Difference between ADuCM350 and ADuCM355, Labview-Examples

Dear ladies and gentlemen,

we would like to perform electrochemical measurements using ICs like the ADuCM355. In the manual of the ADuCM350, potentiostat measurements aren’t mentioned, but EIS-measurements are mentioned.

1) What is the difference between the ADuCM350 and the ADuCM355? Is it possible to do potentiostat measurements using the ADuCM350?

2) Do other ICs exist that can perform electrochemical measurements, i.e. electrochemical impedance sprectroscopy (EIS, measuring of the impedance of an electrochemical system at different frequencies), cyclic voltammetry (CV, applying a sawtooth shaped voltage to an electrochemical system) and open circuit potential (OCP) measuring the output voltage of an electrochemical system at quite high input impedances, such as 100 Gohms)

3) Do Labview-examples resp. Labview-VIs exist for communication with these ICs?

Kind regards

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  • 0
    •  Analog Employees 
    on Oct 7, 2019 8:27 AM

    Hi,

    Q1. The ADuCM355 is the more recent addition to the ADuC family and used the ADuCM350 as its design starting point.

    • The ADuCM355 additionally has 2x Low power, Low BW potentiostat loops + a wider BW loop supporting 0.01Hz to 200kHz for impedance measurements
      • The 2x Low power potentiostats are designed for low power sensor applications like toxic gas sensing
    • In comparison the ADuCM350 is designed for impedance measurements ranging from <1Hz to 80kHz.
      • But, it is possible to perform potentiostat measurements also. The voltage difference between the TIA amplifier and the Excitation amplifier sets the sensor's bias voltage.

    Q2. The AD5940 is another option - similar to the ADuCM355 but, without the microcontroller core.

    - 100Gohms impedances would require external amplifiers to accompany the ADuCM35x and AD5940 devices.

    Q3. The ADuCM355 example software provides simple examples for electrochemical techniques like EIS sweeps, CV and current measurements while generating different bias voltages across an EC sensor. The results are to the users PC via a UART-USB transceiver where the results can easily be captured in a text file and processed in Excel or in real-time via a Python or Labview script. However, we don't have example Labview VIs.

    See the Eval board user guide for details:

    https://www.analog.com/media/en/technical-documentation/user-guides/EVAL-ADuCM355QSPZ-UG-1308.pdf

    https://www.analog.com/en/design-center/evaluation-hardware-and-software/evaluation-boards-kits/eval-aducm355.html#eb-documentation

    regards,

    Mikel

Reply
  • 0
    •  Analog Employees 
    on Oct 7, 2019 8:27 AM

    Hi,

    Q1. The ADuCM355 is the more recent addition to the ADuC family and used the ADuCM350 as its design starting point.

    • The ADuCM355 additionally has 2x Low power, Low BW potentiostat loops + a wider BW loop supporting 0.01Hz to 200kHz for impedance measurements
      • The 2x Low power potentiostats are designed for low power sensor applications like toxic gas sensing
    • In comparison the ADuCM350 is designed for impedance measurements ranging from <1Hz to 80kHz.
      • But, it is possible to perform potentiostat measurements also. The voltage difference between the TIA amplifier and the Excitation amplifier sets the sensor's bias voltage.

    Q2. The AD5940 is another option - similar to the ADuCM355 but, without the microcontroller core.

    - 100Gohms impedances would require external amplifiers to accompany the ADuCM35x and AD5940 devices.

    Q3. The ADuCM355 example software provides simple examples for electrochemical techniques like EIS sweeps, CV and current measurements while generating different bias voltages across an EC sensor. The results are to the users PC via a UART-USB transceiver where the results can easily be captured in a text file and processed in Excel or in real-time via a Python or Labview script. However, we don't have example Labview VIs.

    See the Eval board user guide for details:

    https://www.analog.com/media/en/technical-documentation/user-guides/EVAL-ADuCM355QSPZ-UG-1308.pdf

    https://www.analog.com/en/design-center/evaluation-hardware-and-software/evaluation-boards-kits/eval-aducm355.html#eb-documentation

    regards,

    Mikel

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