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  • OPA1641-Q1: On the input voltage buffer of microphone audio acquisition

    Resolved
    Part Number: OPA1641-Q1 Other Parts Discussed in Thread: INA1650 , JFE150 , INA1620 ALL HI！ As shown in the figure below. The left J1 is the position of the external microphone. If I can't determine the mic_ The size of bias and the input voltage range of…
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    • Answered

  • OPA1641: Input Voltage Noise Density vs Frequency lower when operating at 5V supply in Spice

    Resolved
    Part Number: OPA1641 Other Parts Discussed in Thread: TINA-TI Hi, I'm performing a Spice Noise model verification of the OPA1641 in both Tina and LTSpice. I have the OPA1641 in a voltage follower configuration and checked the model at both +/-15 Vsupply…
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    • Answered

  • OPA1641: OPA1641 SPICE model question

    Resolved
    Part Number: OPA1641 Other Parts Discussed in Thread: TL081 , TL072 , TL082 , Hello, I'm modeling the input impedance of a simple non-inverting stage and finding that the impedance is very different from other TI JFET input opamps. Here is the simulation…
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    • Answered

  • OPA1641: Issues simulating opa1641 with single supply using tina ti

    Resolved
    Part Number: OPA1641 Hello, i'm having issues simulating a single supply opa1641 as a buffer. On the input, i have a sinewave, 100mv Vpp and a 100ohm internal resistance but the output is centered around 199mV. The singla amplitude is not the same…
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    • Answered

  • OPA1641: Recommended TI part for +/-15V power supply

    Resolved
    Part Number: OPA1641 Other Parts Discussed in Thread: TPS65130 , TPS7A39 Hi, I'm developing a circuit for guitar including an OPA1641 as pre-amp, and 2 buffer stages. My design will use +/-15V, generated from +9V. In terms of power for those stages…
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  • TINA/Spice/OPA1641: Reporting Spice model error

    Resolved
    Part Number: OPA1641 Other Parts Discussed in Thread: TINA-TI , , OPA1671 Tool/software: TINA-TI or Spice Models Hi guys, My customer found this and wanted to report it to be fixed (not time sensitive, as it is not impeding their progress): "The OPA1641…
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  • OPA1641: OPA1641 Application

    TI Thinks Resolved
    Part Number: OPA1641 Other Parts Discussed in Thread: OPA1642 , TL971 , RC4558 , OPA1662 , OPA1692 Hi TI, My application is: The external device only provides 8V power to the DSP module, and then the DSP module should output an audio signal with a peak to…

  • RE: OPA140: OPA140

    OPA140 closest alternative parts are OPA141, OPA1641 and OPA145.
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  • OPA1644: OPA1644 or OPA4134 for High End Guitar Audio amplification

    Resolved
    Part Number: OPA1644 Other Parts Discussed in Thread: OPA4134 , , OPA1656 , OPA828 , OPA627 , TL072 , OPA1612 , JFE150 , OPA202 , BUF634A , INA1620 , OPA1678 , TL074 , OPA1679 , OPA1641 , OPA1655 , OPA1611 , OPA637 Hello TI Audio World, I'm working on a Guitar audio processor…
    • Resolved

  • Datasheet error OPA1641/1642/1644

    Other Parts Discussed in Thread: OPA1641 Not sure if the forum is the right place to call this to TI's attention, but the datasheet for the OPA1641 audio op amp (and it's siblings) contains obvious errors in the electrical characteristics table.…

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