Opa1656 vs opa1612 forum audiophile. Dec 28, 2018 · I would like to see the OPA1656, a burr brown sound plus chip. 000 (DIY!) tube preamp with tube Mar 17, 2019 · The Vendor's Bazaar forum is for commercial offers and transactions. 5Vrms signal, 80-kHz measurement bandwidth. 25 V to ±18 V (4. My understand if noise isn’t a problem the opa1656 is great alternative to the opa1612. 25V to ±18V or (4. the ne5532 looks a bit harder, narrower and more direct, the other two a bit more relaxed and Mar 17, 2019 · I purchased 10 OPA1656's. Nov 30, 2021 · Stability should be considered especially with the wider bandwidth of the OPA1656. I'm waiting for OPA1656 and ADA4896 to try at I/V stage. I suggest the following reference - 994Enh Discret OpAmp SONIC IMAGERY LABS - SPARKOS LABS SS3606 - AOP 1612 - LM4562 May 15, 2022 · Buggle2 Riaa board. 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: 611Kb / 23P [Old version datasheet] Ultra-low-noise, low-distortion, FET-input, Burr-Brown audio operational amplifier OPA1662: 1Mb / 32P Dec 12, 2020 · Yes, Bruno said in the interview OPA1656 was superior, while you mentioned the discussion at ASR where the OPA1612 was said to test better. May 23, 2018 · Opa1656 and opa1612 without tweaking have better performance than almost any discrete solution. Are there any other The OPA1655 and OPA1656 (OPA165x) are Burr-Brown™ op amps designed specifically for audio and industrial applications, where maintaining signal fidelity is crucial. Dec 6, 2018 · Tone controls? DAC reconstruction filter? The better FET-input op-amps are expensive because they are laser-trimmed and prices can be crazy. I used 10 or 12 in my preamp rolling project - never a problem with . It offers exceptional performance in almost any audio application. Dual customzied solution will give unmeasurable distortion (possibly -180db). I felt a great improvement overall. Now, we run through a hand calculation to find the total noise of a simplified audio Mar 22, 2022 · OPA1612 (soic on dil adapter board), bi-polar from input to output, again a very good opamp, which to me "sounds more balanced" top to bottom than the LME, it is just as dynamic, but just a little less obvious in the bass leading edge because the mid-range seems a little more fleshed out rich and full bodied, highs are just as good as the LME. 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. Mar 17, 2019 · Benefit is lower dc offset and less distortion also high open loop gain also superior stability. (NOTE: We once owned a recording studio together back in the late 1970's through the early 1980's. OPA1612 is fuller sounding - especially lower midrange but also more dynamic. 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. OPA1656 Dec 10, 2021 · This is my first time doing anything DIY with audio. I would recommend OPA2134 or OPA134 and if you have money the OPA627 or OPA637. pdf (sorry, pasting the address makes a huge link) you use a ~50 ohm isolation resistor. OPA1656: 3Mb / 42P [Old version datasheet] OPA165x Ultra-Low-Noise, Low-Distortion, FET-Input, Burr-Brown™ Audio Operational Amplifiers REVISED SEPTEMBER 2022: This OPA1656 OPA from Texas Instrument offers very good performances for audio use. This feature accommodates the power supply constraints of many types of audio products. The Class D Purifi has rolled off treble and forward midrange that is its strong signature (by comparison, it sounds neutral/normal on its own when there is nothing to compare). Feb 11, 2021 · As Mark pointed out OPA1612 is a terrific sounding opamp and if you have problems with its bold mighty extreme low bass performance or with the extreme high resolution and unfiltered highs you can use other new opamps with a more gentle sound like OPA2209, OPA2189 etc. Sep 25, 2019 · The OPA165x operates over a very wide supply range of ±2. In the meantime we will wait for the customers feedback on the component values in order to check the stability of each op amp below using the OPA1656. the differences aren't huge, but big enough to make a change worthwhile. I's latest offering, the OPA1656. May 9, 2023 · Which of the two mentioned OP Amps (OPA1612 or OPA1656) is the better one, in a scientific point of view. The FET-input architecture achieves a low 2. Opa1656 has good phase response at high frequency. Aol 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. Standard opamp for that has pretty much become OPA1612. opa1655 , opa1656 SBOS901C – MARCH 2019 – REVISED SEPTEMBER 2022 An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications, Hi Ervin, Yes those devices are very popular, unfortunately I don't have any way to know for sure when they are back in stock. common mode voltage that I've measured on any op amp. 