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AD9983A:  High Performance 8-Bit Display Interface

The AD9983A is a complete 8-bit, 140 MSPS, monolithic analog interface optimized for capturing YPbPr video and RGB graphics signals. Its 140 MSPS encode rate capability and full power analog bandwidth of 300 MHz support all HDTV video modes up to 1080i and 720p as well as graphics resolutions up to SXGA (1280 x 1024 at 75 Hz).

The AD9983A includes a 140 MHz triple ADC with an internal ...More

AD9983A:  High Performance 8-Bit Display Interface

Product Description

The AD9983A is a complete 8-bit, 140 MSPS, monolithic analog interface optimized for capturing YPbPr video and RGB graphics signals. Its 140 MSPS encode rate capability and full power analog bandwidth of 300 MHz support all HDTV video modes up to 1080i and 720p as well as graphics resolutions up to SXGA (1280 x 1024 at 75 Hz).

The AD9983A includes a 140 MHz triple ADC with an internal reference, a PLL, and programmable gain, offset, and clamp control. The user provides only a 1.8 V power supply and an analog input. Three-state CMOS outputs can be powered from 1.8 V to 3.3 V.

The AD9983A on-chip PLL generates a sample clock from the tri-level sync (for YPbPr video) or the horizontal sync (for RGB graphics). Sample clock output frequencies range from 10 MHz to 140 MHz. With internal coast generation, the PLL maintains its output frequency in the absence of sync input. A 32-step sampling clock phase adjustment is provided. Output data, sync, and clock phase relationships are maintained.

The auto-offset feature can be enabled to automatically restore the signal reference levels and to automatically calibrate out any offset differences between the three channels. The auto channel-to-channel gain matching feature can be enabled to minimize any gain mismatches between the three channels.

The AD9983A 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.

Fabricated in an advanced CMOS process, the AD9983A is provided in a space-saving 80-lead, Pb-free, LQFP surface-mount plastic package, and is specified over the 0°C to 70°C temperature range.

Applications

  • Advanced TVs
  • Plasma display panels
  • LCDTV
  • HDTV
  • RGB graphics processing
  • LCD monitors and projectors
  • Scan converters

Data Sheet, Rev. 0, 7/07

RESOURCES & TOOLS

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  • 8-bit analog-to-digital converters
  • 140 MSPS maximum conversion rate
  • Low PLL clock jitter at 140 MSPS
  • Automatic gain matching
  • Automated offset adjustment
  • 2:1 input mux
  • Power-down via dedicated pin or serial register
  • 4:4:4, 4:2:2, and DDR output format modes
  • Variable output drive strength
  • Odd/even field detection
  • External clock input
  • Regenerated Hsync output

Functional Block Diagram for AD9983A

OF NOTE ...

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类似产品

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AD9380 8 150 1080p/SXGA X - - X X 100-LQFP
AD9381 8 150 1080p/SXGA - - - - X 100-LQFP
AD9398 8 150 1080p/SXGA - - - - X 100-LQFP
AD9880 8 150 1080p/SXGA X - - X - 100-LQFP
AD9888 8 205 UXGA - - - - - 128-LQFP
AD9983A 8 170 UXGA X - - X - 64-LFCSP, 80-LQFP
AD9984A 10 170 UXGA X - - X - 64-LFCSP, 80-LQFP
AD9985A 8 140 SXGA X - - - - 80-LQFP
ADV7441A 10 170 1080p/UXGA X X X X X 144-LQFP
ADV7604 12 225 1080p/UXGA X X - X X -
ADV7614 - 225 1080p/UXGA - - - - X -
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