Opa1612 diyaudio specs. Cheers Oct 7, 2020 · Hi :) I've a bit of experience with Altium Designer, C/PP, general MCU stuff, things like I2C and so on. 5 MHz LM4562, 55 MHz OPA2134, 8 MHz A 1 metre cable with polyethylene dielectric has its first resonance at 50 MHz, a 1. 15ppm, intermodulation way below that, 1. I've had an OPA1612 lose its mind in a filter circuit where an LME49720 worked just fine. PCM1794, OPA1612 . May 3, 2022 · Its not immediately clear what would upgrade NJM4580 which is already quite low noise. There are JRC4580 opamps on the TRS inputs and 4 JRC4580 opamps on the 4 main speaker outputs. In parallel, talking with Jan Didden, I had embarked a similar trek that now show up on page 42 of the March 2021 AudioXpress. EX version has 2 channells. but if you make a replacement part that originally contains opa1612 and people pay for it, it would be not good for your rep if you use fake parts to save a buck. Is there another OPAMP that can be substituted and have the same performance. A fully differential amplifier with excellent audio specs. Mar 17, 2019 · But for MC phono pre-amps a low noise bipolar input op amp like the OPA1612 would give the best noise performance. I opened one SO-8 package and put it under the microscope in our workshop. The OPA161x family of bipolar-input operational amplifiers achieve very low 1. Heard it all here with different LS and poweramps. 5 metre cable at 33. Money being no option for this project, I am looking to replace all opamps with the BEST opamps as far as specs go highest frequecsy response 20hz-20khz and so forth. Jul 29, 2022 · OPA1612 USB converter is my version of Amanero. 5nv/6. Without scoping the outputs or measuring the DAC there's no telling if Jul 5, 2006 · What are the general impressions of OPA2365. Although, I have to think that all of our hard work achieving ultra low noise in phono preamps goes out the window as soon as the needle touches the vinyl, and circuit noise is swamped by mechanical noise in the system. At a gain of 60dB, the THAT is only down to -82dB. I ordered OPA2365 to replace Jul 30, 2021 · If I could also request test of: OPA1642 ~ 2 Euro OPA1656 ~ 2. Feb 11, 2021 · My preamp sounds best with OPA1612 for gain and OPA2192 as buffer. What's not to like with that, and all the other SoundPlus family? Craig ••• 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. Mar 17, 2019 · Voltage noise is higher on 1656 at low frequency til 1khz. Vendor's Bazaar. Also intend using Opa1612 for buffer ,inverting unity gain voltage follower. The OPA1611 and OPA1612 op amps 3. Aug 24, 2012 · i tryed lme49722 opa2134 and opa1612 ,--. EQ version has 4 chanell so has 4 capacitors. Aug 22, 2009 · With all this talk of DC specs, it's interesting to note that the OPA1611 equals or exceeds the LM4562 in everything except bias current. 5 Euro OP275 ~ 3 Euro OPA1612 ~ 6 Euro According to specs I would think the OPA1642 would be one of the best compromises cost vs performance wise. May 8, 2011 · Speed is an issue, though. 6 mA per Channel are unity-gain stable and provide excellent dynamic • Rail-to-Rail Output behavior over a wide range of load conditions. 3v for oscillator and other 3. He does test the TL072 against some more modern ones, but not the OPA1612 due to there being no DIP version I think. OPA1656: High-Performance CMOS Audio Op Amp . Mar 17, 2019 · TI's SoundPlus opamp family are astonishingly superb designs. Also the OPA1612 does have the highest quiescent over the other opamps we're talking about it will be the hottest. Regular version has some compromises in oscillators, power supply. Mar 17, 2019 · A quick snapshot of the OPA1656 performance specs: 2. I've done more research and actually have decided against the 2211 and will be using the opa1612 instead for the following reasons: - opa1612 supports 45ma full output current (which could be useful since it's an output buffer stage driving unknown amplifier impedance . 50 cents or 5 bucks, Cheap. 