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Assessing TLC2272 EMI immunity

Posted: 22 Jan 2014 ?? ?Print Version ?Bookmark and Share

Keywords:electromagnetic interference? EMI? rejection ratio? EMIRR? operational amplifiers?

The electromagnetic interference (EMI) rejection ratio, or EMIRR, describes the EMI immunity of operational amplifiers. An adverse effect that is common to many op amps is a change in the offset voltage as a result of RF signal rectification. An op amp that is more efficient at rejecting this change in offset as a result of EMI has a higher EMIRR and is quantified by a decibel value.

Measuring EMIRR can be performed in many ways, but this report provides the EMIRR IN+, which specifically describes the EMIRR performance when the RF signal is applied to the noninverting input pin of the op amp. In general, only the noninverting input is tested for EMIRR.

View the PDF document for more information.

Originally published by Texas Instruments at as "TLC2272 EMI Immunity Performance".

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