Opa1612 vs opa1656 reddit. The OPA827 for example has superior load drive,much lower distortion and miniscule DC offset. 4nV/rtHz both flat. 25 V to ±18 V (4. But that does not say anything about the SQ. Mar 17, 2019 · The OPA1641 would be slightly better. Dec 6, 2018 · This question is triggered by a repair I recently did where the originals, while still available, were stupid expensive. It has the most stable input capacitance vs. The OPA1611 (single) and OPA1612 (dual) bipolar-input operational amplifiers achieve very low 1. I've had the Burson V5i, and the V6vivid and I have no space to put a sparkos labs opamp single or dual channel. 9nV/rtHz vs. . I don't care about listening tests or something else, just want to use the technical better one in my amp. Composite amplifier is one of the best application with opa1656. CMRR is not a big issue. May 9, 2023 · Which of the two mentioned OP Amps (OPA1612 or OPA1656) is the better one, in a scientific point of view. OPA1656 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. 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. 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, 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 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 May 15, 2022 · LME49720 vs OPA1612 vs Muses02. Jul 4, 2021 · The article linked below isn't the be-all and end-all on op amps tests, but very informative. OPA1612 is fuller sounding - especially lower midrange but also more dynamic. It offers exceptional performance in almost any audio application. com with a TI insider involved. OPA1612 is very low noise but have a rise in distortion when driving 600 ohm as voltage 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. NE5532 is a very good amplifier especially for the price ($0. 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 OPA1656 ACTIVE SoundPlus™ ultra-low noise and Bipolar-Input Audio Op Amp OPA1611 — 1. 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. Now, we run through a hand calculation to find the total noise of a simplified audio Jul 5, 2006 · SQ was about the same as other ESS-based dacs in that class. File Size: 611Kbytes. The Opa1612 is the audio version so they made the specs slightly worse. 5 V to 36 V) on 3. 1 nV/√Hz noise density with an ultra-low distortion of 0. The OPA1612 offers rail-to-rail output swing to within 600 mV with a 2 kΩ load, which increases headroom and maximizes dynamic range. The OPA1611 and OPA1612 offer rail-to-rail output swing to within 600 mV with a 2-kΩ load, which increases headroom and maximizes dynamic range. ••• Mar 17, 2019 · The OPA1641 would be slightly better. Nov 30, 2021 · OPA2134: OPA2134 VS OPA1656. 4 Calculating Voltage Noise at the Output. I may try to find a pair of OPA1656. 9 mA of supply current to accommodate the power supply constraints of many types of audio products. Page: 42 Pages. 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). The op amp offers a temperature range of -40°C to +125°C and is available in an 8-pin SOIC package. common mode voltage that I've measured on any op amp. Description: OPA165x Ultra-Low-Noise, Low-Distortion, FET-Input, Burr-Brown™ Audio Operational 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, Apr 5, 2021 · The original amp has the OPA1656 and the other has the OPA1642. 000015% at 1 kHz. Opa1656 has good phase response at high frequency. Standard opamp for that has pretty much become OPA1612. 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 Mar 17, 2019 · OPA1656 rolling I tried in all cases to bypass the rails with a 0. 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. The OPA1656 immediately raised my attention, plus there was/is a long thread about it on diyaudio. Jan 3, 2023 · An update from me. Thread starter forami; Start date 2022-05-15 10:48 am; Facebook Twitter Reddit Pinterest Tumblr WhatsApp Email Share Link. 25V to ±18V or (4. Would it also be possible to publish Watts used (at the outlet) while idle before the 10 minute energy reduction window kicks in? Jul 23, 2022 · DACのオペアンプを交換しました。線が少し細くなりましたが、小音量で全体のバランスが良くなり高域のクリア感が増しました。SOP8パッケージの交換は面倒なので、最後にすべくOPA1612に変えちゃいました。SOP8をDIP変換で交換出来るようにとも考えましたが、安定性を考えて中止です。 