Realization of Complex Impedance Measurement System Based on the Integrated Circuit AD5933

This paper describes realization of complex impedance measurement system based on integrated circuit AD5933. AD5933 is controlled by ATmega128 which performs all calculations and creates report for off-line analysis on PC. Created report of measured values of impedance magnitude and phase angle is stored on micro SD card in format which is compatible with MS Excel. Realized device is equipped with self-calibration system which ensures high accuracy in wide impedance range. Device also has alphanumeric LCD for displaying results. Realized system can be used for sensor or complex impedance measurements, structural health monitoring, noninvasive blood impedance measurements, electro-impedance spectroscopy, etc.