1-nV/√Hz noise density with an ultralow distortion of 0. Nov 2, 2018 · Many of us experimenting with many different power amplifiers run into the problem of needing a pre-amp for test that can handle all power amplifiers concerning input level and impedance. I think I'll stand my my statements: OPA1612 for buffering and places where base current can be tolerated, and for gain if low value input resistors can be used. Use of this facility is at your own risk. ••• Apr 7, 2019 · There are three old chips that are better than ne5532 as i/v stage, but there's no discussion whatsoever on DIYaudio about them and i won't ruin the secrecy tradition mainly because one of them was reactivated after 15 years for a short period of time at Mouser and is programmed for EOL, the stock being limited. He gives strong recommendations for some applications and also caveats about ill-informed op amp rolling. These discrete regulators already exceed the PSRR and self noise of the Feb 28, 2022 · For some reason the OPA1612 seems to have a very similar noise voltage with a 1 Mohm source resistance, but in this case the current noise is specified as 1. Headphone output stage is basically a Cmoy operating at single supply 3. Jan 14, 2019 · I bought 10 OPA1612 from a chinese ebay seller. Strange but found too many times to ignore it. Dec 10, 2015 · diyAudio provides this forum for the convenience of our members, but makes no warranty nor assumes any responsibility. Jan 5, 2020 · I did replace OPA1612 for OPA1656, and also switched ADC input range for the 1. No hump at all and IMD of two devices together looks quite low, at least 3 times better vs DIY 9038PRO(which is 12x times more expensive vs 9038Q2M) ;) I have to Apr 18, 2020 · TI continues to surprise us with top notch products. It might require more capacitance in the LPF of the I/V stage to keep it happy Vs the others. I used OPA1612 and analog schematic comes form datasheet. I know well the opa1612 in the output stage of DAC and while it is good I prefer the sound of AD4898-2 for that application. I has very little phase margin at unity gain. Mar 17, 2019 · We tried OPA1612, OPA1656, NE5532, and Muses 8920 opamps in Rohm BD34301EKV Evaluation Board (which came with 5532's installed). Home. I was wondering if the OPA2604's could be replace with a dual opamp like the OPA1612 with similar or hopefully better results than the OPA627's Nov 13, 2016 · Aren't you comparing the the that1512 at 60dB gain vs the opa1612 at 0dB gain ? At x1, the that1512 is -100dB thd+n (0,001%). I payed 6. I’m guessing a gain of 10 would necessitate an Rf in the 150R-180R range. OPA1656 sounded worst, Muses 8920 sounded best. 3v components, ltc6655 and opa1612 for AVCC and VREF, tps65131 +-15v and low voltage through LM317/337. Feb 11, 2021 · Looking at the specs, I would use if for gain, but not for buffering. Lots of high performance models hate sockets. -60dbfs. Now I grant you, price is not an indictor if it is the best choice. It's best use as an alternative to opa1612 when noise is not a big concern. 9nV/rtHz broadband voltage noise; 6 fa/rtHz broadband current noise-131 dB THD+N at 1kHz, 600 ohm load, 3. OPA1656: High-Performance CMOS Audio Dec 12, 2019 · It would most likely be +/-15V (30V total). 000015% at 1 kHz stable and provide excellent dynamic behavior over a • High Slew Rate: 27 V/μs wide range of load conditions. 7 pA/sqrt(Hz), which fits better with the curve. We do not vet any members. This combination will sound slightly more clinical than the OPA2228/OPA2822 combination. I hesitate to recommend those without simulating the circuit. It sounds fine, just slightly better than my HTC Desire 820 Dual SIM. I went through several iterations and settled on JFET buffers to raise the input impedance. Customers can post any issues in those threads as long as it is done in a civil manner. IMHO the outcome was mostly decided by how the opamps responded to the RF coming out of the dac chip. It turned out that these OPA1612 are cheap TL082 FET Opamps as you can see on the photos. Mar 17, 2019 · All diyAudio rules about conduct apply and will be enforced. I have a China made DAC in which they used AD8397 for the headphone OUT. There are gain-of-8 specs, with an optimal Rf