AD7746: FAQ

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  • AD7746: CDC up to 2nF

    Q Is there a capacitance to Digital converter with which I can measure changes in capacity up to 2 nF? A The widest input capacitance range is +/-8pF for ADI Capacitance To Digital converters so…
  • AD7746_input impedance

    Q I am using AD7746 for voltage measurement (along with a capacitance measurement using the other channel.). What is the input impedence of the voltage channel ADC? A The voltage inputs use switched…
  • Can you send me the AD7746 Labview Source Code?

    The evaluation system contains our CDC component, which we want the customers to evaluate and to which we are, of course, prepared to provide full support for. The evaluation system also includes a third…
  • EVAL-AD7746LDZ - Ground electrode connected to liquid

    Q I read your article „Liquid Level Sensing Using Capacitive-to-Digital Converters“ and I’m interested in this form of level sensing. We received the EVAL-AD7746LDZ to make tests. But we have a question…
  • Is it possible to use an external excitation device to produce a higher excitation frequency i.e. 1Mhz with the AD7746 device?

    Q Is it possible to use an external excitation device to produce a higher excitation frequency i.e. 1Mhz with the AD7746 device? If yes, what would be the setup/setting/precautions needed to take note…
  • Measure up to 150pF

    Q Is it possible to measure up to 150pF with the AD774x? A Here are two tricks to increase the capacitive input range. 1) Connect a known fixed capacitor in series with the sensor. That would work…

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