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How to select OP-AMP

In Texas website(http://www.ti.com/paramsearch/docs/parametricsearch.tsp?family=analog&familyId=1468&uiTemplateId=NODE_STRY_PGE_T)

I saw few parameters used to categorize OP-AMP's like Status,2nd Harmonic (dBc),3rd Harmonic (dBc),Acl, min stable gain (V/V),Iq per channel (Max) (mA),Number of Channels,Vn at Flatband (Typ) (nV/rtHz)


Can  any one tell me what these parameters are and also whether they have to less or more for a good OP-AMP.

  • Deepak,

    The link you have attached is for selecting high speed products - the general purpose op amp selection tool you may find under following link:

    http://www.ti.com/lsds/ti/amplifiers-linear/general-purpose-amplifier-products.page

    ACL, min stable gain means a close-loop minimum stable gain (some op amp are not stable in a unity-gain - follower cinfiguration)

    IQ per channel (Max) means a maximum quiescent current per channel (there can more than one op amp in a single package).

    Number of channels specifies how many op amps are included in a single package (typically, single, dual or quad).

    For more detailed explanation of various op amp parameters, please see attached excerpts from Op Amp for Everyone.

    Understanding Op Amp Parameters.pdf
  • Thank you for that pdf file. One more thing. I have seen in many posts TI employees posting such pdf files. From where can I find all of them?

  • Deepak,

    Since you are not TI employee, the best way to find such articles is to google them - see link below:

    https://www.google.com/search?q=op+amp+parameter&ie=utf-8&oe=utf-8&aq=t&rls=org.mozilla:en-US:official&client=firefox-a