being 200R. I can see several places where this would fit very well, like fully balanced post-DAC Nov 17, 2017 · Hi, after a while i decided to make a dual mono DAC board es9038q2m. 5mA max Jun 5, 2023 · Although specifications of OPA1612 (bipolar) indicate they are superior to that of OPA1642 (JFET inputs) in practice OPA1642 performs slightly better. Feb 17, 2023 · The OPA1622 is a slow device compared to the OPA1612/OPA1656. All external compensation. The higher current drive of the OPA2822 would be beneficial. Jun 26, 2023 · The THS3112 is of the same era as the TPA6120A2 (or its progenitor the THS6012 rather), and comes in a hair below 5mA on a dual 15V supply. 25 V to ±18 V The dual version features completely independent TI’s OPA1612 is a SoundPlus™ Audio Operational Amplifier with 1. They are ~6. Feb 11, 2021 · According to the TI datasheets OPA1612 has less noise than OPA1656. Jun 23, 2019 · 5) I/U OPA1612 or similar with 600ohm feedback resistor and some preliminary passive LPF before I/U stage(ES9038Q2M has quite big out-band noise). 1nV/root Hz at 1kHz with a 10Hz 1/f corner and will cheerfully drive 600 ohms. IMO, the ADA4627-1 has a fuller, more "musical", sound than the somewhat thin/sterile LM4562, whilst still retaining nicely detailed highs, and remains my favorite sounding op amp to date. 7. Some will point out the OPA1612 (which is even better) or the OPA1656. Jul 24, 2017 · OPA1612 has like an 80 MHz GBW and 40 MHz fT while being run at a gain of 3, while NJM4556AD is an 8 MHz part. I'm hoping this community could be of help. If you're prototyping - be sure to apply power at the same time, if your ground connection fails - AD8397 will burn, JRC4556 is virtually indestructible compared to AD8397. Last edited: 2020-10-05 9:04 pm More options Dec 11, 2018 · Featured Vendors The diyAudio Store Parts Connexion miniDSP DIY HiFi Supply. There is a plot of closed loop gain to May 15, 2022 · Featured Vendors The diyAudio Store Parts Connexion miniDSP DIY HiFi Supply. I will only tell the fourth Jul 26, 2020 · I agree with you, OPA1612 is really good regarding details resolution, OPA1656 has the best of both world : ultra high definition regarding micro details and very neutral but still warm. It enabled the use of better components (actual measured performance) that otherwise Jul 4, 2021 · The article linked below isn't the be-all and end-all on op amps tests, but very informative. With a low price and nevertheless minimum THD. Oct 29, 2009 · The LM833 has very similar datasheet specs to an NE5532 (the 833 is a little quieter, the 5532 a little faster). The bottom line is that different markets need different specs and companies optimize products to match the market. Last edited: 2023-06-06 6:15 am May 19, 2017 · An OPA1612 has slightly better specs than an LM4562---less noise and distortion, faster, and more output voltage swing. CMRR is not a big issue. Now even 40 MHz / 3 clearly is not < 3 * 8 MHz, so that won't work out without some local feedback across the 1612 to reduce GBW, usually in the form of a small capacitor. . Jul 5, 2006 · Personally I prefer LM4562, OPA2228 and OPA1612 over OPA1642 because of the input noise that makes it sound less pristine. Jan 24, 2020 · Have you also considered other opamps for output stage. NOTE: I realize I could stick just about any dual 8pin OPAMP in place but the goal here is high quality audio performace. Nov 22, 2021 · If phase is correct about your original op-amps being rebadged LT1057s, the change to OPA2132 may bring little joy: The 1057s are 4 - 6 dB quieter and more accurate, if you believe the PDF specs. Here's what he said: "The board already has exotic Bruno Putzeys designed discrete regulators that power the onboard TI OPA1612 opamps, as well as the amplifier modulator boards. 1 Overview. 8Vrms and remeasured the range -15dbfs. • Wide Supply Range: ±2. Diy DAC/amp with PCM2707 Jan 6, 2010 · I have an Onix XCD-99 which is basically a Music Hall CD-25. the best sounding is OPA1612 ,not for driving headphones -low output current drive ,3ma current consumption ---then opa2134 the best all around as preamplifier it can be used at high gain 6-10 times,very good sounding and Musical,good for biassing in class A. 7 EUR at Mouser. 