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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: 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…
    • Answered

  • 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…
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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…
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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…
    • Resolved

  • OPA1632: Output balance problem (single to dif conversion for AD inputs)

    Part Number: OPA1632 Other Parts Discussed in Thread: OPA1655 Tool/software: Hello ! I get different p-p amplitude from the outputs.(check the red remarks 1860 vs 2120mV) I have checked following: 1) checked and doublechecked all resistors - nope…
    • Answered

  • 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 …
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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…
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  • OPA1642: Unexpected behavior in single supply circuit

    Resolved
    Part Number: OPA1642 Other Parts Discussed in Thread: TL072 , LM833 , , OPA1656 , OPA1655 , OPA2156 I've just started working with the OPA1642A, and I want to use it in a basic audio buffer circuit. I've done this with older parts for years (LM833, TL072…
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    • Answered

  • 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…
    • Resolved

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