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Category: Datasheet/Specs
Good Morning. I need some help understanding the test on CN0552. I wanted to know what each value shown in the IIO Oscilloscope software means, for example, what each value means (capacitance0; capacitance0-capacitance2). I want to be able to really know what I'm measuring. And if you could also explain to me the pinout of CN0552.
  • Hi,

    For a quick guide about the CN0552. You can refer to its user guide found on this link: EVAL-CN0552-PMDZ Overview [Analog Devices Wiki]. You can see here also the sample video tutorial on how to read your measurements. To answer your question, the capacitance to be measured can be connected between the EXCA and CIN1+ pin, the readings will be displayed as capacitance0 and if you connect it between EXCB and CIN2+ pins, the measured will be displayed as capacitance 1. If you want to extend the range of your measurements, you must connect the load at EXC_EXTENDED.



  • About this link I already checked. I wanted to understand what each value that the software shows means, for example: what does capacitance0 mean;
    the capacitance0-capacitance2;
    and what does this difference in these subtractions mean. And also how do I interpret the reading of 2 capacitors on each channel.
    Another question, if you can help, is about how to increase the card's capacitance limit, as it only measures up to 4,096pF.
  • Hi  ,

    To specifically answer your questions, kindly see the table below. It shows here the CDC input channel and its equivalent channel name that is shown on the interface. 


    For example, you place your capacitor under test between CIN1(+) and EXCA pins, it will show as capacitance0 with a default unit of measurement of pico farad. And if you are set in a differential mode and you want to see the measurement between your CIN1(+) and CIN1(-) with respect to your EXCA, it will show as capacitance0-capacitance2, default unit in pico farad. Same case with the second channel. 

    You can see on the second image, the readings on capacitance0 is 2.49 pF which means that the capacitor placed at CIN1+ and EXCA is around 2pF.

    To increase the range of your measurement, as the EXCA and ECXB range is limited only at 4.096pF, you need to connect the capacitor under test between EXC_EXCTENDED and CIN1(+) or CIN2(+), the CAPDAC and other settings needed to operate in this mode can be found in CN0552 Circuit Note, CN0552 Circuit Note | Analog Devices.

    Hope this helps.



  • Good Morning! I wanted to know the function of this test using the 2 capacitors of 2pF each.
    When you connect the 2 capacitors in each channel, what do you want to measure between them,
    because in the example you made with the 2 capacitors of 2pF each in each channel turned on,
    it was around 2.4pF in each channel. What's the point of this? Another doubt, how do I measure 2 capacitors to be able to make the differential between them?
    In this example he made it shows the individual values ​​of each, but can I make this other type that measures the difference between them?