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The above example shows the calculation of an unknown impedance using the previously calculated Gain Factor. It is important to note that because the AD5933 has a finite frequency response, the gain factor also has a variation with frequency resulting in an error in the impedance calculation over a frequency range. To minimize this error, the frequency sweep should be limited to the smallest frequency range as possible (e.g., from 30KHz to 32KHz).
PTM Published on: 2007-09-17
Australia