Other Parts Discussed in Thread: OPA1612, OPA1642, RC4136 I use these amplifiers for pro audio. For the case of 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. It's a virtually unknown chip as when you search on Digi-Key it doesn't come up as soundplus. Aug 3, 2024 · It's really nice Buckeye has the gear on hand to make these kinds of judgment calls (OPA1612 vs OPA1656) before production. It has a very good dynamic range and a low level of harmonic distortion. 9‑nV/√ Hz voltage noise density and 6‑fA/√ Hz current noise density, allowing for very-low noise performance in a wide variety Mar 17, 2019 · We tried OPA1612, OPA1656, NE5532, and Muses 8920 opamps in Rohm BD34301EKV Evaluation Board (which came with 5532's installed). 5RQ Balanced Power - Tascam CD200 - Oppo 93 - Auvio HD Radio Tuner- MiniDSP OpenDRC-DI DSP, 2x4HD - AcourateDRC - UMIK-1 - ECM8000 - REW - Behringer DEQ2496 - Behringer UMC202HD and Focusrite 4Pre USB - Benchmark DAC2 HGC - Krell KCT pre and FPB 350mcx monoblocks - Sennheiser HD650 - MartinLogan reQuest 15" x 48" electrostatic hybrid with 12" sealed woofer 180Hz cross . File Size: 3MbKbytes. Sep 25, 2019 · The OPA165x operates over a very wide supply range of ±2. 100 Ohm - 100 kOhm, 3). 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). Download. I repeated measurements a few times, using sets of resistors: 1). 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. It occurred to me that a more modern & higher performing part must exist at a lower price - a win-win scenario if ever there was one. 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. However, there really will be very little difference between it and other high performance opamps. ah so much other untested opa's 1678 still on my list ina1620. Mar 17, 2019 · We tried OPA1612, OPA1656, NE5532, and Muses 8920 opamps in Rohm BD34301EKV Evaluation Board (which came with 5532's installed). Oct 15, 2014 · Texas Instruments' OPA1612 (dual) bipolar-input operational amplifier achieves very low 1. 8 bucks for a genuine part. PRODUCTION DATA. Transparency got way better. Tried putting in opa1612 today. 9mA of supply current. 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. 1nV/√Hz Noise, Low Power, Precision Operational Amplifier 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, Dec 28, 2018 · I would like to see the OPA1656, a burr brown sound plus chip. 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. Taking advantage of a wide power supply range and mounted on a DIP8 bracket, it can replace many other models. It appears that the OPA1611/2 have a lower noise voltage, wider bandwidth and higher slew rate than the OPA134 and OPA2134's. Any futher recommendations? my favs 1642/1656, 1612, lme49720na 2xopa627bp, ••• The OPA1656 is the industry’s lowest voltage noise high voltage CMOS on the market. It could sound pretty good, but one could get sound just as good from IC opamp designs. It is sooo tooo solid May 23, 2018 · Opa1656 and opa1612 without tweaking have better performance than almost any discrete solution. 1-nV/√ Hz noise density with an ultralow distortion of 0. I felt a great improvement overall. 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. Mar 17, 2019 · Benefit is lower dc offset and less distortion also high open loop gain also superior stability. i expected them to put some 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 · The Opa1656 has a much wider and better soundstage. Transients are stronger, both rimshots of snare drum and big-band trumpets. (or the 2156) The opamp has good phase margin and seems quite tolerant of sub-optimal layout. It's a killer OpAmp, and better suited to non-inverting buffer duties than the OPA1612/2211 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). Two cases were evalutated – in a This OPA1656 OPA from Texas Instrument offers very good performances for audio use. The FET-input architecture achieves a low 2. The OPA1655 and OPA1656 (OPA165x) are Burr-Brown™ op amps designed specifically for audio and industrial applications, where maintaining signal fidelity is crucial. Dec 11, 2019 · Normally you'd regularily search in the manufacturers new product listings first for any new interesting products. 5 metre cable at 33. I's latest offering, the OPA1656. IMHO the outcome was mostly decided by how the opamps responded to the RF coming out of the dac chip. The knee in the OPA1656 noise curve is higher because the broadband noise of the OPA1656 is lower (2. Page: 23 Pages. 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. 