Opa1656 vs opa1612 reddit audio. LME49720 vs OPA1612 vs Muses02 Mar 17, 2019 · Benefit is lower dc offset and less distortion also high open loop gain also superior stability. Jan 10, 2016 · I talked yesterday to my buddy Greg B. 5Vrms signal, 80-kHz measurement bandwidth. (NOTE: We once owned a recording studio together back in the late 1970's through the early 1980's. Also audio opamps may have enough input offset voltage to saturate the output for such high gains - if the input offset is +/-3mV and the gain is 1000, the output offset is +/-3V, or maybe much Dec 9, 2019 · Technically speaking, it's really hard to beat opamps like AD797, AD8599, OPA1612, OPA1656, so it might be safer to use one of these over the "exotic" ones, unless swapping opamps is really fun for you and you have enough money to spend on this hobby. Sep 27, 2019 · The high bandwidth and high open-loop-gain design of the OPA1656 provides a low distortion of 0. At this point noise and ultra low noise supplies might be the last area I should put more effort into for this interface. Jul 30, 2021 · If I could also request test of: OPA1642 ~ 2 Euro OPA1656 ~ 2. Shameless plug I just highlighted the OPA1656 in my latest application note. Standard opamp for that has pretty much become OPA1612. The OPA1656 immediately raised my attention, plus there was/is a long thread about it on diyaudio. alongside with some aliexpress el`cheapos for like 2 buck a piece instead of 7. Dec 28, 2018 · Chiba Prefecture, Japan: Windows 11 Pro 64 bit Audio Dedicated DIY Silent PCs, JRIver, etc. Sep 14, 2021 · This leads me to believe there could be an issue caused by the back-to-back diodes across the inputs of bipolar (LME49990, OPA1612) and CMOS op amps (OPA1656). Jan 19, 2023 · - LMP8672 (probably discontinued) - OPA1612 (which is barely available in SOIC8 at the moment) - ADA4898-2 - OPA1656 (if the circuit around it is right, it performs like opamps which are much more expensive, because of the FET Input stage it doesn't produce so much noise even with higher resistor values on its inputs) - AD8599 ( not a very fast opamp but therefore it is easy to get it stable Mar 17, 2019 · To start, OPA1656 is definitely not a replacement for OPA1622, the two parts were designed for with very different applications in mind. For example, Aol for the OPA1656 with a 600 ohm load will have a linear output swing that is 1. CMRR is not a big issue. May 23, 2018 · Opa1656 and opa1612 without tweaking have better performance than almost any discrete solution. Jun 5, 2023 · The OPA1642 is significantly inferior to the OPA1612 in many regards (GPW product, output drive, distortion vs output load, input voltage noise for example). It offers exceptional performance in almost any audio application. The OPA1655 and OPA1656 (OPA165x) are Burr-Brown™ op amps designed specifically for audio and industrial applications, where maintaining signal fidelity is crucial. Oct 2, 2020 · I want to drive a non-inverting OPA1656 from the wiper of a volume pot -- which means a range of source resistance for the OPA1656 from 0 to <del>Rpot/2<del> Rpot/4. -131 dB THD+N at 1kHz, 600 ohm load, 3. who builds large PA speaker systems. One S300iu integrated amplifier | Stereophile. 5 MHz LM4562, 55 MHz OPA2134, 8 MHz A 1 metre cable with polyethylene dielectric has its first resonance at 50 MHz, a 1. 3V inside of each supply. The output swing for Aol should be considered as it is different between the two devices. Opa1656 has good phase response at high frequency. OPA1656 also has a pole-zero pair in the open loop gain curve to boost the open loop gain at audio frequencies (hence the 53 MHz gain bandwidth product). 7 of OPA1612 datasheet) Audio crossover network: Overall noise figures may benefit from higher internal signal voltages (Douglas Self: "The Design of active Crossovers"). 000035% (-129 dB) at 20 kHz and improves audio signal fidelity across the full audio bandwidth. 