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ths8134b
Related Posts

  • Blog Post: New Application Note Releases

    Foe
    The following new TVP/THS application notes are now available from ( http://www.ti.com/ ). Literature Number Release Date Description SLEA073A August 2009 TVP5158 PCB Layout Guidelines SLEA075 September 2009 TVP5151 PCB Layout Guidelines SLEA076 June 2010 THS8134B PCB Layout Guidelines...
    on Jul 29, 2010

  • Forum Post: THS8134B

    Larry Blumer
    Hi, I'm using a THS8134B to output an RGB VGA signal. I have tied M1, M2 to GND and SYNC# and SYNC_T to DVdd. What I am seeing is an offset (300-500mV) on the green output. I've tried a few things but the offset still remains. I have noticed that the 8135 or 6 would seem to have another mode...
    on Sep 8, 2010

  • Forum Post: Re: THS8134B

    Larry Taylor
    Hi Larry, The THS8134B offset is apllied to the green channel to allow room for sync insertion and cannot be disabled. This is typically not an issue with video or graphics applications where the outputs are AC coupled prior to the monitor's DC restore. You are correct that with the THS8135...
    on Sep 9, 2010

  • Forum Post: Re: THS8134B

    Larry Blumer
    Hi, Thanks for the resonse. I had tried to AC couple the green signal, I had used a 10nF cap, not quite sure waht value would be best. What I see when I do that is a violet tint. I suspect now I'm not getting enough green drive? Thanks, Larry
    on Sep 9, 2010

  • Forum Post: Re: THS8134B

    Larry Taylor
    How does it look if you DC couple the green channel? 10nf is too small. The monitor should be able to handle a DC coupled input with the offset, since it problaby also supports sync-on green. Color inbalance could also occur if: - RGB mode is not enabled in the THS8134B. To ensure RGB mode, you...
    on Sep 9, 2010

  • Forum Post: Re: THS8134B

    Larry Blumer
    Hi Larry, Thanks for the response. When I DC couple there is a green tint, this varies with the display used. I'm driving a Dell VGA monitor and another small display. The datasheet is a little unclear, I'm setup for RGB mode M1,M2 = GND Syncs = H. Currently I can't pulse the syncs...
    on Sep 9, 2010

  • Forum Post: Re: THS8134B

    Larry Taylor
    Larry, Sounds like you have been careful with HSYNC position. HSYNC and VSYNC polarity, length, position are all important for digital monitor format detection and correct clamp or DC restore position. Are you using the /Blank control input to force blank or black level? If you look at RGB at...
    on Sep 9, 2010

  • Forum Post: Re: THS8134B

    saptarshi dutta
    Larry, Can i use the RGB output of tfp401 to drive the video DAC ths8134b.What will be the clock for DAC and how to get a seperate Sync from a embedded sync on green/sync on all channels. Saptarshi
    on Feb 18, 2011

  • Forum Post: video converters

    saptarshi dutta
    I am thinking of following choices: converting a HDMI signal to a DVI -------------via a cable Using a DVI receiver-------------------------------TFP401 Taking the 24-bit RGB output and connnecting the same to a video DAC THS8134B. Connecting this analog RGB/YPbPr output from DAC to a...
    on Feb 18, 2011

  • Forum Post: Re: video converters

    Larry Taylor
    Saptarshi, The TFP401 can output 1 pixel/clock over 24 bits, instead of even/odd. To connect to a DAC, single pixel 24-bit should be used. One potential issue with this is an 8-pixel latency through the DACs. Analog RGB out will be delayed relative HS. HS will have to be delayed somewhere in the...
    on Feb 18, 2011

  • Forum Post: Re: THS8134B

    Larry Taylor
    Saptarshi, See post at http://e2e.ti.com/support/data_converters/videoconverters/f/376/p/94683/330049.aspx#330049
    on Feb 18, 2011

  • Forum Post: Re: video converters

    saptarshi dutta
    Thanks Larry I think i will have to operate TFP401 in 1pixel/clock mode instead of 2pixel/clock. How the HS be delayed using I2C control?? Tell me which video DAC i need to use (THS8135 or THS8134B or THS8200) keeping in mind that TFP401 gives out 24 bits of RGB. (so probably 8 bit...
    on Feb 21, 2011

  • Forum Post: LCD to RGsB on low resolutions?

    Aleksey Susik
    Hello, I need to convert digital LCD signal to analog RGsB using ths8134b. But I think there will be a problem with low screen resolution (320x240 or so). Is it possible to make this video dac to work with 5-6MHz pixel clock? Thank you!
    on Mar 6, 2011

  • Forum Post: Re: LCD to RGsB on low resolutions?

    Larry Taylor
    Hi Aleksey, The THS8134B should work fine at these lower pixel rates.
    on Mar 7, 2011

  • Forum Post: THS8134B

    Stefano54155
    Hi, I'm using a THS8134b to get an RGB VGA output from a BT.656 1x8 bit input. I have tied M1, M2, /SYNC, SYNC_T and /BLANK to 3.3V and I am using GY7..0 as data input. Unconnected pins 9, 10, 13, 14, 35, 36 are tied to ground. Input data are coming from a DM365 in BT.656 standard with a...
    on Sep 1, 2011

  • Forum Post: Re: THS8134B

    Larry Taylor
    Hi, If you are trying to convert 8-bit YCbCr to RGB, the THS8134B cannot support this. You will need a device with a color space converter, such as the THS8200. Note that when an 8-bit interface is used with the THS8200, digital embedded syncs must be used.
    on Sep 1, 2011

  • Forum Post: Re: THS8134B

    Yucheng
    Hi, Same question. I used YCbCr-out to THS8134/5, but cannot convert data... the document show can do it. why cannot do it ?
    on Sep 16, 2011

  • Forum Post: Re: THS8134B

    Larry Taylor
    The THS8134/5 can support both RGBin/RGBout and YCbCr in/ YPbPr formats, but it cannot convert between RGB and YPbPr. The digital coding for the two color spaces are different. A color space converter is needed to convert color spaces. The RGB<>YPbPr mode switch in the THS8134/5 just changes the...
    on Sep 16, 2011

  • Forum Post: Re: THS8134B

    Yucheng
    Hi, Does THS8134/5 supports ITU-BT.656 input mode ? YCbCr 8bit input --> YPbPr outbut ?
    on Sep 19, 2011

  • Forum Post: THS8134B convert YCbCr

    Yucheng
    Hi, How do convert YCbCr BT656 8bit video source? DM36x YCbCr out (BT656) --> THS8134 YPbPr out.
    on Sep 23, 2011

  • Forum Post: Re: THS8134B convert YCbCr

    Larry Taylor
    Hi Yucheng, The THS8134B does not support bt656 with embedded digital syncs. For bt656 support with embedded sync support see the THS8200.
    on Sep 24, 2011

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