10 kOhm - 10 MOhm Set 1 produces no visual deviation at all. Dynamics felt better, bass felt more defined and the upper midrange seems to have more air. Description: Ultra-low-noise, low-distortion, FET-input, Burr-Brown audio operational amplifier. 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 OPA1655 is the single channel version of the OPA1656. Mar 17, 2019 · If you pick a point on the 1/f portion of the noise spectral density curve you can see that the two parts are essentially identical. For example, at 10Hz both parts are approximately 35nV/rtHz. 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. 5). 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 We would like to show you a description here but the site won’t allow us. 9nV/rtHz as opposed to 3. Sep 6, 2023 · I was using opa1656 with fosi v3 ever since I got the uni. I have settled on 4x OPA1656 in my Burson headphone amp and 4x OPA1655 in my Ayon DAC. Mar 17, 2019 · OPA1656 is less noisy than the OPA827, 2. Eric Mo Intellectual 775 points Part Number: OPA2134 Other Parts Discussed in Thread: OPA1656, OPA134. Currently, I require opamps in the DIP package. It outperforms most other opamps, very low noise & distortion, doesn't color the sound whatsoever. 5V to 36V) on 3. Given these characteristics, there is a solid use case for my bedtime music sound profile (which can take quite few hours of listening each night)! 1656 is in my newly designated relaxation & sleeping tube preamp which I can just swap in anytime. Sep 27, 2019 · The OPA1656 operates over an ultra-wide supply range of ±2. It's best use as an alternative to opa1612 when noise is not a big concern. May 10, 2022 · You don't have to use SA, distortion level obvious on oscilloscope screen. 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. 6 mA but I know I’m in the Op amp thread so I don’t want to take the thread off topic. Home Mar 17, 2019 · Rolling opa1642, opa1612, muses8920, 2xopa627bp, lme49720na, opa2134. Feb 28, 2021 · The new breed of TI J-Fet opamps offer superior performance to that old soldier the OPA2134. 1 kOhm - 1 MOhm 4). But I would still like to see the OPA1656 tested. Soundstage and placement felt more solid. Jan 10, 2016 · He talked to me about OPA1611's versus OPA134's as well as the OPA1612's versus OPA2134's. Some people have more recently started using OPA1656, which are very good, although they are a little less authoritative in the bass. Part #: OPA1656. 10 Ohm - 10 kOhm, 2). 1F X7R on the backside with the shortest possible lead length. I used 10 or 12 in my preamp rolling project - never a problem with System: Equitech 1. But I really like the FET's in that position. 5 MHz LM4562, 55 MHz OPA2134, 8 MHz A 1 metre cable with polyethylene dielectric has its first resonance at 50 MHz, a 1. I also refurbish large format recording consoles. Is the difference in imaging clearly noticeable or just very subtle? I've been using mostly LM4562, except when I need a JFET opamp (high impedance inputs for example). My favorites at the moment opa1642 and this one opa1656. 9‑nV/√ Hz voltage noise density and 6‑fA/√ Hz current noise density, allowing for very-low noise performance in a wide variety Apr 10, 2019 · I have interested in low ESR Electrolytic Capacitors to power the Opa1612. I had no oscillations or instability with the OPA1656. Feb 11, 2021 · According to the TI datasheets OPA1612 has less noise than OPA1656. Total Noise of OPA1656 vs OPA1612. I prefer the opa2211 over the opa1612 (same chip but with less better specs). He gives strong recommendations for some applications and also caveats about ill-informed op amp rolling. Hi Team, My customer wants to 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. 8nV/rtHz). OPA1656 sounded worst, Muses 8920 sounded best. 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. 3 MHz. The Texas Instruments OPA1656 has a specified temperature range from –40°C to +125°C and is offered in an 8-pin SOIC package. alongside with some aliexpress el`cheapos for like 2 buck a piece instead of 7. From what I know the OPA1656 is currently the highest-spec audio grade standard opamp that TI offers. This feature accommodates the power supply constraints of many types of audio products. Dual customzied solution will give unmeasurable distortion (possibly -180db). He does test the TL072 against some more modern ones, but not the OPA1612 due to there being no DIP version I think. rutttgbdangbokwzzidwmmddcttjkdhbhlbhwrejnvxljfnwuagkmrb