Opa1656 vs opa1612 forum reddit. i expected them to put some Sep 27, 2019 · The OPA1656 operates over an ultra-wide supply range of ±2. 8 bucks for a genuine part. Mar 17, 2019 · Benefit is lower dc offset and less distortion also high open loop gain also superior stability. He does test the TL072 against some more modern ones, but not the OPA1612 due to there being no DIP version I think. I prefer the opa2211 over the opa1612 (same chip but with less better specs). Page: 23 Pages. 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. I suggest the following reference - 994Enh Discret OpAmp SONIC IMAGERY LABS - SPARKOS LABS SS3606 - AOP 1612 - LM4562 Dec 10, 2021 · This is my first time doing anything DIY with audio. But I would still like to see the OPA1656 tested. 4 Calculating Voltage Noise at the Output. Phoenix DIY Central! OPA1611 vs OPA134 or OPA1612 vs OPA2134. 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. 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. File Size: 3MbKbytes. Standard opamp for that has pretty much become OPA1612. 4 nV/rthz. 9 mA of supply current to accommodate the power supply constraints of many types of audio products. . 8. OPA1656 Jul 5, 2006 · SQ was about the same as other ESS-based dacs in that class. Composite amplifier is one of the best application with opa1656. It offers exceptional performance in almost any audio application. com with a TI insider involved. It has the most stable input capacitance vs. 1F X7R on the backside with the shortest possible lead length. It outperforms most other opamps, very low noise & distortion, doesn't color the sound whatsoever. Dear all, aiming to keep THD+N figures constant over the audio frequency range. CMRR is not a big issue. 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. 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. 6 mA but I know I’m in the Op amp thread so I don’t want to take the thread off topic. Soundstage and placement felt more solid. 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. Now, we run through a hand calculation to find the total noise of a simplified audio 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 · The Vendor's Bazaar forum is for commercial offers and transactions. 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. Would it also be possible to publish Watts used (at the outlet) while idle before the 10 minute energy reduction window kicks in? 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). 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 had (indeed) in mind AD844 & OPA861 (not sure the first don't use feedback!) after reading many threads here and there but was asking myself if there were something better with all the launchs from several years nowMy very basic undestanding is they were good to be loaded with relativly high impedance outputt of current outputt dac chips while giving at Mar 17, 2019 · The OPA1641 would be slightly better. Does anybody Sep 6, 2023 · I was using opa1656 with fosi v3 ever since I got the uni. common mode voltage that I've measured on any op amp. Is the OPA1656 the correct opamp to use? I heard it was the best so that’s why I picked it. I may try to find a pair of OPA1656. 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. But that does not say anything about the SQ. PRODUCTION DATA. Tried putting in opa1612 today. It could be very interesting to test their performance: - SNR - Bandwish - slew rate-. Are there any other Other Parts Discussed in Thread: OPA1612, OPA828. Description: Ultra-low-noise, low-distortion, FET-input, Burr-Brown audio operational amplifier. 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. 7 pA/rthz) will multiply with the pickup resistance (varies quite a bit, say typical is 10 kOhm) to become the 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 Jul 4, 2009 · The Opa1656 has a much wider and better soundstage. Several reference are used on forum. The FET-input architecture achieves a low 2. Other Parts Discussed in Thread: OPA1612, OPA1642, RC4136 I use these amplifiers for pro audio. Apr 10, 2019 · I have interested in low ESR Electrolytic Capacitors to power the Opa1612. Transparency got way better. 5 MHz LM4562, 55 MHz OPA2134, 8 MHz A 1 metre cable with polyethylene dielectric has its first resonance at 50 MHz, a 1. 9nV/rtHz vs. Mar 17, 2019 · The OPA1641 would be slightly better. It's a virtually unknown chip as when you search on Digi-Key it doesn't come up as soundplus. Jul 4, 2009 · Here’s a great article comparing opa2156 CMO vs opa1612. Part #: OPA1656. Since I am not interested in the V6 Vivid Dual that it comes with. 9 v/µSec for a OPA1656 at isn't really that expensive for opa1656, opa1602, opa1612. BTW, last year I crippled my €4. Thread starter oldphaser; Start date Jan 10 Facebook Twitter Reddit Pinterest Tumblr 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. The Vendor's Bazaar forum is for commercial offers and transactions. Is the difference in imaging clearly noticeable or just very subtle? Mar 17, 2019 · Thank you so much for the hints. 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 Feb 10, 2020 · And I've tried many Opamps as well: the stock 5532, some directly purchased from TI 5532P and 5532AP, LME47920, LM4562 and finally some OPA1656 and OPA1612 on adapters. Dual customzied solution will give unmeasurable distortion (possibly -180db). 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? Facebook Reddit 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. I felt a great improvement overall. 10 kOhm - 10 MOhm Set 1 produces no visual deviation at all. 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! Jan 10, 2016 · Forums. Mar 17, 2019 · Azul headphone amp (BAF 2019) uses an OPA1611 + LH0033 composite. OPA1612 is very Jul 3, 2019 · Forum Donor. Aol Mar 17, 2019 · I purchased 10 OPA1656's. 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 Dec 28, 2018 · I would like to see the OPA1656, a burr brown sound plus chip. My understand if noise isn’t a problem the opa1656 is great alternative to the opa1612. 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 The OPA1656 is the industry’s lowest voltage noise high voltage CMOS on the market. (or the 2156) The opamp has good phase margin and seems quite tolerant of sub-optimal layout. I read on several forum the advantage to use specific AOP for the final stage of DAC or Amplifier. 