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schematic with ADS7846

Good Boy
Prodigy 30 points
Other Parts Discussed in Thread: ADS7846

Hi,

Please review my schematic of connecting Touch screen to ADS7846 and connecting ADS7846 to ARM MCU for mistakes and say to me if you have suggestions:

Please help me for using this touch screen driver.

  • 0
    Prodigy 30 points

    is it necessary to place 100nF capacitors on the X and Y lines between touch screen and ADS7846?

  • 0 in reply to Good Boy
    Prodigy 30 points

    another inactive official forum. why official forums like this are inactive and has very few answers ?

    I don't think that my question about this TI's product be very hard to answer for engineers in this forum. I bought this product and need to support for using it also there isn't sufficient resource and sample or typical circuit about this product in the web. Please help me to do my project with this product.

    Thanks,

    Regards.

  • 0 in reply to Good Boy
    TI__Guru 52115 points

    Your schematic is correct. If the LCD you are using is a bit noisy,  adding several decoupling capacitors, from Y+, Y–, X+, and X– to ground, is a good way to reduce the analog input noise from the LCD. For more information, you can take a look at the application note, which explains some very useful methods to reduce noise. Here is its link:http://www.ti.com/lit/an/sbaa155a/sbaa155a.pdf