Opa1612 diyaudio specs
Opa1612 diyaudio specs. Without scoping the outputs or measuring the DAC there's no telling if Feb 11, 2021 · Dont make me laugh, if you can't hear the difference 5532 vs OPA1612 than you should not be very concerned about SQ (in your case). The 4627 is faster the the 627 (82v/uSec vs. Apr 26, 2018 · Comparing it to the OPA1612, I may be hearing the difference between the OPA1612's bipolar inputs and either JFET or FET inputs in the YELLOW device. Feb 17, 2023 · I'd go with the LM4562 (= LME49720) instead. 3v components, ltc6655 and opa1612 for AVCC and VREF, tps65131 +-15v and low voltage through LM317/337. Nov 17, 2017 · Probably better to use OPA1612 anyway, less sensitive to RF and may sound a little better too. Dec 10, 2015 · diyAudio provides this forum for the convenience of our members, but makes no warranty nor assumes any responsibility. Sound is very good, especialy a voice but sometimes I hear a little distortions. ••• Jan 5, 2020 · I did replace OPA1612 for OPA1656, and also switched ADC input range for the 1. I TI’s OPA1612 is a SoundPlus™ Audio Operational Amplifier with 1. 6fA @100 Hz), and the voltage noise favors the 627 only slightly (4. In your simulations you seem to use a purely resistive load (32 ohm). same opamp either way . Last edited: 2018-01-23 12:20 pm More options OPA1611, OPA1612 www. I'm hoping this community could be of help. Some features: 1. I opened one SO-8 package and put it under the microscope in our workshop. What do you think will be the opa1612 distortion now that the available amount of feedback at 1khz has lost 60db ? ••• May 8, 2011 · Speed is an issue, though. The OPA161x family of bipolar-input operational amplifiers achieve very low 1. 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. Some will point out the OPA1612 (which is even better) or the OPA1656. Lots of high performance models hate sockets. 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. 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. The OPA1612-Q1 op amp is unity-gain 0. 7 pA/sqrt(Hz), which fits better with the curve. The idea is to use it as an output buffer for my standalone volume controller/source selector with the direct headphones drive capability. It enabled the use of better components (actual measured performance) that otherwise 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. I would be afraid of that chip in noninverting unity gain buffers. Last edited: 2020-10-05 9:04 pm More options Jul 30, 2021 · If I could also request test of: OPA1642 ~ 2 Euro OPA1656 ~ 2. Dec 25, 2019 · Mike just answered an email I sent him regarding the quality of the stock Purifi input board. OPA1656 sounded worst, Muses 8920 sounded best. Dec 12, 2019 · opa2211 SO-8 Powerpad Exposed Pad Jul 5, 2006 · Since CMOS parts tend to top out at a mere 5. OPA1612 on paper has lower voltage noise but whether its lower noise in practice depends on the circuit impedances. 1 kOhm - 1 MOhm 4). It's best use as an alternative to opa1612 when noise is not a big concern. 1nV/root Hz at 1kHz with a 10Hz 1/f corner and will cheerfully drive 600 ohms. 5mA max Mar 17, 2019 · A quick snapshot of the OPA1656 performance specs: 2. 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. 1nV/√Hz Noise, Low THD and Precision. I had read it many times before posting this threat. Jul 11, 2022 · Found a few interesting opamps on TI website: OPA1612 - bipolar input transistors, 0. 000130% Although the price was also cheap, It is a pity that NS was absorbed by TI and was abolished after losing the brand power competition with BB. Gain stage combined with LPF 50-80kHz, OPA1612 probably composite but not necessary yet. I succumbed to the heat a bit, but really in the framework of decency. TL074 is easily surpassed by OPA1644, that's a no-brainer. Jun 8, 2023 · THD=-117. I payed 6. 0mA typical supply current, 4. Yes, it's a very subjective question, so what I am looking is the highest class of sound -- In my opinion, also as said by Tangent, the openness and the cleaness of OPA627/37 put them into a higher league that OPA2604 and LT1364, both of which are very May 19, 2017 · OPA2211A/OPA1612 also sound a bit better than LM4562, IMO. 5mA max May 19, 2017 · Something better than the LM4562? Jan 14, 2019 · I bought 10 OPA1612 from a chinese ebay seller. The OPA1656 immediately raised my attention, plus there was/is a long thread about it on diyaudio. Ordered the eval module to get a head start*. He gives strong recommendations for some applications and also caveats about ill-informed op amp rolling. 