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. but the difference between opa2604 and LME49720 is much smaller than the difference between these two compared to the original ne5532. 4 Calculating Voltage Noise at the Output. It's a virtually unknown chip as when you search on Digi-Key it doesn't come up as soundplus. Several reference are used on forum. Both (I believe have Fet-inputs) There’s also 2189 CMOS audio op amp has impressive specs of an impressive was designed for MUX friendly DACs and multichannel dacs! 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. Other cheap ones on my radar - OPA2134PA, OPA1612, LM4562NA. 1 10 100 1000 1 10 100 1k 10k 100k 1M 10M 9ROWDJH1RLVH6SHFWUDO'HQVLW\ Q9 ¥+] Frequency (Hz) C006 Product Folder Sample & Buy Technical Documents Tools & Software Mar 17, 2019 · We tried OPA1612, OPA1656, NE5532, and Muses 8920 opamps in Rohm BD34301EKV Evaluation Board (which came with 5532's installed). This is just a theory. (or the 2156) The opamp has good phase margin and seems quite tolerant of sub-optimal layout. Jan 10, 2016 · I talked yesterday to my buddy Greg B. I don't care about listening tests or something else, just want to use the technical better one in my amp. Apr 10, 2019 · I have interested in low ESR Electrolytic Capacitors to power the Opa1612. 5 MHz LM4562, 55 MHz OPA2134, 8 MHz A 1 metre cable with polyethylene dielectric has its first resonance at 50 Jul 4, 2009 · Here’s a great article comparing opa2156 CMO vs opa1612. Tried putting in opa1612 today. 53 MHz gain bandwidth product, 24V/us slew rate. BTW, last year I crippled my €4. 6 fa/rtHz broadband current noise. The low voltage noise combined with the low current noise make this device great for low and high impedance applications such as a high gain microphone pre-amplifier. r/audiophile is a subreddit for the pursuit of quality audio reproduction of all forms, budgets, and sizes of speakers. >100mA output current. Feb 11, 2021 · According to the TI datasheets OPA1612 has less noise than OPA1656. I ended up staying with this one. MUSES8820 is the best, IMHO. I would have no problem staying with them, but I like tinkering. Transients are stronger, both rimshots of snare drum and big-band trumpets. PRODUCTION DATA. Jul 4, 2021 · The article linked below isn't the be-all and end-all on op amps tests, but very informative. The Texas Instruments OPA1656 has a specified temperature range from –40°C to +125°C and is offered in an 8-pin SOIC package. The OPA1656 is the industry’s lowest voltage noise high voltage CMOS on the market. Total Noise of OPA1656 vs OPA1612. As per datasheet Fig 7, OPA1656 achieves this pretty well with loads of 2k (or more) @ output voltage 3V(rms) OPA1612 achieves this flatness of THD+N curve , eg in inverting mode G=-1 (Fig. In all, I will say the changes are noticeable, but not earth shattering. I’m going to solder the IC to a soic to dip adapter then plug it into the the amp. I did an A/B comparison to LME47920 (metal cans), burson V5i, V6 and also the Sparkos Pro discrete op-amps on one of my DAC's. We would like to show you a description here but the site won’t allow us. Our primary goal is insightful discussion of home audio equipment, sources, music, and concepts. 10 kOhm - 10 MOhm Set 1 produces no visual deviation at all. Apr 6, 2020 · The OPA2134 is very ordinary, I consider it a side step to the NE5532. 1 kOhm - 1 MOhm 4). Dec 30, 2023 · Part Number: OPA1612 Other Parts Discussed in Thread: OPA1656 I'm up to, to design a 3rd or 4th order 20 Hz high pass filter with ultra low distortion. Dec 11, 2019 · The OPA1656 immediately raised my attention, plus there was/is a long thread about it on diyaudio. 