Opa1656 vs opa1612 reddit forum. 3 MHz. 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 17, 2019 · Benefit is lower dc offset and less distortion also high open loop gain also superior stability. May 9, 2023 · Which of the two mentioned OP Amps (OPA1612 or OPA1656) is the better one, in a scientific point of view. 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! Other Parts Discussed in Thread: OPA1612, OPA828. ••• I've been using mostly LM4562, except when I need a JFET opamp (high impedance inputs for example). OPA1656 is a bit noisy at low frequencies. The NE5532 is perfectly fine. The different players sounded different. Does anybody 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. Are there any other We would like to show you a description here but the site won’t allow us. Apr 10, 2019 · I have interested in low ESR Electrolytic Capacitors to power the Opa1612. I have settled on 4x OPA1656 in my Burson headphone amp and 4x OPA1655 in my Ayon DAC. 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. I've had the Burson V5i, and the V6vivid and I have no space to put a sparkos labs opamp single or dual channel. Facebook Reddit Pinterest Tumblr WhatsApp Email Share Link. I read on several forum the advantage to use specific AOP for the final stage of DAC or Amplifier. Low output current would mean the transimpedance gain of the I/V circuit will be high, and the input current noise of the op amp will be a significant contributor. Other cheap ones on my radar - OPA2134PA, OPA1612, LM4562NA. 9‑nV/√ Hz voltage noise density and 6‑fA/√ Hz current noise density, allowing for very-low noise performance in a wide variety Dec 6, 2018 · I don't think you can "get into it" here, it quickly degrades to psychoacoustics and audiophoolery compared to science. The op amp offers a temperature range of -40°C to +125°C and is available in an 8-pin SOIC package. Description: Ultra-low-noise, low-distortion, FET-input, Burr-Brown audio operational amplifier. Dear all, aiming to keep THD+N figures constant over the audio frequency range. Thread starter oldphaser; Start date Jan 10, 2016; oldphaser Facebook Twitter Reddit Jul 4, 2009 · Here’s a great article comparing opa2156 CMO vs opa1612. diyAudio Community 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 Mar 17, 2019 · I purchased 10 OPA1656's. Page: 23 Pages. Standard opamp for that has pretty much become OPA1612. Facebook Reddit Pinterest Tumblr Mar 17, 2019 · OPA1656 rolling I tried in all cases to bypass the rails with a 0. I suggest the following reference - 994Enh Discret OpAmp SONIC IMAGERY LABS - SPARKOS LABS SS3606 - AOP 1612 - LM4562 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. Aug 3, 2024 · Forum Donor. He does test the TL072 against some more modern ones, but not the OPA1612 due to there being no DIP version I think. 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, 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. Mar 17, 2019 · We tried OPA1612, OPA1656, NE5532, and Muses 8920 opamps in Rohm BD34301EKV Evaluation Board (which came with 5532's installed). Total Noise of OPA1656 vs OPA1612. I also refurbish large format recording consoles. OPA1656 - Better imaging / separation of instruments. Feb 11, 2021 · I agree about the OPA1612 for gain. Phoenix DIY Central! OPA1611 vs OPA134 or OPA1612 vs OPA2134. Other Parts Discussed in Thread: OPA1612, OPA1642, RC4136 I use these amplifiers for pro audio. File Size: 3MbKbytes. He gives strong recommendations for some applications and also caveats about ill-informed op amp rolling. 6 mA but I know I’m in the Op amp thread so I don’t want to take the thread off topic. 100 Ohm - 100 kOhm, 3). For example the OPA1678 has a much higher gain-bandwidth product than TL072 and different output impedance, which means that the criteria for it being stable (i. Transparency got way better. i expected them to put some 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. I used 10 or 12 in my preamp rolling project - never a problem with Sep 27, 2019 · The OPA1656 operates over an ultra-wide supply range of ±2. 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. Is the OPA1656 the correct opamp to use? I heard it was the best so that’s why I picked it. Mar 17, 2019 · It has the most stable input capacitance vs. Part #: OPA1656. 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. The FET-input architecture achieves a low 2. It offers exceptional performance in almost any audio application. I had no oscillations or instability with the OPA1656. Some people have more recently started using OPA1656, which are very good, although they are a little less authoritative in the bass. I looked at the Slew Rate as my main 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. 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 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. 10 Ohm - 10 kOhm, 2). 7 of OPA1612 datasheet) 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 May 10, 2022 · You don't have to use SA, distortion level obvious on oscilloscope screen. not going into high frequency oscillation) are different and just swapping ICs may cause problems -- you might need to add some compensation for the OPA1678, depending on 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. . The Opa1612 is the audio version so they made the specs slightly worse. 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. The OPA1656 immediately raised my attention, plus there was/is a long thread about it on diyaudio. You can dig on the Internet and find modern op-amp test results, but it quickly crosses over into sonic character and subjective opinion. Mar 17, 2019 · The OPA1641 would be slightly 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. 10 kOhm - 10 MOhm Set 1 produces no visual deviation at all. Joined Feb 24, 2016 Messages FYI I'm about to order an Audiophonics HPA-S400ET with OPA1612 instead of OP275. Below is a comparison between OPA1656 and OPA1642. Since I am not interested in the V6 Vivid Dual that it comes with. In all, I will say the changes are noticeable, but not earth shattering. 5 metre cable at 33. I am planning to replace the NE5532 in my Burson Funk with the OPA1656. 9 v/µSec for a OPA1656 at isn't really that expensive for opa1656, opa1602, opa1612. (or the 2156) The opamp has good phase margin and seems quite tolerant of sub-optimal layout. 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. 4nV/rtHz both flat. I would have no problem staying with them, but I like tinkering. 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 Dec 28, 2018 · I would like to see the OPA1656, a burr brown sound plus 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. 