00005% at 1 kHz. I suggest the following reference - 994Enh Discret This OPA1656 OPA from Texas Instrument offers very good performances for audio use. com In no case did I have too high expectations regarding the sound Sep 25, 2019 · Texas Instruments OPA165x Ultra-Low-Noise Audio Operational Amplifiers are designed specifically for audio and industrial applications where maintaining signal fidelity is crucial. And ADA4627, which appears intended as a direct replacement (a decompensated ADA4637 exists as well). 9nV/√Hz voltage noise density and 6fA/√Hz current noise density. It appears that the Mar 17, 2019 · OPA1656: High-Performance CMOS Audio Op Amp. Also the OPA1612 does have the highest quiescent over the other opamps we're talking about it will be the hottest. The question is rather moot anyway. It could be very interesting to test their performance: - SNR - Bandwish - slew rate -. Feb 17, 2023 · I'd go with the LM4562 (= LME49720) instead. It has a very good dynamic range and a low level of harmonic distortion. It's best use as an alternative to opa1612 when noise is not a big concern. The OPA1642 has the JFET input stage- thus reducing the input current noise- reduced common mode input distortion and sensitivity to source impedances, and lower standing current going for Jul 26, 2020 · I agree with you, OPA1612 is really good regarding details resolution, OPA1656 has the best of both world : ultra high definition regarding micro details and very neutral but still warm. 6 fa/rtHz broadband current noise. • Audio Effects Processors • Musical Instruments • A/V Receivers • DVD and Blu-Ray™ Players • Car Audio Systems 3 Description The OPA1652 (dual) and OPA1654 (quad) FET-input operational amplifiers achieve a low 4. I have a circuit with two OPA1656's and it so happens that one offset is subtracted from another and almost cancels - in LTspice. Dec 30, 2023 · I don't have the books you mentioned but I do have a book called Small Signal Audio Design by Douglas Self. ) He talked to me about OPA1611's versus OPA134's as well as the OPA1612's versus OPA2134's. I expect to sell of the OPA1656 ? 10 million ? 100 million ? I would like to replace the RC4558 • audio·phile: a person with love for, affinity towards or obsession with high-quality playback of sound and music. 9nV/rtHz vs. Transparency got way better. When we developed the OPA1656, this was also a major design target for us, and the designer and myself spent quite awhile in the lab with previous CMOS audio op amps (specifically OPA1652 and OPA1688) hunting for sources of input capacitance Mar 17, 2019 · The OPA1641 would be slightly better. 144dBc=0. I hear OPA828 is the new version of the OPA627, so I may try that one out. OPA1612 sounds better than any transistor preamp I've ever heard and better then my own 6N6P 2 case -no barrels hold- 36kg monster preamp with a 100% double blind test win rate. OPA1656 sounded worst, Muses 8920 sounded best. 3 MHz. Feb 11, 2021 · According to the TI datasheets OPA1612 has less noise than OPA1656. The FET-input architecture achieves a low 2. May 9, 2023 · Which of the two mentioned OP Amps (OPA1612 or OPA1656) is the better one, in a scientific point of view. OPA1656 had respectable slew rate without slew boosting so I opted to forego that circuitry in the audio part. I hesitate to recommend those without simulating the circuit. • Professional audio mixer/control surface • Guitar amplifier and other music instrument amplifier • A/V receiver • Bookshelf stereo system • Professional audio amplifier • DJ equipment • Turntable • Special function module 3 Description The OPA1655 and OPA1656 (OPA165x) are Burr-Brown™ op amps designed specifically for audio Mar 17, 2019 · The OPA1656 has 6dB more open loop gain at audio frequencies, hence the better distortion. Even AD797 or OP627 cant hold a candle vs OPA1612 in terms of SQ - the difference is HUGE! My preamp sounds best with OPA1612 for gain and OPA2192 as buffer. Some will point out the OPA1612 (which is even better) or the OPA1656. Products Precision op amps (Vos<1mV) INA1620 — High-fidelity audio operational amplifier with integrated thin-film resistors and EMI filtering OPA130 — Single, 1-MHz, 20-pA bias current, 530-µA power, FET operational amplifier OPA131 — Single, 4-MHz, 50-pA bias current, 750-µA power, FET operational amplifier OPA140 — Single-channel, 11-MHz, low-noise 36-V JFET precision operational