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  • OPA1654: replace mc33079 with opa 1654

    TI Thinks Resolved
    Part Number: OPA1654 hi i need to replace in my presonus preampli n.2 mc33079 with TI opa1654 sound plus jfet op ampli it is possible? other opsions? audio grade burr brown or what else.. maybe the new opa1689? thanks david

  • very low frequency oscillation with OPA1654

    Other Parts Discussed in Thread: OPA1654 Hi, my circuit has a strange behaviour that I can't explain (and get rid of) but I think there is a chance that the source of trouble is the circuit around an OPA1654. The circuit is a sensor signal amplifier…

  • TL974: Temp vs Ib characteristic graph

    TI Thinks Resolved
    Part Number: TL974 Other Parts Discussed in Thread: OPA1654 Hi, Do you have any Temp vs Ib characteristic graph for TL974, like below, (OPA1654 figure23) Thanks Muk
    • Answered

  • RE: TLV320ADC6140: TLV320ADC6140 & ADC6140EVM-PDK Setup & Comparison to PCM1865

    Resolved
    Fair enough, thank you for the additional information about the desire to further increase dynamic range of the front-end. OPA1604 is our lowest noise quad, with OPA1664 in 2nd. The OPA1654 is a good quality CMOS offering as well. There are more choices…
    • Answered

  • RE: OPA1664: Output voltage is significantly reduced from pre-amplifier when capacitor is used in the microphone output.

    Resolved
    Hello Tapas, Adding a coupling capacitor in the signal path before the 4th stage will remove the offset from the previous 3 stages. Then, only the offset of the 4th stage will be present at the output of the signal chain. The coupling capacitor at the…

  • PCM3168A: Power-on sequence can cause SDA to stay low while in reset

    TI Thinks Resolved
    Part Number: PCM3168A Other Parts Discussed in Thread: OPA1654 We are using a PCM3168A CODEC in our design and we are having some issues. When powering-on (or power cycled), there is a chance that the CODEC will hold SDA low while in reset. We are…

  • RE: OPA4188: Strange sine distortion

    Thanks for your answer, I tried your suggestions but the results are the same. I simplified the circuit to a simple follower with one power supply and a sinus input with an offset of 5V: Instead of the OPA4188 I used an OPA188 to avoid potential…

  • RE: How in the world can TI obsolete the Nat Semi LM837? This op amp has outstanding value for money in audio applications. With it's linearizd output stage it will typical give 0.001% THD to 200 K and you get 4 op amps for about 30 cents. What to su...

    Well Jeff, we use about 100K pcs of LM837 per year. Some of those op amps you mention are nice op amps but the cynical engineer might notice that they are three to four times the price of the LM837 and one might infer that is the true reason for…
    • Answered

  • RE: TLE2064: What is max current for all channels simultaneously?

    Resolved
    OPA4172 OPA4132 OPA1654 LM837 LF347 Order now Order now Order now Order now Order now Online datasheet Online datasheet Online datasheet Online datasheet Online datasheet Datasheet Datasheet …
    • Answered

  • RE: OPA2134 replacement recommendations please

    Resolved
    Hi Willie, I don't see that we have one op amp that meets all of your criteria directly, although the TLE2082 looks like a really good choice and possibly the best fit. Based on your key functional requirement for the Iccq to be less than 10mA for…

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