AD9985A:  110 MSPS/140 MSPS Analog Interface for Flat Panel Displays

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 ...More

AdvantivAdditional product choices for Advanced TV applications are available on the Advantiv® site.

AD9985A:  110 MSPS/140 MSPS Analog Interface for Flat Panel Displays

Product Description

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

    • 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

    Diagrams

    AD9985A Diagram
    Functional Block Diagram for AD9985A

    Explore Other Products

    AD8195 - 1:1 HDMI/DVI Buffer with Equalization

    Subscribe to New Products Feed
    Part# Resolution (Bits) Sample Rate (MSPS) Max Resolution Auto Offset Auto Gain Video Decoder Macrovision Detection HDMI Rx Package
    AD9380 8 150 1080p/SXGA X - - X X 100-LQFP
    AD9381 8 150 1080p/SXGA - - - - X 100-LQFP
    AD9388A 10 170 UXGA X X - X X 144-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
    Pricing, Packaging & Availability

    Help

    Model
    The model number is a specific version of a generic that can be purchased or sampled.

    Status
    Status indicates the current lifecycle of the product. This can be one of 4 stages:
    • Pre-Release: The model has not been released to general production, but samples may be available.
    • Production: The model is currently being produced, and generally available for purchase and sampling.
    • Last Time Buy: The model has been scheduled for obsolescence, but may still be purchased for a limited time.
    • Obsolete: The specific part is obsolete and no longer available. Other models listed in the table may still be available (if they have a status that is not obsolete).
    Package Description
    The package for this IC (i.e. DIP, SOIC, BGA). An Evaluation Board is a board engineered to show the performance of the model, the part is included on the board.

    For detailed drawings and chemical composition please consult our  Package Site

    Pin Count
    Pin Count is the number of pins, balls, or pads on the device. Pin-out diagrams & pin function descriptions may be found in the datasheet.

    Temperature Range
    This is the acceptable operating range of the device. The various ranges specified are as follows:
    • Commercial: 0 to +70 degrees Celsius
    • Military : -55 to +125 degrees Celsius
    • Industrial: Temperature ranges may vary by model. Please consult the datasheet for more information.
    • Automotive: -40 to +125 degrees Celsius
    Price
    The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.

    Production Availability
    This is the date Analog Devices, Inc. anticipates that the product will ship from the warehouse. Most orders ship within 48 hours of this date.Once an order has been placed, Analog Devices, Inc. will send an Order Acknowledgement email to confirm your delivery date. It is important to note the scheduled dock date on the order entry screen. We do take orders for items that are not in stock, so delivery may be scheduled at a future date. Also, please note the warehouse location for the product ordered. We have warehouses in the United States, Europe and Southeast Asia. Transit times from these sites may vary.
    Sample availability may be better than production availability. Please enter samples into your cart to check sample availability.

    RoHS Compliant
    Due to environmental concerns, ADI offers many of our products in lead-free versions. For more information about lead-free parts, please consult our Pb (Lead) free information page.

    *The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.
    **Sample availability may be better than production availability. Please enter samples iinto your cart to check sample availability.

    View Sales and Distribution Offices