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Regarding Sensor matrix with mosfet

Hi i am planning to make sensor matrix with more than 100 sensors. I want to use the row-column approach taking a sensor with a mosfet for preventing cross talk. One issue that i am facing is cross talk between adjacent sensors and some leakage current during off time period of the duty cycle. I am using your popular multiplexer IC ADG 732. Please suggest how i can successfully deploy that matrix.

  • Hi,

    The channel to channel crosstalk spec of the ADG732 is -72dB. When you connect the drain of the multiple ADG732 together this could decrease on a system level. Also the more ADG732 you connect together will increase the leakage current levels. These will have to be consider when developing the system. Good Luck!