AD8197 dual mode (a dual 8:1 switch)

How to use two pices of ad8197 made a dual 8:1 switch,can I just link the output signals (TMDS、HDCP、DDC)  together?

(sorry,I have not  writen English for morethan ten years,so,my English is bad。)

thanks!

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  • +1
    •  Analog Employees 
    on Aug 13, 2020 8:50 AM 5 months ago

    Hi,

     Yes you can. Two AD8197s support HDMI/DVI dual-link. These details are provided in Page14 of AD8197 datasheet.

      AD8197 switching logic has three modes: quad mode (a quad 4:1 switch), dual mode (a dual 8:1 switch), and single mode (one 16:1 switch).
      The primary function of the AD8197 is to switch one of four (HDMI or DVI) single-link sources to one output.Each HDMI/DVI link consists of four differential, high speed channels and four auxiliary single-ended, low speed control signals.
    Note - Data Rate: Supports 250 Mbps to 2.25 Gbps data rates
               Supports 25 MHz to 225 MHz pixel clocks
               Equalized inputs for operation with long HDMI cables (20 meters at 2.25 Gbps) 

    Thanks,

    Poornima

  • thanks,if i want to build a large arrays ,16 dvi-d input and 1 dvi-d output, can the ad8197 support this idea? i Designed the logic block diagram,witch method can i chose? 

  • 0
    •  Analog Employees 
    on Aug 14, 2020 11:14 AM 5 months ago in reply to TJL1958

    Hi,

    I beieve, method B is more suitable,
    1.Two AD8197Bs support HDMI/DVI dual link
    2. The AD8197B is an HDMI/DVI switch, featuring equalized TMDS inputs and pre-emphasized TMDS outputs.
    It is in-tended for use as a 4:1 switch in systems with long cable runs  on both the input and/or the output, and is fully HDMI 1.3 receive-compliant.

    Note: AD8197 behaves as a single 16:1 TMDS channel multiplexer; one of the 16 input channels is routed to all of the outputs. Select which input channel is routed to the outputs by programming the HS_CH bits in the high speed device modes register in accordance with the switch mapping listed in Table 10. This mode is only accessible through the serial control interface. 

    Thanks,

    Poornima

Reply
  • 0
    •  Analog Employees 
    on Aug 14, 2020 11:14 AM 5 months ago in reply to TJL1958

    Hi,

    I beieve, method B is more suitable,
    1.Two AD8197Bs support HDMI/DVI dual link
    2. The AD8197B is an HDMI/DVI switch, featuring equalized TMDS inputs and pre-emphasized TMDS outputs.
    It is in-tended for use as a 4:1 switch in systems with long cable runs  on both the input and/or the output, and is fully HDMI 1.3 receive-compliant.

    Note: AD8197 behaves as a single 16:1 TMDS channel multiplexer; one of the 16 input channels is routed to all of the outputs. Select which input channel is routed to the outputs by programming the HS_CH bits in the high speed device modes register in accordance with the switch mapping listed in Table 10. This mode is only accessible through the serial control interface. 

    Thanks,

    Poornima

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