How to measure input impedance of instrumentation amplifier

Saemyi Jeon

Intellectual 1110 points

Other Parts Discussed in Thread: INA116

Dear all,

I would like to know how to measure input impedance of instrumentation amplifier.

Would you let me know that?

Thank you.

over 11 years ago

0 Michael Brantley over 11 years ago

TI__Intellectual 1535 points

Input impedance is measured by measuring input bias current at two input voltages. The value for input impedanceshould be given in the data sheet - which part are you looking at?

We also have a blog post on determining these values, please see the following link:

http://e2e.ti.com/blogs_/archives/b/thesignal/archive/2012/07/16/i-need-high-input-impedance.aspx

I hope this helps!

0 Saemyi Jeon over 11 years ago in reply to Michael Brantley

TI__Intellectual 1110 points

I am looking at INA116 to measure ECG.

Thank you for your help.

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How to measure input impedance of instrumentation amplifier