Opa1656 vs opa1612 forum. Psychic contributors here now . 9 mA of supply current to accommodate the power supply constraints of many types of audio products. Mar 17, 2019 · A quick snapshot of the OPA1656 performance specs: 2. 9mA of supply current. Standard opamp for that has pretty much become OPA1612. Now, we run through a hand calculation to find the total noise of a simplified audio 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 diyaudio forum might be better suited for posing the question. 25V to ±18V or (4. com with a TI insider involved. File Size: 611Kbytes. I've had the Burson V5i, and the V6vivid and I have no space to put a sparkos labs opamp single or dual channel. Now, we run through a hand calculation to find the total noise of a simplified audio 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 6, 2018 · I don't think you can "get into it" here, it quickly degrades to psychoacoustics and audiophoolery compared to science. It could sound pretty good, but one could get sound just as good from IC opamp designs. The OPA1656 is the industry’s lowest voltage noise high voltage CMOS on the market. Jul 5, 2006 · SQ was about the same as other ESS-based dacs in that class. 9‑nV/√ Hz voltage noise density and 6‑fA/√ Hz current noise density, allowing for very-low noise performance in a wide variety Total Noise of OPA1656 vs OPA1612. The OPA827 for example has superior load drive,much lower distortion and miniscule DC offset. common mode voltage that I've measured on any op amp. I suggest the following reference - 994Enh Discret OpAmp SONIC IMAGERY LABS - SPARKOS LABS SS3606 - AOP 1612 - LM4562 Mar 17, 2019 · The Vendor's Bazaar forum is for commercial offers and transactions. OPA1612 is fuller sounding - especially lower midrange but also more dynamic. 5). Tested a lot of OP, including LME49720, OPA1612, OPA1642, MUSES8920 and MUSES8820. 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. 53 MHz gain bandwidth product, 24V/us slew rate. Aol Mar 17, 2019 · The OPA1641 would be slightly better. It's best use as an alternative to opa1612 when noise is not a big concern. 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. Mar 17, 2019 · I purchased 10 OPA1656's. 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. 5 V to 36 V) on 3. 10 Ohm - 10 kOhm, 2). I also refurbish large format recording consoles. (OPA1612 vs OPA1656) before production We would like to show you a description here but the site won’t allow us. 4 Calculating Voltage Noise at the Output. Dear all, aiming to keep THD+N figures constant over the audio frequency range. BTW, last year I crippled my €4. From what I know the OPA1656 is currently the highest-spec audio grade standard opamp that TI offers. Close to zero DC mv at its output would enable removal of the dreaded electrolytic coupling caps which will definitely lower colouration and improve sound quality. Jan 21, 2022 · You have answered another one of my questions before I ask - input impedance - I was reading earlier about OPA1656 vs OPA1612, and bipolar vs FET. It could be very interesting to test their performance: - SNR - Bandwish - slew rate-. So you'd be "degrading" the performance by going that route (even though both are excellent). Dec 28, 2018 · I would like to see the OPA1656, a burr brown sound plus chip. It appears that the OPA1611/2 have a lower noise voltage, wider bandwidth and higher slew rate than the OPA134 and OPA2134's. This feature accommodates the power supply constraints of many types of audio products. 9‑nV/√ Hz voltage noise density and 6‑fA/√ Hz current noise density, allowing for very-low noise performance in a wide variety 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. 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 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 Total Noise of OPA1656 vs OPA1612. 9nV/rtHz broadband voltage noise. Some people have more recently started using OPA1656, which are very good, although they are a little less authoritative in the bass. I prefer the opa2211 over the opa1612 (same chip but with less better specs). 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. Sep 27, 2019 · The OPA1656 operates over an ultra-wide supply range of ±2. 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! Feb 28, 2021 · The new breed of TI J-Fet opamps offer superior performance to that old soldier the OPA2134. Soundstage and placement felt more solid. The op amp offers a temperature range of -40°C to +125°C and is available in an 8-pin SOIC package. You can dig on the Internet and find modern op-amp test results, but it quickly crosses over into sonic character and subjective opinion. IMHO the outcome was mostly decided by how the opamps responded to the RF coming out of the dac chip. 