3 MHz. 1nv). If you pick out something different to try, make sure the mfg doesn't recommend 'no-socket' mounting. TL074 is easily surpassed by OPA1644, that's a no-brainer. Thanks for the information on "running hotter". ••• Oct 8, 2001 · ( 49 cents, plus $11 shipping for one of course) We are talking about a chip that is better than a $1000 discrete buffer stage of years passed. I'd like to have a crack at making a decent DAC to level up my elec skills. Opa1656 has good phase response at high frequency. 5 V. 55), but in inverting mode only. The LME49860 is another option. May 8, 2022 · I am not certain that would be an good idea: The MJM4558 should have a gain-bandwidth of 3MHz whereas the OPA1612 has 40-80 MHz (depending on amplification). For the case of Feb 17, 2023 · I'd go with the LM4562 (= LME49720) instead. Find parameters, ordering and quality information. The 4627 is faster the the 627 (82v/uSec vs. I'm using the OPA1612 dual opamp in a commercial design. But that does not say anything about the SQ. I initially saw both the low input impedance and the signal inversion as potential drawbacks. At least it is my preference when associated with an AK-449x DAC. 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. (If I am not wrong OPA1656 is a really modern OP Amps from March 2019 vs 2017 for the OPA1692). Apr 16, 2021 · I wonder if the OPA1612 are like this: Fake OPA1612 from China I have done similar small test batches and examination of some other components such as solid polymer capacitors, polypropylene capacitors and certain difficult to obtain very low noise transistors. I'm at the first hurdle, finding accurate footprints/models to Aug 28, 2009 · In comparing the spec sheets of OPA627B and ADA4627B-1, the current noise specs are identical (1. • Low Quiescent Current: per channel. What do you think will be the opa1612 distortion now that the available amount of feedback at 1khz has lost 60db ? ••• May 26, 2016 · AD8397 is great, just be sure to put 2-3 Ohm output resitor, wirewound 5W should keep the op-amp safe from shorting output to the ground. 5mA max Mar 17, 2019 · A quick snapshot of the OPA1656 performance specs: 2. Aperiodic step response with 100ns rise/fall times. After the OPA1656 I 'discovered' the OPA1637. Jun 5, 2023 · Although specifications of OPA1612 (bipolar) indicate they are superior to that of OPA1642 (JFET inputs) in practice OPA1642 performs slightly better. Is this layout ok, even though it's not complete ••• Jan 20, 2013 · i intend to use only opa1612 because i like how it sound,has also very good specs-i always set the gain opamp -1st, as multiple feedback LPF (with 56 and 100) i WOULD get excellent q factor and very low noise. My first tests were with an OPA1612 (equivalent to OPA2211) in the instrumentation stage, but I didn't manage to get the circuit ringing free under all circumstances due to sloppy wiring, decoupling and grounding. 6fA @100 Hz), and the voltage noise favors the 627 only slightly (4. All diyAudio rules about conduct apply and will be enforced. You can also try OPA1612 as buffer with OPA2822 for the headphone driver. So i expected to get fakes but i wanted to know it for shure. I would be afraid of that chip in noninverting unity gain buffers. Apr 28, 2023 · OPA1612AID's for the AMB Audio Behinger DCX2496 are on deep backorder from Mouser and Digikey. Jul 5, 2006 · Featured Vendors The diyAudio Store Parts Connexion miniDSP DIY HiFi Supply. While improving on the flaws, some of the IC's SMD legs gave up and broke off. --lme49722 lme4562 lm4562 opamp is very good sound ,higher ratings than opa2134 -but not as Jun 5, 2023 · true, whole opamp rolling community is all hoax and no one can actually tell them apart by hearing. Jan 26, 2012 · You can take RT6863S, a very cheap Chinese opamp(1/3 of opa1612 cost) with very high symmetry of the input stage, and in that case, you'll see <150-160db H2. Source impedance, inverted or not, rail voltage, ad nauseum specs. I use better parts and designed converter on 4 layer board. Harmonic distortion <0. 