AnsweredAssumed Answered

AD5933 bioimpedance measurement

Question asked by Plankton15 on Nov 12, 2016
Latest reply on Nov 22, 2016 by Snorlax


Sorry for my english, and i hope u will understand me.


I have big problem with AD5933. I made PCB with AD5933 and AD8606 (the same as in AN-1252) and im trying measure body composition but its not work. I used Rfb = 220 Ohm and Rcal = 470 Ohm range 1, and when i measure only resistor or capacitor its ok but when i try to measure body with freq 50kHz the impedance is equal 5kHz (it should be 500Hz). 

How can i calibrate device to have good result.

Please help.