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. Mar 17, 2019 · The OPA1641 would be slightly better. I read on several forum the advantage to use specific AOP for the final stage of DAC or Amplifier. 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. 5 MHz LM4562, 55 MHz OPA2134, 8 MHz A 1 metre cable with polyethylene dielectric has its first resonance at 50 MHz, a 1. 6 mA but I know I’m in the Op amp thread so I don’t want to take the thread off topic. The different players sounded different. In note slyt630. Joined Dec 21, 2020 Messages 1,924 Likes 2,847. Jan 27, 2024 · The OPA1612 has lower noise and distortion than OPA1656. 100 Ohm - 100 kOhm, 3). 10 kOhm - 10 MOhm Set 1 produces no visual deviation at all. PRODUCTION DATA. Are there any other May 10, 2022 · You don't have to use SA, distortion level obvious on oscilloscope screen. Compare the datasheets. I think it's a matter of circuit design and implementation. i expected them to put some Sep 25, 2019 · The OPA165x operates over a very wide supply range of ±2. Joined Feb 24, 2016 Messages 10,260 Likes 16,337 Location uk, taunton. FYI I'm about to order an Audiophonics HPA-S400ET with OPA1612 instead of May 19, 2017 · maybe modern production 3886 are all above average? the designs seem to take the 'typical' GBW spec as the effective minimum My guesstimate puts the safe with production variation margin local closed loop gain corner as low as 100kHz for LM3886 with a greater than 4:1 range designing for stable extra loop gain from the nice input op amp really doesn't give much 20 kHz added safe composite loop Jul 4, 2009 · Here’s a great article comparing opa2156 CMO vs opa1612. Jan 28, 2018 · I had the chance to gather up a selection of opamps from my parts bin, including BB OPA2604, OPA637, AD823, LME49860, JR4556, Muses8820 and 8920, and compare them against each other along with a Burson V6 Classic (thanks to them for sending me an evaluation). Other Parts Discussed in Thread: OPA1612, OPA1642, RC4136 I use these amplifiers for pro audio. But that does not say anything about the SQ. Description: Ultra-low-noise, low-distortion, FET-input, Burr-Brown audio operational amplifier. 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. Other Parts Discussed in Thread: OPA1612, OPA828. ••• Jan 10, 2016 · He talked to me about OPA1611's versus OPA134's as well as the OPA1612's versus OPA2134's. It offers exceptional performance in almost any audio application. alongside with some aliexpress el`cheapos for like 2 buck a piece instead of 7. Dual customzied solution will give unmeasurable distortion (possibly -180db). 000 (DIY!) tube preamp with tube . The OPA1642 is “one step down” but still very highly rated, and it is JFET-input which should give a low enough DC-offset to be used directly in this kind of application. Is the OPA1656 the correct opamp to use? I heard it was the best so that’s why I picked it. Nov 30, 2021 · Stability should be considered especially with the wider bandwidth of the OPA1656. The Texas Instruments OPA1656 has a specified temperature range from –40°C to +125°C and is offered in an 8-pin SOIC package. 6 fa/rtHz broadband current noise. Welcome to r/guitar, a community devoted to the exchange of guitar related information. 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. Jul 4, 2009 · The Opa1656 has a much wider and better soundstage. Feb 11, 2021 · According to the TI datasheets OPA1612 has less noise than OPA1656. 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. I’m going to solder the IC to a soic to dip adapter then plug it into the the amp. Dec 10, 2021 · This is my first time doing anything DIY with audio. NE5532 is a very good amplifier especially for the price ($0. Regarding the tone stack, if there is enough gain in the front-end, the input-referred noise may not be impacted by the resistances. Part Number: OPA1612 Other Parts Discussed in Thread: OPA1622, OPA1688 Hello, I am considering the OPA1612 as a headphone driver replacement for JRC2114. CMRR is not a big issue. Apr 6, 2020 · The OPA2134 is very ordinary, I consider it a side step to the NE5532. But I would still like to see the OPA1656 tested. 5Vrms signal, 80-kHz measurement bandwidth. -131 dB THD+N at 1kHz, 600 ohm load, 3. Since I am not interested in the V6 Vivid Dual that it comes with. The FET-input architecture achieves a low 2. 25 V to ±18 V (4. pdf (sorry, pasting the address makes a huge link) you use a ~50 ohm isolation resistor. I prefered the sound of my DAC with the OPA1656's hands down even over the discrete op-amps. 4 nV/rthz. 8 bucks for a genuine part. Opa1656 has good phase response at high frequency. My understand if noise isn’t a problem the opa1656 is great alternative to the opa1612. Mar 17, 2019 · We tried OPA1612, OPA1656, NE5532, and Muses 8920 opamps in Rohm BD34301EKV Evaluation Board (which came with 5532's installed). 