Part Number: OPA1656 Other Parts Discussed in Thread: OPA2134, OPA2604 The OPA1656 is the industry’s lowest voltage noise high voltage CMOS on the market. Chip Amps. 5 Euro OP275 ~ 3 Euro OPA1612 ~ 6 Euro According to specs I would think the OPA1642 would be one of the best compromises cost vs performance wise. He discusses the Sallen and Key High Pass filter in this book and also the distortion. Soundstage and placement felt more solid. I felt a great improvement overall. Mar 17, 2019 · blue spectrum - 2 x 8 parallel OPA1642 , green spectrum - 2 x 2 parallel OPA1642 orange spectrum - 2 x 8 parallel OPA1656 , brown spectrum - 2 x 2 parallel OPA1656 Based on these measurements I expect the noise of a single OPA1656 to be 39nV/rtHz at 10Hz. IMHO the outcome was mostly decided by how the opamps responded to the RF coming out of the dac chip. PRODUCTION DATA. r/audiophile is a subreddit for the pursuit of quality audio reproduction of all forms, budgets, and sizes of speakers. Dual customzied solution will give unmeasurable distortion (possibly -180db). Mar 17, 2019 · About OPA1656 DC output offset: depending on gain, a low level circuit with the OPA1656 can show a few mV as output offset. I also really liked the OPA627 that I had in an audio-gd dac years ago. I would not classify the OPA1656 as a high speed amp in this context. Jun 5, 2023 · After working with some OPA1612 on my recent Topping PA5 D01 Module replacement project (at ASR), a friend sent me a few OPA1612 opamps he ordered when they were in stock since i couldnt get them anywhere. In that regard, a 5532 is all you'll ever need as Douglas Self proclaims. Of course that is because in LTspice all instances of the device are identical. common mode voltage that I've measured on any op amp. Mar 17, 2019 · We tried OPA1612, OPA1656, NE5532, and Muses 8920 opamps in Rohm BD34301EKV Evaluation Board (which came with 5532's installed). Aol Sep 6, 2023 · I was using opa1656 with fosi v3 ever since I got the uni. We would like to show you a description here but the site won’t allow us. com with a TI insider involved. The LME49860 is another option. Jan 27, 2024 · OPA1656 instead of OPA1612 by thuanth » January 27th, 2024, 2:57 pm I'm thinking of building a couple of a24 boards and want to try T. How much does T. It has the most stable input capacitance vs. Application Report Understanding Op Amp Noise in Audio Circuits Tyler Noyes, Tamara Alani ABSTRACT One of the greatest design challenges when building a high fidelity audio circuit is how to reduce the total system Mar 17, 2019 · As compared with the OPA1656 which is 24V/us. It might require more capacitance in the LPF of the I/V stage to keep it happy Vs the others. If a transient causes the op amp inputs to be pulled apart, the differential input voltage forward-biases those diodes causing a large input bias current. Hello everybody, I read on several forum the advantage to use specific AOP for the final stage of DAC or Amplifier. 1/f corners: OPA1612 ---- 10 Hz OPA1642 ---- 20 Hz OPA1656 ---- 1 kHz OPA2162 ---- 1 kHz It also looks like the OPA1642 and OPA2162 are not happy driving 600 ohms, but the Jun 8, 2023 · The OPA1656/1655 released after the OPA828 are also excellent enough to dispel the image of past CMOS input. There is no practical audio program material which will have 24dBu (which is what 17. TI has characterized the THD vs Rs for a lot of its recent devices, but alas not the OPA1656 (at least that I could find). OPA1622 was targeted specifically for headphone applications, while OPA1656 is a more general purpose device meant to address analog signal processing in line level audio circuits. My OP1656 OpAmp Review. When we developed the OPA1656, this was also a major design target for us, and the designer and myself spent quite awhile in the lab with previous CMOS audio op amps (specifically OPA1652 and OPA1688) hunting for sources of input capacitance variation. Nov 30, 2021 · Stability should be considered especially with the wider bandwidth of the OPA1656. Aug 24, 2012 · i tryed lme49722 opa2134 and opa1612 ,--. OPA1655 THD=-114. Tried putting in opa1612 today. >100mA output current. 