Capability of EVAL-AD7147

I'm new to analog circuits so forgive me if this is a simple question. I'm interested in using a EVAL-AD7147 to measure some external capacitors. From what I saw in the data sheet the CIN pins have already been linked to the example capacitors on board. Is it possible to connect them to external capacitors?

Thank you for your assistance.

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  • Hi,

    The EVAL-AD7147 does not have a facility to connect an external capacitive sensor without modifying the board. The there is an option to connect the power and I2C lines from the board to an external device, so in this case you could build up a small AD7147 board with your required sensors, and connect through J1 or J2 to the EVAL-AD7147's ADUC841 microprocessor. You will need to set the switch on LK1 to OFF, to disconnect the on board AD7147 from the system.
    When you connect this way, you will be able to carry out your evaluation of the AD7147 on your board using the EVAL-AD7147 board's microprocessor and the supplied evaluation software.

    Can you share what your application is?

    Regards,
    Darragh

Reply
  • Hi,

    The EVAL-AD7147 does not have a facility to connect an external capacitive sensor without modifying the board. The there is an option to connect the power and I2C lines from the board to an external device, so in this case you could build up a small AD7147 board with your required sensors, and connect through J1 or J2 to the EVAL-AD7147's ADUC841 microprocessor. You will need to set the switch on LK1 to OFF, to disconnect the on board AD7147 from the system.
    When you connect this way, you will be able to carry out your evaluation of the AD7147 on your board using the EVAL-AD7147 board's microprocessor and the supplied evaluation software.

    Can you share what your application is?

    Regards,
    Darragh

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