled by standard identification (STDI), and a synchroniza-

tion source polarity detector (SSPD) determines the source and

polarity of the synchronization signals that accompany the

input video.

Certified Macrovision® copy-protection detection is available on

component formats (525i, 625i, 525p, and 625p).

When no video input is present, stable timing is provided by the

free run output mode.

RGB GRAPHICS PROCESSING

The AD9388A provides 170 MSPS conversion rate support of

RGB input resolutions up to 1600 × 1200 at 60 Hz (UXGA).

The AD9388A offers automatic or manual clamp and gain controls

for graphics modes.

Similar to the component video processing features, the RBG

graphics processing for the AD9388A features contrast and

brightness controls, automatic detection of synchronization

source and polarity by the SSPD block, standard identification

enabled by the STDI block, and user-defined pixel sampling

support for nonstandard video sources.

Additional RGB graphics processing features of the AD9388A

include the following:

•

Sampling PLL clock with 500 ps p-p jitter at 150 MSPS.

•

32-phase DLL support of optimum pixel clock sampling.

•

Color-space conversion of RGB to YCrCb and decimation

to a 4:2:2 format for videocentric, back-end IC interfacing.

•

Data enable (DE) output signal supplied for direct

connection to HDMI/DVI transmitter IC.

GENERAL FEATURES

The AD9388A offers a high quality multiformat video decoder

and digitizer that features HS, VS, and FIELD output signals

with programmable position, polarity, and width; program-

mable interrupt request output pins (INT1 and INT2); low

power consumption: 1.8 V digital core and analog input, 3.3 V

digital input/output, low power power-down mode; and a

temperature range of −40°C to +85°C in a 144-lead, 20 mm ×

20 mm, RoHS-compliant LQFP.

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