AD9985A
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AD9985A

110 MSPS/140 MSPS Analog Interface for Flat Panel Displays

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Part Details
Part Models 3
1ku List Price
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Features
  • Automated clamping level adjustment
  • 140 MSPS maximum conversion rate
  • 300 MHz analog bandwidth
  • 0.5 V to 1.0 V analog input range
  • 500 ps p-p PLL clock jitter at 110 MSPS
  • 3.3 V power supply
  • Full sync processing
  • Sync detect for hot plugging
  • Midscale clamping
  • Power-down mode
  • Low power: 500 mW typical
  • 4:2:2 output format mode
Additional Details
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The AD9985A is a complete 8-bit, 140 MSPS, monolithic analog interface optimized for capturing RGB graphics signals from personal computers and workstations. Its 140 MSPS encode rate capability and full power analog bandwidth of 300 MHz support resolutions up to SXGA (1280 × 1024 at 75 Hz).

The AD9985A includes a 140 MHz triple ADC with internal 1.25 V reference, a PLL, and programmable gain, offset, and clamp control. The user provides only a 3.3 V power supply, analog input, and horizontal sync (Hsync) and Coast signals. Three-state CMOS outputs can be powered from 2.5 V to 3.3 V.

The AD9985A’s on-chip PLL generates a pixel clock from the Hsync input. Pixel clock output frequencies range from 12 MHz to 140 MHz. PLL clock jitter is 500 ps p-p typical at 140 MSPS. When the COAST signal is presented, the PLL maintains its output frequency in the absence of Hsync. A sampling phase adjustment is provided. Data, Hsync, and clock output phase relationships are maintained.

The AD9985 also offers full sync processing for composite sync and sync-on-green applications, variable analog input bandwidth control, variable SOGIN bandwidth control and selectable input filtering.

A clamp signal is generated internally or can be provided by the user through the CLAMP input pin. This interface is fully programmable via a 2-wire serial interface.

Fabricated in an advanced CMOS process, the AD9985A is provided in a space-saving 80-lead LQFP surface-mount Pb-free plastic package, and is specified over the –40°C to +85°C temperature range.

APPLICATIONS

  • RGB graphics processing
  • LCD monitors and projectors
  • Plasma display panels
  • Scan converters
  • Microdisplays
  • Digital TVs
Part Models 3
1ku List Price
price unavailable

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Documentation

Documentation

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
AD9985ABSTZ-110
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AD9985AKSTZ-110
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AD9985AKSTZ-140
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Product Lifecycle

PCN

Feb 11, 2020

- 19_0236

Leadframe Format Change of Select QFP Products in Amkor Philippines

Jan 5, 2009

- 07_0077

Certification of STATSChipPAC Shanghai, China and AMKOR Philippines as additional sources for Assembly & Test of QFP Packages

Mar 10, 2010

- 10_0017

QFP Multigrade Laser Conversion

Sep 25, 2023

- 23_0060

Obsolescence of listed Video Part

AD9985ABSTZ-110

AD9985AKSTZ-110

AD9985AKSTZ-140

Filter by Model

reset

Reset Filters

Part Models

Product Lifecycle

PCN

Feb 11, 2020

- 19_0236

arrow down
Jan 5, 2009

- 07_0077

arrow down

Certification of STATSChipPAC Shanghai, China and AMKOR Philippines as additional sources for Assembly & Test of QFP Packages

Mar 10, 2010

- 10_0017

arrow down

QFP Multigrade Laser Conversion

Sep 25, 2023

- 23_0060

arrow down

Obsolescence of listed Video Part

AD9985ABSTZ-110

AD9985AKSTZ-110

AD9985AKSTZ-140

Software and Part Ecosystem

Software and Part Ecosystem

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