op-amp's parameters

Discussion in 'General Electronics Chat' started by PG1995, Mar 18, 2012.

  1. PG1995

    Thread Starter Active Member

    Apr 15, 2011
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    Hi

    Please have a look on the attachment. From the table it looks like OP177 is the best one among them. But it has such low slew rate and the table doesn't list any value for it in Gain-Bandwidth Product column. Could you please tell me the reason for this? Thanks. And by the way, how much OP177 cost?

    Regards
    PG
     
  2. bertus

    Administrator

    Apr 5, 2008
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  3. Audioguru

    New Member

    Dec 20, 2007
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    Why don't you look at its detailed datasheet instead of your store's sales sheet?
    Why don't you look at an electronic parts distributor in your part of this world for its price?

    Digikey shows it in through hole and surface mount packages and with 20uV or 10uV input offset voltage. They show the poor slew rate and poor gain bandwidth product.
    Their prices are also shown.
     
  4. mlog

    Member

    Feb 11, 2012
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  5. PG1995

    Thread Starter Active Member

    Apr 15, 2011
    753
    5
    Thank you, Bertus, Audioguru, mlog.

    That table was from my book. I have just started studying about op-amp and after looking at the table that why they have such a low slew rate for OP177. Datasheets can be useful for persons like you who are very good at electronics and can extract useful information at a sight. But to me they are confusing and apart from that I was only concerned about the reason for low slew rate.

    Best wishes
    PG
     
  6. Audioguru

    New Member

    Dec 20, 2007
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    Older opamps like the 741, LM358 and LM324 had very low slew rates.
    They were not designed to produce hi-fi audio.
     
    PG1995 likes this.
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