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Single channel version of OPA2111

Friedrich Stockhammer
Prodigy 40 points

Other Parts Discussed in Thread: OPA627, OPA2134, OPA1642, OPA1602, OPA1652, OPA1662, OPA1612

What is the single channel version of the

OPA2111 TO99 or

OPA2111 PDIP

http://www.ti.com/product/OPA2111

  • 0
    TI__Guru**** 189401 points

    Hi, Friedrich,

    I am going to move your post to the Precision Amplifier e2e.

    -d2

  • 0
    TI__Guru* 75091 points

    Friedrich,

    The single version of OPA2111 is OPA111 but OPA111 is NOT recommended for new designs; the OPA111 has been replaced by OPA124 - this device has SIMILAR FUNCTIONALITY to OPA111 but is not functionally equivalent.

  • 0 in reply to Marek Lis
    Prodigy 40 points

    I use them for tuning high grade audio amplifiers and wonder that the OPA2111 sounds very well despite its low slew rate.

    In an other project I use OPA627 with best success.

    Which TI OPA are the dual channel model from the OPA627?

  • 0 in reply to Friedrich Stockhammer
    TI__Guru* 75091 points

    Friedrich,

    OPA2111 slew rate would only play a role if you exceed the full-power bandwidth shown in the graph below.  This would only happen at audio upper frequency of f=20kHz with the output peak-to-peak voltage of ~32Vpp or greater; f=SR/(Pi*Vout_pp) where SR is slew rate expressed in [V/us], Pi=~3.14, and Vout_pp is peak-to-peak output voltage.

    There is no dual version of OPA627 (it would be called OPA2627) but we have several other high fidelity JFET input audio dual op amps like OPA2134, OPA1642 and OPA1652, or bipolar input audio duals like OPA1602, OPA1612 and OPA1662.