• AD7147: Can several AD7147 be used in parallel to realize a remote control with 35 buttons?

    Can several AD7147 be used in parallel to realize a remote control with 35
    buttons?

     

    Several AD7147 devices cannot be connected to the same sensor module or keypad
    design due to crosstalk and interference from the excitation signals of one

  • AD7147: PCB layouts

    1)       Using the AD7142 is it possible to put the buttons on another board
    connected by a cable? Or is it better to have a short distance between the
    buttons and the AD717x?

    2)       Do you have PCB layouts for buttons for the AD7147 with one electrode…

  • LDC - AD7147 Eval-Board

    When we connected an AD7143-1 externally to AD7147-1 evaluation board (instead
    of AD7147-1), we noticed an automatic change in configuration/ID register of
    EEPROM. When we reconnected AD7147-1 (instead of AD7143-1) the configuration/ID
    register…

  • AD7147: Multiple devices in one application

    How to handle multiple AD7147-1 (3) in one application?

     

    We do not recommend to use multiple AD7147 in one application since we have
    observed in previous applications serious crosstalk issues when using multiple
    devices on the same sensor. The…

  • AD7147 initialization parameters

    Dear community,

    I have 2 doubts related to the initialization parameters of the AD7147 CDC:

    1. are the values specified for bank1 initialization mandatory? Or I can directly set them to the values needed for my specific case (apart from Address 0x001…

  • We have 8 AD7147 on operating on a single 2-layer PCB which......

    We have 8 AD7147 on operating on a single 2-layer PCB which. Devices operate
    properly as long as only one AD7147 is exciting the electrodes. From the posts
    available at the ENGINEER zone I suspect the problem lies in the interference
    caused by the unsynchronized…

  • Cannot avoid noise on AD7147 when touching sensor traces

    Dear community,

     

    I have a doubt related to the PCB layout for a capacitance sensor stretchable PCB, that needs to be connected to a separate PCB provided with AD7147 for capacitance acquisition. 

    The sensor board is a TPU 2 layers stretchable PCB. A simple…

  • RE: Questions about AD7147

    Hi Naohisa,

    Ans.:

    1.

    In the image, AC_SHIELD goes to the darker-shaded area – it surrounds the sensors. Then the Ground (lighter shade area) can surround the AC_SHIELD section. If you’re using a 4-layer board then you can also put AC_SHIELD on the layer…

  • the measuring range of capacitance of ad7147

    • Theoretically, for AD7147 , the capacitance of -8pF~8pF can be measured. But I looked the Figure18 in AD7147 Data sheet , can I measure  the capacitance of 0.283328pF?