AD7142: Signature capture

Question Is it possible for the AD7142 to be used with a touch glass ? Is it possible to use the AD7142 for signature capture ? Answer The AD7142 can function through a certain thickness of glass (a few mm). I assume that for signature capture, it is necessary to measure a 2d position repeatedly to obtain an image of the pen trajectory. In this case the AD7142's suitability would depend on obtaining sufficient resolution in the 2d space and sufficient sample rate.

AD714x: maximum glass thickness that can cover a PCB for Captouch using AD7142/3 or AD7147/8

Question What is the maximum glass thickness that can cover a PCB for Captouch using AD7142/3 or AD7147/8? Answer The sensors can operate correctly underneath a covering layer up to a maximum of 5 mm thick. Recommended thickness is 1 mm to 2 mm. The maximum thickness also depends on a number of factors like the size of the sensors or the material of the cover. Please note that we are recommending AD7147/8 for new designs since these parts provide larger response than the older AD7142/3.