D-Boss LT-40FLP, Руководство по обслуживанию

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SERVICE MANUAL
PAGE:
37
CIRCUIT DESCRIPTIONS
3. ADC SECTION.
Device: AD9882KST – 100.
Features: RGB Graphics Processing (A/D Converter).
Scan Converters.
Horizontal & Vertical Sync Processing
Digital Visual Interface
1) Description
Analog Interface
The AD9882 is a complete 8-bit, 100 MSPS monolithic analog interface optimized for
capturing RGB graphics signals from personal computers, workstations and DTV STB. Its
100MSPS encode rate capability and full power analog bandwidth of 300 MHz
supports resolutions up to WXGA (1280 × 768).
The AD9882 includes a 100 MHz triple ADC with internal1.25 V reference, a PLL, and
programmable gain, offset, and clamp control.
The AD9882 also offers full sync processing for composite sync and sync-on-green
applications. A clamp signal is generated internally or may be provided by the user
through the CLAMP input pin. This interface is fully programmable via a 2-wire serial
interface (I2C).
Fabricated in an advanced CMOS process, the AD9882 is provided in a space-saving
100-lead LQFP surface-mount plastic package.
Digital Inter face
The AD9882 contains a DVI 1.0 compatible receiver and supports display resolutions
Up to SXGA (1280 x 1024 ). The receiver features an intra-pair skew tolerance of up to
One full clock cycle
With the inclusion of HDCP, displays may now receive encrypted video content.
The AD9882 allows for authentication of a video receiver, decryption of encoded data
At the receiver, and renew-ability of that a authentication during transmission as
specified by the HDCP v1.0 protocol