9 mA of supply current to accommodate the power supply constraints of many types of audio products. I looked at the Slew Rate as my main 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? M500 SINAD is higher than DO300 with less op-amps. 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. But I would still like to see the OPA1656 tested. But that does not say anything about the SQ. 8. 9nV/rtHz broadband voltage noise. Since Bruno's MO is to test rather than rely completely on subjective impressions, I wondered whether he had done some different tests in which the OPA1656 excelled. 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 Jan 17, 2022 · It is hard to tell apart AHB2 vs 333 but easy to identify the Class D Purifi once we have heard all three on the same or specific songs. Best Regards, Chris Featherstone 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). 1F X7R on the backside with the shortest possible lead length. -131 dB THD+N at 1kHz, 600 ohm load, 3. Mar 17, 2019 · A quick snapshot of the OPA1656 performance specs: 2. 5 V to 36 V) on 3. The NE5532 is perfectly fine. I had no oscillations or instability with the OPA1656. Since I am not interested in the V6 Vivid Dual that it comes with. Other Parts Discussed in Thread: OPA1612, OPA1642, RC4136 I use these amplifiers for pro audio. Below, I have highlighted the components that could be adjusted if this the issue. Apr 8, 2021 · I tried OPA1622, OPA627 and OPA1612 at I/V stage and OPA1612 is clearly the best to my ears. • audio·phile: a person with love for, affinity towards or obsession with high-quality playback of sound and music. 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. ••• Nov 26, 2017 · thanks for your tips! i have tested the opa2604 and the LME49720 compared to the ne5532. May 10, 2022 · You don't have to use SA, distortion level obvious on oscilloscope screen. You retrieve so much details and trebble extension but could be a bit fatiguing. The output swing for Aol should be considered as it is different between the two devices. OPA627 is really bass forward but you lose details, clarity and energy. Currently, I require opamps in the DIP package. 9‑nV/√ Hz voltage noise density and 6‑fA/√ Hz current noise density, allowing for very-low noise performance in a wide variety 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. 7 pA/rthz) will multiply with the pickup resistance (varies quite a bit, say typical is 10 kOhm) to become the With that being said, there will not be a huge noise performance difference between OPA1656 (~4nV/rthz) vs OPA1678 (~5nV/rthz) when the thermal noise is already 11. My main attraction to them is a higher ripple current in the AC to “ power” the board onward as the opa1612 only requires low quiescent current of 3. 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. I repeated measurements a few times, using sets of resistors: 1). Taking advantage of a wide power supply range and mounted on a DIP8 bracket, it can replace many other models. 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. Composite amplifier is one of the best application with opa1656. Sep 6, 2023 · I was using opa1656 with fosi v3 ever since I got the uni. 100 Ohm - 100 kOhm, 3). Now they seems to have changed again to opa1612 in many places - maybe a suggestion to try ? I have tried ne5532, opa2604, lm4562 and opa1612 and I prefered LM 4562 in both Aiyima a07 and the tpa3251-based Aiyima a04. opa1655 , opa1656 SBOS901C – MARCH 2019 – REVISED SEPTEMBER 2022 An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications, Jul 4, 2009 · Marketing 101 by having one of the engineers on the diy threads because it creates interest (especially from spec crazy diy-ers who “need” the lastest and best specs and use “word of mouth” via the audiophile threads to push cost up by popular demand) They do outsource them to official distributors ie Mouser, Digi-Key but you have to buy them in bulk (we’re talking 100s to 1000s) and Mar 14, 2010 · Tubey, better late than never - I just replaced all NE5532 amps in Benchmark DAC1 with OPA1612 and play it so far for few hours. 