9‑nV/√ Hz voltage noise density and 6‑fA/√ Hz current noise density, allowing for very-low noise performance in a wide variety Nov 30, 2021 · Stability should be considered especially with the wider bandwidth of the OPA1656. I prefered the sound of my DAC with the OPA1656's hands down even over the discrete op-amps. 4nV/rtHz both flat. For the case of Dec 6, 2018 · I don't think you can "get into it" here, it quickly degrades to psychoacoustics and audiophoolery compared to science. diyAudio Community The OPA1655 and OPA1656 (OPA165x) are Burr-Brown™ op amps designed specifically for audio and industrial applications, where maintaining signal fidelity is crucial. 10 Ohm - 10 kOhm, 2). It's best use as an alternative to opa1612 when noise is not a big concern. 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 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. I had no oscillations or instability with the OPA1656. Currently, I require opamps in the DIP package. Page: 42 Pages. Description: OPA165x Ultra-Low-Noise, Low-Distortion, FET-Input, Burr-Brown™ Audio Operational 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. Opa1656 has good phase response at high frequency. Regarding the tone stack, if there is enough gain in the front-end, the input-referred noise may not be impacted by the resistances. It could sound pretty good, but one could get sound just as good from IC opamp designs. 3V inside of each supply. 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. 3 MHz. 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. 5 V to 36 V) on 3. Mar 17, 2019 · OPA1656 is less noisy than the OPA827, 2. 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. IMHO the outcome was mostly decided by how the opamps responded to the RF coming out of the dac chip. 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. The different players sounded different. I think it's a matter of circuit design and implementation. LME49720 vs OPA1612 vs Muses02. However, there really will be very little difference between it and other high performance opamps. 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. Download. 1 kOhm - 1 MOhm 4). Mar 17, 2019 · We tried OPA1612, OPA1656, NE5532, and Muses 8920 opamps in Rohm BD34301EKV Evaluation Board (which came with 5532's installed). Facebook Reddit Pinterest Tumblr 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. The Opa1612 is the audio version so they made the specs slightly worse. May 10, 2022 · You don't have to use SA, distortion level obvious on oscilloscope screen. File Size: 611Kbytes. 7 of OPA1612 datasheet) Mar 17, 2019 · OPA1656 rolling I tried in all cases to bypass the rails with a 0. 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. To help others to understand what other audio components are being used, a SML SU-6 and SH-6 are used. We would like to show you a description here but the site won’t allow us. 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. It is sooo tooo solid May 23, 2018 · Opa1656 and opa1612 without tweaking have better performance than almost any discrete solution. I's latest offering, the OPA1656. The output swing for Aol should be considered as it is different between the two devices. 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. 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 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. I used 10 or 12 in my preamp rolling project - never a problem with Mar 17, 2019 · We tried OPA1612, OPA1656, NE5532, and Muses 8920 opamps in Rohm BD34301EKV Evaluation Board (which came with 5532's installed). The OPA1655 and OPA1656 (OPA165x) are Burr-Brown™ op amps designed specifically for audio and industrial applications, where maintaining signal fidelity is crucial. Chip Amps. 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. 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. 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. alongside with some aliexpress el`cheapos for like 2 buck a piece instead of 7. Feb 11, 2021 · According to the TI datasheets OPA1612 has less noise than OPA1656. The op amp offers a temperature range of -40°C to +125°C and is available in an 8-pin SOIC package. 100 Ohm - 100 kOhm, 3). 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). 5 metre cable at 33. I am planning to replace the NE5532 in my Burson Funk with the OPA1656. 000 (DIY!) tube preamp with tube 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. May 15, 2022 · Site Site Announcements Forum Problems Facebook Twitter Reddit Pinterest Tumblr Amplifiers. OPA1656 sounded worst, Muses 8920 sounded best. I also refurbish large format recording consoles. 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. 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. 25 V to ±18 V (4. 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. May 9, 2023 · Which of the two mentioned OP Amps (OPA1612 or OPA1656) is the better one, in a scientific point of view. 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. He gives strong recommendations for some applications and also caveats about ill-informed op amp rolling. I repeated measurements a few times, using sets of resistors: 1). Some people have more recently started using OPA1656, which are very good, although they are a little less authoritative in the bass. Dec 11, 2019 · Normally you'd regularily search in the manufacturers new product listings first for any new interesting products. The diyaudio forum might be better suited for posing the question. Dynamics felt better, bass felt more defined and the upper midrange seems to have more air. Jul 4, 2021 · The article linked below isn't the be-all and end-all on op amps tests, but very informative. I’m going to solder the IC to a soic to dip adapter then plug it into the the amp. For example, Aol for the OPA1656 with a 600 ohm load will have a linear output swing that is 1. I don't care about listening tests or something else, just want to use the technical better one in my amp. Joined Feb 24, 2016 Messages FYI I'm about to order an Audiophonics HPA-S400ET with OPA1612 instead of OP275. You can dig on the Internet and find modern op-amp test results, but it quickly crosses over into sonic character and subjective opinion. I've been using mostly LM4562, except when I need a JFET opamp (high impedance inputs for example). afcqnfvkbsymohxyqxbammjvotdmefgsfhcmrdexxelxkfwazsxvtnjnunzk