25 V to ±18 V (4. 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. 5 V to 36 V) on 3. Which one has better electrical TI E2E support forums The OPA1655 and OPA1656 (OPA165x) are Burr-Brown™ op amps designed specifically for audio and industrial applications, where maintaining signal fidelity is crucial. CMRR is not a big issue. 1 kOhm - 1 MOhm 4). Two identical gain 11 amplifiers were tested. It could be very interesting to test their performance: - SNR - Bandwish - slew rate-. e. My understand if noise isn’t a problem the opa1656 is great alternative to the opa1612. JFET inputs let you work with a larger range of input resistors. It outperforms most other opamps, very low noise & distortion, doesn't color the sound whatsoever. Regarding the tone stack, if there is enough gain in the front-end, the input-referred noise may not be impacted by the resistances. Thanks in advance. Best regards! Feb 11, 2021 · Yes. Jul 4, 2009 · The Opa1656 has a much wider and better soundstage. May 23, 2018 · Opa1656 and opa1612 without tweaking have better performance than almost any discrete solution. 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. 8 bucks for a genuine part. I prefer the opa2211 over the opa1612 (same chip but with less better specs). consists of 2 x 10 op-amps in parallel and the two 10s are balance connected. 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, Jan 3, 2023 · An update from me. Soundstage and placement felt more solid. Description: OPA165x Ultra-Low-Noise, Low-Distortion, FET-Input, Burr-Brown™ Audio Operational Part #: OPA1656. For the case of Jan 10, 2016 · Forums. common mode voltage that I've measured on any op amp. The OPA1655 is the single channel version of the 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. 4 nV/rthz. Mar 17, 2019 · The Vendor's Bazaar forum is for commercial offers and transactions. I ended up staying with this one. Dec 11, 2019 · Normally you'd regularily search in the manufacturers new product listings first for any new interesting products. 8. I’m going to solder the IC to a soic to dip adapter then plug it into the the amp. 1F X7R on the backside with the shortest possible lead length. My OP1656 OpAmp Review. Several reference are used on forum. The input is essentially shorted with 10mohm resistor in order to have a -140db control signal. 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 Dec 28, 2017 · There are some things to watch out for when swapping op amps. The Vendor's Bazaar forum is for commercial offers and transactions. The NE5532 is used everywhere as its sound profile is designed to catch people's attention. Sep 6, 2023 · I was using opa1656 with fosi v3 ever since I got the uni. 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. I prefered the sound of my DAC with the OPA1656's hands down even over the discrete op-amps. 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. alongside with some aliexpress el`cheapos for like 2 buck a piece instead of 7. OPA1656 sounded worst, Muses 8920 sounded best. Every amp. 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 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. OPA1612 is very Jul 4, 2021 · The article linked below isn't the be-all and end-all on op amps tests, but very informative. 9‑nV/√ Hz voltage noise density and 6‑fA/√ Hz current noise density, allowing for very-low noise performance in a wide variety May 15, 2022 · Site Site Announcements Forum Problems Facebook Twitter Reddit Pinterest Tumblr Amplifiers. I's latest offering, the OPA1656. It has the most stable input capacitance vs. 7 pA/rthz) will multiply with the pickup resistance (varies quite a bit, say typical is 10 kOhm) to become the Jul 3, 2019 · Forum Donor. I would tend to use the OPA1642 for buffering, filtering and EQ. It's a virtually unknown chip as when you search on Digi-Key it doesn't come up as soundplus. 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. I repeated measurements a few times, using sets of resistors: 1). 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. 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. 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 mA of supply current to accommodate the power supply constraints of many types of audio products. To help others to understand what other audio components are being used, a SML SU-6 and SH-6 are used. Dec 10, 2021 · This is my first time doing anything DIY with audio. BTW, last year I crippled my €4. Page: 42 Pages. Tried putting in opa1612 today. However, there really will be very little difference between it and other high performance opamps. It's best use as an alternative to opa1612 when noise is not a big concern. IMHO the outcome was mostly decided by how the opamps responded to the RF coming out of the dac chip. com with a TI insider involved. Chip Amps. OPA1656 The OPA1655 and OPA1656 (OPA165x) are Burr-Brown™ op amps designed specifically for audio and industrial applications, where maintaining signal fidelity is crucial. But I would still like to see the OPA1656 tested. Composite amplifier is one of the best application with opa1656. Dual customzied solution will give unmeasurable distortion (possibly -180db). The diyaudio forum might be better suited for posing the question. Mar 17, 2019 · OPA1656 is less noisy than the OPA827, 2. Download. Currently, I require opamps in the DIP package. I felt a great improvement overall. 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). The OPA1656 is the industry’s lowest voltage noise high voltage CMOS on the market. 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. Joined Dec 21, 2020 Messages 1,924 (OPA1612 vs OPA1656) before production. Dynamics felt better, bass felt more defined and the upper midrange seems to have more air. 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. 4 Calculating Voltage Noise at the Output. I don't care about listening tests or something else, just want to use the technical better one in my amp. Opa1656 has good phase response at high frequency. It could sound pretty good, but one could get sound just as good from IC opamp designs. PRODUCTION DATA. I think it's a matter of circuit design and implementation. File Size: 611Kbytes. 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. LME49720 vs OPA1612 vs Muses02. Nov 30, 2021 · Part Number: OPA2134 Other Parts Discussed in Thread: OPA1656 , OPA134 Hi Team, My customer wants to replace OPA1656 with OPA2134. 9nV/rtHz vs. 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 · For a DAC chip with a low output current, I would suggest op amps with FET type inputs, either JFETs or CMOS. rrimaq mwsnw rgy vukuc jgxcarw pvlq kaqupbag ztjhark nqal hrknq