9mA of supply current. It's a killer OpAmp, and better suited to non-inverting buffer duties than the OPA1612/2211. NE5532 is a very good amplifier especially for the price ($0. com with a TI insider involved. The different players sounded different. Dear all, aiming to keep THD+N figures constant over the audio frequency range. It appears that the Other Parts Discussed in Thread: OPA1612, OPA828. Mar 17, 2019 · The OPA1641 would be slightly better. It could sound pretty good, but one could get sound just as good from IC opamp designs. 5). For example, Aol for the OPA1656 with a 600 ohm load will have a linear output swing that is 1. I read on several forum the advantage to use specific AOP for the final stage of DAC or Amplifier. 5V to 36V) on 3. OPA1612 is a great amplifier, however, it is bipolar (input type) and when used immediately at the front-end of a guitar input, the input current noise (1. I think it's a matter of circuit design and implementation. I am planning to replace the NE5532 in my Burson Funk with the OPA1656. It has a very good dynamic range and a low level of harmonic distortion. Regarding the tone stack, if there is enough gain in the front-end, the input-referred noise may not be impacted by the resistances. OPA1656 sounded worst, Muses 8920 sounded best. It's best use as an alternative to opa1612 when noise is not a big concern. It could be very interesting to test their performance: - SNR - Bandwish - slew rate-. The op amp offers a temperature range of -40°C to +125°C and is available in an 8-pin SOIC package. 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 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). I've had the Burson V5i, and the V6vivid and I have no space to put a sparkos labs opamp single or dual channel. I also refurbish large format recording consoles. 4 nV/rthz. 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. For the case of Sep 17, 2023 · I was using opa1656 with fosi v3 ever since I got the uni. Some people have more recently started using OPA1656, which are very good, although they are a little less authoritative in the bass. Dynamics felt better, bass felt more defined and the upper midrange seems to have more air. CMRR is not a big issue. In note slyt630. 3V inside of each supply. OPA1656 - Better imaging / separation of instruments. Tested a lot of OP, including LME49720, OPA1612, OPA1642, MUSES8920 and MUSES8820. Part Number: OPA1612 Other Parts Discussed in Thread: OPA1622, OPA1688 Hello, I am considering the OPA1612 as a headphone driver replacement for JRC2114. Does anybody Sep 27, 2019 · The OPA1656 operates over an ultra-wide supply range of ±2. Soundstage and placement felt more solid. Mar 21, 2023 · The trade off would be noise vs stability. It has the most stable input capacitance vs. 7 of OPA1612 datasheet) Jul 5, 2006 · SQ was about the same as other ESS-based dacs in that class. He gives strong recommendations for some applications and also caveats about ill-informed op amp rolling. I prefered the sound of my DAC with the OPA1656's hands down even over the discrete op-amps. who builds large PA speaker systems. 9 v/µSec for a OPA1656 at isn't really that expensive for opa1656, opa1602, opa1612. He does test the TL072 against some more modern ones, but not the OPA1612 due to there being no DIP version I think. But $40-57 each. 10 Ohm - 10 kOhm, 2). IMHO the outcome was mostly decided by how the opamps responded to the RF coming out of the dac chip. Feb 11, 2021 · I'll look at it if you know of one amp using OPA1612 sounding audibly better than another amp using cheaper op amp in objective listening comparison. 6 mA but I know I’m in the Op amp thread so I don’t want to take the thread off topic. Mar 17, 2019 · OPA1656 rolling I tried in all cases to bypass the rails with a 0. ) He talked to me about OPA1611's versus OPA134's as well as the OPA1612's versus OPA2134's. Transparency got way better. Is the OPA1656 the correct opamp to use? I heard it was the best so that’s why I picked it. The OPA 627 is well over price and is bass heavy and it’s not worth the price you pay for it The OPA1612 and OPA827 are much better than any of these but these are SOIC and you’ll need an adapter with experience soldering skills. mhhryzikcibcanqypbhygxlsxdjqtpzczzfobibskbnp