/blogs_/archives/b/precisionhub/posts/why-doesn-t-my-ina-cmrr-change-with-gainMy esteemed colleague, John Caldwell (not to be confused with &lsquo;John&rsquo; the intern ), authored a couple excellent blogs about instrumentation amplifier (INA) power supply and common-mode rejection ratio (PSRR &amp; CMRR). (See &ldqu...en-USTelligent Community 13https://e2e.ti.com/blogs_/archives/b/precisionhub/posts/why-doesn-t-my-ina-cmrr-change-with-gainTue, 01 Sep 2020 13:42:57 GMTcb01d8b2-d089-468d-babb-77d1d8683490:e5ea591a-51c9-4ddc-b5b8-0887da734b5cPete%20Semig0<p>Hello Rodrigo!</p> <p>The most efficient way to get technical support is by submitting this question as an E2E forum post as opposed to a comment on this blog. &nbsp;</p> <p>Thanks,</p> <p>Pete Semig</p> <img src="https://e2e.ti.com/aggbug?PostID=665832&AppID=930&AppType=Weblog&ContentType=0" width="1" height="1">https://e2e.ti.com/blogs_/archives/b/precisionhub/posts/why-doesn-t-my-ina-cmrr-change-with-gainTue, 01 Sep 2020 13:20:49 GMTcb01d8b2-d089-468d-babb-77d1d8683490:e5ea591a-51c9-4ddc-b5b8-0887da734b5cRodrigo Villela0<p>Dear TI,</p> <p>I&#39;m using INA332 in my project with wheatstone brigde (gain = 191,6/ input signal ~0mV up to 7,5mV), so I having stability problems &nbsp;output signal with differente board with same setup. I&#39;ve put resistor 470R@0.5% Vref pin, where I have around 40mV. Is it correct? why I don&#39;t have same result in differents boards?</p> <p>Thanks a million!</p> <p>best regards,</p> <p>Rodrigo Villela </p> <img src="https://e2e.ti.com/aggbug?PostID=665832&AppID=930&AppType=Weblog&ContentType=0" width="1" height="1">