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  • OPA1655: Additional insight on bypass/decoupling capacitance and power supply noise reduction

    Part Number: OPA1655 Other Parts Discussed in Thread: TINA-TI , , JFE150EVM Hello team, Using the OPA1655 under dual supply conditions (VS = ± 3V) to amplify a 10 kHz square wave modulated signal. The closed-loop bandwidth (or cutoff frequency) of the OPA1655…

  • OPA1655: measurement setup

    Part Number: OPA1655 Other Parts Discussed in Thread: OPA1612 Hi Team, In the datasheet for the OPA1655DBVT amplifier, it is specified that the typical THD+N (distortion plus noise) for: Gain = 1, Rload = 600 ohms, Vout = 3.5v rms, frequency = 1 kHz, 80k…
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  • OPA1655: Confused output V vs I plot?

    Resolved
    Part Number: OPA1655 Really nice new part, looks like some high speed folks might have contributed - however, these two plots look odd, I use these plots to estimate a linear output current entry for the parametric database. Usually a 0.5V drop off of…
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    • Answered

  • INA253: using INA253 in the feedback loop of a current output amplifier

    Resolved
    Part Number: INA253 Other Parts Discussed in Thread: OPA1655 , Tool/software: Hi, I am investigating driving high end speakers with a current output amplifier rather than a voltage output amplifier. There are several reasons to do this, see the book ISBN…
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  • PGA2500: using the output single ended

    Resolved
    Part Number: PGA2500 Other Parts Discussed in Thread: OPA1655 Tool/software: I'm planning on using the PGA2500 in my design but I don't need a diff. output. Not seeing much about the internal circuitry of this device on the data sheet, I presume…
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    • Answered

  • RE: OPA1642: Unexpected behavior in single supply circuit

    Resolved
    Hey Ron, No problem. I will take a look at the previous devices you mentioned for a comparison and try to narrow down some good suggestions for you. What is the intended application that this amplifier will be used for. Will it be used to drive a speaker…
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  • BUF634A: Should there be a cap in series with Neg input resistor?

    Resolved
    Part Number: BUF634A Other Parts Discussed in Thread: OPA2810 , OPA810 , OPA1656 , INA1620 , OPA1655 I am used to seeing a cap in series with t he negative input resistor on AC/audio op amp circuits. Why no such cap with this part? I also had another question…
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  • BUF634A: Output headroom?

    Resolved
    Part Number: BUF634A Other Parts Discussed in Thread: OPA1655 Please elaborate on the Output Headroom spec in the datasheet. Is this saying the Vpp of the output will be around 2V less potential on each the positive and negative supply - so with a +/-12V…
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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…
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  • [FAQ] Choosing the right audio op amps in context

    TI Thinks Resolved
    Choosing the right audio op amp in different contexts: Parts discussed in this thread: OPA167x , OPAx134 , OPA165x , OPA1622 , OPA160x , OPA1692 , OPA1611 , OPA1632 , With so many different audio op amps available from TI, it can be difficult to determine which one…

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