/blogs_/archives/b/thesignal/posts/i-need-high-input-impedanceOther Parts Discussed in Post: OPA211 , OPA320 In helping to select op amps and instrumentation amps I frequently hear the comment, “I need really high input impedance.” Oh really?… are you sure? It’s rare that input impedance, or more specificallyen-USTelligent Community 13https://e2e.ti.com/blogs_/archives/b/thesignal/posts/i-need-high-input-impedanceWed, 25 Aug 2021 11:49:28 GMTcb01d8b2-d089-468d-babb-77d1d8683490:a2078fad-2f63-4f03-8350-6ec9a304b970Alex Scott0<p>I agree that f<span>lowing in certain sensors and chemical cells such as pH probes, it can polarize the electrodes, creating <a href="https://nycpopcornremoval.com">drywall repair</a> error and even causing permanent damage. Input bias current will charge the capacitor of an integrator circuit, creating a ramping output with zero input.</span></p><img src="https://e2e.ti.com/aggbug?PostID=663341&AppID=864&AppType=Weblog&ContentType=0" width="1" height="1">