53 MHz gain bandwidth product, 24V/us slew rate. Mar 17, 2019 · A quick snapshot of the OPA1656 performance specs: 2. It's a killer OpAmp, and better suited to non-inverting buffer duties than the OPA1612/2211 • Professional audio mixer/control surface • Guitar amplifier and other music instrument amplifier • A/V receiver • Bookshelf stereo system • Professional audio amplifier • DJ equipment • Turntable • Special function module 3 Description The OPA1655 and OPA1656 (OPA165x) are Burr-Brown™ op amps designed specifically for audio Mar 17, 2019 · For audio use, I see no reason to buy OPA627 when you have OPA827, OPA828, OPA164x, and OPA1656. ->Software Crossover EKIO->Multi-Channel OKTO DAC8PRO->multiple amplifiers->direct to SP drivers of fully renovated YAMAHA NS-1000 (not NS-1000M!)+FOSTEX T925A (L&R)+YAMAHA YST-SW1000 (L&R): ACCUPHASE E-460, YAMAHA A-S3000, A-S301, SONY TA-A1ES, ONKYO DAC-1000, OPPO SONICA DAC, KORG DS-DAC-10 , IEC 60268 Feb 17, 2023 · The OPA1622 is a slow device compared to the OPA1612/OPA1656. Vout= 8V(rms). Mar 9, 2023 · SMSL SU-10 vs M500 MKIII vs DO300 21 vs 9 vs 11 dual op-amps OPA1612 (accoring to the spec from smsl-audio) What is the Op-amps doing in that? Facebook Reddit Dec 6, 2018 · OP, with audio op-amps most EE's are datasheet designers- using a few listed numbers to compare parts. Composite amplifier is one of the best application with opa1656. Going beyond the datasheets, even as far back as 1987 it was known op-amps have many important traits not characterised on their datasheets. Mar 17, 2019 · Azul headphone amp (BAF 2019) uses an OPA1611 + LH0033 composite. 9‑nV/√ Hz voltage noise density and 6‑fA/√ Hz current noise density, allowing for very-low noise performance in a wide variety Feb 11, 2021 · looks very similar to the eighth image from post #2 of Bel Canto's S300i/S300iu - driven by dual mono Icepower amplifier modules with switch mode power supply - go to Inside the Bel Canto S300i integrated amplifier | Audiokarma Home Audio Stereo Discussion Forums and Bel Canto e. He does test the TL072 against some more modern ones, but not the OPA1612 due to there being no DIP version I think. 8 bucks for a genuine part. 4nV/rtHz both flat. Other cheap ones on my radar - OPA2134PA, OPA1612, LM4562NA. Without scoping the outputs or measuring the DAC there's no telling if OPA1612 achieves this flatness of THD+N curve , eg in inverting mode G=-1 (Fig. Review. Mar 17, 2019 · It has the most stable input capacitance vs. OPA1656 Mar 17, 2019 · We tried OPA1612, OPA1656, NE5532, and Muses 8920 opamps in Rohm BD34301EKV Evaluation Board (which came with 5532's installed). The OPA165x Op Amps offer a FET-input architecture that achieves a low 2. The OPA1656 has very good THD + N. The OPA2156 has amazingly good distortion as well, you just might want to load the output a little less than a 1656. I've had an OPA1612 lose its mind in a filter circuit where an LME49720 worked just fine. 5 metre cable at 33. --lme49722 lme4562 lm4562 opamp is very good sound ,higher ratings than opa2134 -but not as . Some people have more recently started using OPA1656, which are very good, although they are a little less authoritative in the bass. 5-nV/√Hz noise density with an ultra-low distortion of 0. I don't care about listening tests or something else, just want to use the technical better one in my amp. May 15, 2022 · Vendors Audio Poutine Holton Precision Audio Elekit XRK Facebook Twitter Reddit Pinterest Tumblr Amplifiers. 1. Mar 17, 2019 · OPA1656 is less noisy than the OPA827, 2. I routinely use OPA1656 and related on adapters without any issues. Jul 5, 2006 · SQ was about the same as other ESS-based dacs in that class. It could sound pretty good, but one could get sound just as good from IC opamp designs. Dec 11, 2019 · Normally you'd regularily search in the manufacturers new product listings first for any new interesting products. I's latest offering, the OPA1656. Mar 17, 2019 · The good news is that in audio, impedance levels are relatively low so parasitics need to be larger to have a bad effect, and most audio opamps are not really high speed. See attached, Jan is using the opamp for his project MRK 3 