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  • OPA1611: Why are these example DAC ckts set up with an attenuating last stage?

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    Part Number: OPA1611 Other Parts Discussed in Thread: PCM1792 , PCM1794A , OPA1637 , THS4561 , THS4131 , OPA1632 , OPA1692 I was looking at the example ckt in the OPA1611 datasheet (figure 35), and this, like several others, show the diff to single stage as…
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  • OPA891: OPA891适合做音频DAC I/V转换的运放吗？

    Resolved
    Part Number: OPA891 Other Parts Discussed in Thread: OPA1611 , Tool/software: 请问，OPA891适合做音频DAC I/V转换的运放吗？如下图把OPA1611替换成OPA891。谢谢。
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  • OPA1611: in combination with LME49600 and problem with capacitive load.

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    Part Number: OPA1611 Other Parts Discussed in Thread: LME49600 , LME49720 , OPA1612 , BUF634A , OPA1622 Hello, I'm working on a headphone amplifier project that use the circuit recommended in LME49600 datasheet. Only that I've replaced the LME49720 with OPA1612…
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  • OPA1611: Finding Open-loop transferfunctions of opamps and amplifiers

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    Part Number: OPA1611 Other Parts Discussed in Thread: LME49600 , LME49990 , OPA1612 , Hi, I am currently working on a high performance headphone amplifier. I have found a schematic online (I added the schematic as an attachment). In the schematic it can be…
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  • TINA/Spice/OPA1611: Phase Margin

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    Part Number: OPA1611 Other Parts Discussed in Thread: TINA-TI , , TIPD118 Tool/software: TINA-TI or Spice Models Hi, The result of an open loop analysis which is simulated with TINA-TI using the following schematic is shown, it seems that the phase margin…
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  • TINA/Spice/OPA1611: Does TINA can be used to simulate MFB bandpass filter?

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    Part Number: OPA1611 Other Parts Discussed in Thread: TINA-TI , Tool/software: TINA-TI or Spice Models Dear team, I was designing MFB bandpass filter. I chosen OPA1611. Here is my simulation result. For a MFB bandpass filter, it's gain at Fc(central frequency…
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  • OPA1611: No Output from OPA1611

    Part Number: OPA1611 Hello, We are utilizing the OPA1611 Op-amp for our senior design project with UCF. We have connected several OPA1611 to break out boards in order to bread board test our circuits. For each op-amp we are testing them with a very simple…
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  • TINA/Spice/OPA1611: TINA-TI transient simulation fails after reaching 90%

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    Part Number: OPA1611 Other Parts Discussed in Thread: TINA-TI , , THS4031 Tool/software: TINA-TI or Spice Models I am simulating a differential amplifier that uses composite amplifier techniques using an OPA1611 and THS4031, and I am looking at the step…
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  • OPA1611: Distortion vs load dependency

    Part Number: OPA1611 Other Parts Discussed in Thread: OPA1612 , OPA1622 We have a question for the OPA1611 amplifeir: and the graph of Figure 7. THD+N Ratio vs Frequency. It shows that amplifier distortions are higher for the load resistance of 600 Ohm than…
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  • TINA/Spice/OPA1611: getting a "circuit too big" when trying to simulate a circuit with more than 38 OPAs

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    Part Number: OPA1611 Other Parts Discussed in Thread: TINA-TI Tool/software: TINA-TI or Spice Models hi so i happen to need to simulate a circuit with over 50 OPAs in TINA TI, problem is, when i put over 38 OPAs in, i get a "circuit is too big"…
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