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. It has the most stable input capacitance vs. Jul 4, 2021 · The article linked below isn't the be-all and end-all on op amps tests, but very informative. Currently, I require opamps in the DIP package. Tried putting in opa1612 today. If you have guitar related questions, start with the "search" field at the top of the page. I am planning to replace the NE5532 in my Burson Funk with the OPA1656. Does anybody 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. Dynamics felt better, bass felt more defined and the upper midrange seems to have more air. Several reference are used on forum. 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. OPA1656 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, Mar 17, 2019 · Benefit is lower dc offset and less distortion also high open loop gain also superior stability. 5 metre cable at 33. 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. It's a virtually unknown chip as when you search on Digi-Key it doesn't come up as soundplus. Page: 23 Pages. I don't care about listening tests or something else, just want to use the technical better one in my amp. For example, Aol for the OPA1656 with a 600 ohm load will have a linear output swing that is 1. 5V to 36V) on 3. Transients are stronger, both rimshots of snare drum and big-band trumpets. >100mA output current. Two cases were evalutated – in a Mar 17, 2019 · We tried OPA1612, OPA1656, NE5532, and Muses 8920 opamps in Rohm BD34301EKV Evaluation Board (which came with 5532's installed). Sep 6, 2023 · I was using opa1656 with fosi v3 ever since I got the uni. It's a killer OpAmp, and better suited to non-inverting buffer duties than the OPA1612/2211. May 9, 2023 · Which of the two mentioned OP Amps (OPA1612 or OPA1656) is the better one, in a scientific point of view. This is a forum where guitarists, from novice to experienced, can explore the world of guitar through a variety of media and discussion. The OPA1655 and OPA1656 (OPA165x) are Burr-Brown™ op amps designed specifically for audio and industrial applications, where maintaining signal fidelity is crucial. 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. OPA1656 sounded worst, Muses 8920 sounded best. Aug 3, 2024 #201 Buckeye Amps said: Sticking with the OPA1656. 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. 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. The output swing for Aol should be considered as it is different between the two devices. 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, 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 Part #: OPA1656. I felt a great improvement overall. I repeated measurements a few times, using sets of resistors: 1). 1 kOhm - 1 MOhm 4). Ha ha it's funny because I'm a wide and far reached detailed and accurate fanboy and some people find too many details to be annoying. He gives strong recommendations for some applications and also caveats about ill-informed op amp rolling. He does test the TL072 against some more modern ones, but not the OPA1612 due to there being no DIP version I think. Download. I looked at the Slew Rate as my main 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. Transparency got way better. Jul 3, 2019 · Forum Donor. Apr 10, 2019 · I have interested in low ESR Electrolytic Capacitors to power the Opa1612. Composite amplifier is one of the best application with opa1656. The Opa1612 is the audio version so they made the specs slightly worse. MUSES8820 is the best, IMHO. 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. Aug 3, 2024 · Forum Donor. 0:00 OPA1656(EQ) OPA2211( voltage follower)1:56 OPA2211 OPA1656オペアンプ回路のノイズ特性として、信号源の抵抗が大きい場合は、FET入力タイプが推奨されると lpf :opa1656 -----一開聲 音場唔大 深度就ok 中低明顯多 模擬感大於opa1612/22 個聲 延伸高至超高 來得小小刺激 低音多人聲結像 來得唔係好貼耳 套野仔係用來聽口水歌個d 未必滿意 聽 左成隻massive attack <<blue lines>> 真好夾 bass先決 又想分析opa1656幾好 Apr 5, 2021 · The original amp has the OPA1656 and the other has the OPA1642. 7 pA/rthz) will multiply with the pickup resistance (varies quite a bit, say typical is 10 kOhm) to become the May 15, 2022 · Buggle2 Riaa board. 3 MHz. May 23, 2018 · Opa1656 and opa1612 without tweaking have better performance than almost any discrete solution. 8. 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). Dec 11, 2019 · The OPA1656 immediately raised my attention, plus there was/is a long thread about it on diyaudio. 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. 7 of OPA1612 datasheet) 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. Great table. It is great to have some measurements behind the OP amp selection. 9 v/µSec for a OPA1656 at isn't really that expensive for opa1656, opa1602, opa1612. 3V inside of each supply. gzrytk jchk okpi mmmz qpwazb axis fovm htj awbu gqzb