input box (input attenuation & gain) prior an ADC for measurement purposes :redhot: Currently it is not clear, how the measurement (customer) setup was really May 10, 2022 · Many audio opamps have GBW of 10 to 20MHz or so, so at a gain of 1000 the bandwidth will have dropped to 10--20kHz - completely inadequate for audio. Feb 11, 2021 · I think the problem I'm seeing with the OPA2156, and to a lesser extent the OPA1656 is that the 1/f knee for the noise is much higher than for the OPA1612 and OPA1642. Feb 11, 2021 · Dont make me laugh, if you can't hear the difference 5532 vs OPA1612 than you should not be very concerned about SQ (in your case). Taking advantage of a wide power supply range and mounted on a DIP8 bracket, it can replace many other models. 75V peak corresponds to) at 20kHz. But that does not say anything about the SQ. Mar 17, 2019 · Also, I typically preferred simplicity in the op amps I developed. 9‑nV/√ Hz voltage noise density and 6‑fA/√ Hz current noise density, allowing for very-low noise performance in a wide variety The OPA1655 and OPA1656 (OPA165x) are Burr-Brown™ op amps designed specifically for audio and industrial applications, where maintaining signal fidelity is crucial. It'll deliver 75mA RMS into a 32 ohm load; that is 180 mW which is quite a bit greater than the rated maximum shown in post #162. (If I am not wrong OPA1656 is a really modern OP Amps from March 2019 vs 2017 for the OPA1692). Several reference are used on forum. Running higher signal voltages through OPA1656 or 1612, for eg. Our primary goal is insightful discussion of home audio equipment, sources, music, and concepts. The applications that slew rate limiting is important to take into account is using the device in non-audio applications. 9nV/rtHz broadband voltage noise. i expected them to put some Jul 4, 2021 · The article linked below isn't the be-all and end-all on op amps tests, but very informative. This device features excellent output current drive capability, offering rail-to-rail output swing to within 250 mV of the power supplies with a 2 kΩ Sep 14, 2021 · The LM4562 is an exception, but otherwise it are the fast op-amps that JRA has trouble with: Misbehaving: OPA1656, gain-bandwidth product 53 MHz LME49990, 110 MHz OPA1612, 40 MHz Behaving well: OPA2604, 20 MHz OPA627, 16 MHz OPA2107, 4. the best sounding is OPA1612 ,not for driving headphones -low output current drive ,3ma current consumption ---then opa2134 the best all around as preamplifier it can be used at high gain 6-10 times,very good sounding and Musical,good for biassing in class A. The OPA1652 and OPA1654 op amps offer rail- Feb 11, 2021 · The next op-amp I am planning to try is the OPA1612 but perhaps the DAC is the limiting factor and perhaps the measurements will look very similar to the OPA2134 even if the OPA1612 is a really good op-amp. Dynamics felt better, bass felt more defined and the upper midrange seems to have more air. My first set of separate OpAmps, ushering my foray into the brave new world of OpAmmetryLoL Dry, crisp, analytical and non-intrusive (as compared to the bold NE5532) is what I would describe this opamp as. . 000196% I recently learned that an OP-AMP called OPA837 was released. I used though the better TIs in output stages of middle class DACs as these benefitted from a more round /warm presentation with less details, as that masked their weaknesses and in fact OPA1656 1/2 OPA1656 Input Output Pad Product Folder Order Now Technical Documents Tools & Software Support & Community An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications, intellectual property matters and other important disclaimers. Craig Mar 17, 2019 · Here is a copy paste of the result for OPA1656 OPA1656 In the past I have to say I prefered widely the AD precise sound vs the softer traditional TI sound. Apr 8, 2021 · So there is a huge possibility of combinations) But I found my happiness as follows: - 5 X OPA1612 (Bi polar OP amps work generally well with DACs) - 2 X OPA1656 (They are CMOS op amps but I really love their signature, very natural with a flat response and great soundstage). pcybodbuhnanzghkaaotjuyskupxfwotzdsvcxthzlfipmdfktxrid