5Vrms signal, 80-kHz measurement bandwidth; 53 MHz gain bandwidth product, 24V/us slew rate >100mA output current; 4. Gain stage combined with LPF 50-80kHz, OPA1612 probably composite but not necessary yet. 000015% at 1 kHz. Also, you can try to select from 5-7pcs of OPA1612 the best one, and you'll see <-150db. 000. The rail-to-rail output swing, within 600 mV with a 2-kΩ load, increases headroom and maximizes dynamic range. Swapping might (not "will") cause oscillation as the PCB and decoupling designed for the slow '4558 may not be up to the task with the much faster '1612. ADA4625-1/2 are supposed to be even better than the ADA4627-1, though I've yet to try them. Jul 5, 2006 · Hi All, Please advise what would be the best bet for a modern replacement of the NJM353 in my 12-15 years old vintage 4X60W Class A Zero Feedback car amplifier? Tried dual OPA627AU on adaptor but the sound is of reduced volume, of loss details and PCB is warmer than before and the noob in me did not realized the input current of 7mA X 2 or 14mA for the each of 4 dual adaptor as compared to Mar 27, 2024 · The AD797 is specialized to low impedance work in the 10R to 1k impedance range, its not a general all-round performer (mainly let down by its price and current noise) It was designed for sonar hydrophones I believe, for general audio work the OPA1612 is probably a more capable low-voltage-noise part as its rail-to-rail and far cheaper as its Dec 25, 2019 · Mike just answered an email I sent him regarding the quality of the stock Purifi input board. OPA1612, OPA2211, LME49720HA, OPA2111, AD746 (class A), AD8620, AD8066, Jan 6, 2020 · Not long after AX published Michael Steffes composite OPA1612/TPA6120A2 design in March, 2021, I decided to give his circuit a try. The OPA1612-Q1 op amp is unity-gain 0. Mar 2, 2020 · And unity gain stable without any caps ? Show us then. That's 36dB worse than the opa1612, not 50. 0mA typical supply current, 4. Members Market Swap Meet Group Buys. Tested a lot of OP, including LME49720, OPA1612, OPA1642, MUSES8920 and MUSES8820. With the OPA1612 there is also a bias current, which can be either polarity, implying that also in this case base current compensation is used. Dec 10, 2015 · A fair question! And although I was the product definer and systems lead for this part, I don't get 100% control over the marketing folks But, I can honestly say that when we started working on this part about a year ago, I was very adamant that I didn't want to create a part with excellent specs but terrible sound quality in the real world. I never could understand why Jim Williams, in his modification of the Dolby 363, used BOTH of them, each in a different part of the circuitry. 6) Output XLR balanced, ideally if with a big-good permalloy trafo. Ordered the eval module to get a head start*. I'm not sure on the output current. Jan 6, 2020 · Good morning all, I was not actually aware all this composite amp work using the TPA6120A2 was going on. 80 EUR for all ten. I succumbed to the heat a bit, but really in the framework of decency. OPA1612 on paper has lower voltage noise but whether its lower noise in practice depends on the circuit impedances. I use Rcore transformer and LT1674 to main 5v, then LT1674 on mainboard to main 3. The AD opamp is more expensive though than the OPA1612. 1nV/√Hz Noise, Low THD and Precision. I noticed a low-cost headphone amplifier board based on Feb 4, 2014 · In places less hospitable to LME49720, OPA1612 has proven to be a very useful opamp for dac I/V and or differential summing. It has OPA2604 buffer amps that many have replaced with dual OPA627BP's with good results. And this preamp sounds MUCH better than Audio Research, Burmester and Accuphase preamps costing above €10. Feb 25, 2011 · These I want to replace first. May 19, 2017 · OPA2211A/OPA1612 also sound a bit better than LM4562, IMO. Benefit is lower dc offset and less distortion also high open loop gain also superior stability. mcvun tvg kxlso yxwjyn ddpq qdwei dcbyeqr uqajl gyml zfdjz