Body impedance measurement IC

Thejesh,

I am still unclear what you want to measure: the electrode impedance or the body impedance?

If you want to measure the body impedance then you can check out the body composition Analog front end device AFE4300 for your application.

http://www.ti.com/product/afe4300

 Thanks Praveen

Sorry for the late reply,

I need  to measure the body impedance through electrodes, 

In my application I have 3 electrodes i.e 1. signal 2. signal reference 3. Ground.

In order to get low noise data  while acquiring, the impedance between 1 and 2, 2 and 3, 3 and 1 should be maintained equal so that  I can  reject common mode noise better. For this I need IC to show me the impedance b/w two electrodes prior to acquiring data..

please help me in this ...

Thanks

Thejesh,

What device are you using to measure the EEG signal? Is there a way to isolate that device while measuring the body impedance?

Hello Amy Ball,

Thanks for replying

I have separate circuit for EEG and using Analog MUX I can provide isolation for the EEG circuit.

Do you isolate the EEG circuit while measuring the body impedance? If not, try measuring it that way.