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AD9984A:  High Performance 10-Bit Display Interface

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Статус продукта:Производство

The AD9984A is a complete 10-bit, 170 MSPS, monolithic analog interface optimized for capturing YPbPr video and RGB graphics signals. Its 170 MSPS encode rate capability and full power analog bandwidth of 300 MHz support all HDTV video modes up to 1080p, as well as graphics resolutions up to UXGA (1600 × 1200 at 60 Hz).

The AD9984A includes a 170 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 AD9984A 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 170 MHz. With internal coast generation, the PLL maintains its output frequency in the absence of a 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 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 AD9984A also offers full sync processing for composite sync and sync-on-green applications. A clamp signal is generated internally or can be provided by the user through the CLAMP input pin.

Fabricated in an advanced CMOS process, the AD9984A is provided in a space-saving, Pb-free, 80-lead low profile quad flat package (LQFP) or 64-lead lead frame chip scale package (LFCSP) and is specified over the 0°C to 70°C temperature range.


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


  • 10-bit, analog-to-digital converters
  • 170 MSPS maximum conversion rate
  • Low PLL clock jitter at 170 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 AD9984A

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Наименование Тип контента Тип файлов
AD9984A: High Performance 10-Bit Display Interface Data Sheet (Rev 0, 07/2007) (pdf, 838 kB) Технические описания PDF
Analysis of Common Failures of HDMI CT
By Brett Li and Lie Dou, ATV Product Line, Analog Devices
(Digital TV DesignLine, 4/2/2008)
Технические статьи HTML
Analog Devices in Advanced TV Обзор HTML
RAQs index Rarely Asked Questions HTML
Словарь терминов Глоссарий HTML

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