5V continuously, and since +-10V is sufficient to drive the Purifi modules at their max output (which they cannot do continuously, mind you), I Aug 30, 2019 · Integrated opamps al cheap and space saver, but limited in their parameters. I went through several iterations and settled on JFET buffers to raise the input impedance. 10 Ohm - 10 kOhm, 2). 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. Dec 5, 2012 · I/V using opamps Aug 22, 2007 · Hi Ryssen, Having had a quick look the data sheet of the LM4562 August 2006 and of the LM49860 June 2007, the differences I detected were at the end of the documents : no mention of "banned substance compliance compliance" at the end of the LME49860 datasheet. ti. 3 MHz. Wouldn't it be necessary to check the stability with a complex load, at least with a capaci 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 Feb 11, 2021 · According to the TI datasheets OPA1612 has less noise than OPA1656. I noticed a low-cost headphone amplifier board based on 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. com In no case did I have too high expectations regarding the sound Jan 1, 2019 · OPA1612 can handle the current from a single ES9038PRO channel. The other thing to look for is what the current rating is. 707dBc=0. Cross-reference your readings with the manufacturer specifications. I'd like to have a crack at making a decent DAC to level up my elec skills. Discrete are all diameter opposite. The bottom line is that different markets need different specs and companies optimize products to match the market. 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. Oct 29, 2009 · diyAudio Donor. 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. Members Market Swap Meet Group Buys. I hesitate to recommend those without simulating the circuit. 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). May 3, 2022 · Its not immediately clear what would upgrade NJM4580 which is already quite low noise. The cheaper ones will have a reduced inductance as current goes up. Outside of this range of temperatures, we don't guarantee the device will meet its datasheet specs. 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. Tested a lot of OP, including LME49720, OPA1612, OPA1642, MUSES8920 and MUSES8820. 8 or 2. 5Vrms signal, 80-kHz measurement bandwidth; 53 MHz gain bandwidth product, 24V/us slew rate >100mA output current; 4. Don't forget enough stacked film caps on the +-15v rails. Aug 24, 2012 · hi i wanted to know if anybody have used the above opamps. 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). EQ version has 4 chanell so has 4 capacitors. One S300iu integrated amplifier | Stereophile. The rail-to-rail output swing, within 600 mV with a 2-kΩ load, increases headroom and maximizes dynamic range. 7 EUR at Mouser. 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. Now I use OPA1612 for i/v and LPF, distortion is gone but sound is flat. 55), but in inverting mode only. OPA1611, OPA1612 www. Jan 6, 2020 · So, you try different devices and measure. In addition, another possible consideration is with the opamp VCC- connected to ground, then the opamps are running with inputs and outputs offset to within 3 Jan 20, 2018 · The 1612 isn't much of a pick for DC specs amongst bipolars though, something like the ADA4075-2 does better in application. But, for me, I simply don’t care for monolithic OPAs. 5 MHz LM4562, 55 MHz OPA2134, 8 MHz A 1 metre cable with polyethylene dielectric has its first resonance at 50 MHz, a 1. Dec 11, 2018 · Featured Vendors The diyAudio Store Parts Connexion miniDSP DIY HiFi Supply. Diy DAC/amp with PCM2707 Jan 6, 2010 · I have an Onix XCD-99 which is basically a Music Hall CD-25. Mar 17, 2019 · We tried OPA1612, OPA1656, NE5532, and Muses 8920 opamps in Rohm BD34301EKV Evaluation Board (which came with 5532's installed). Also the OPA1612 does have the highest quiescent over the other opamps we're talking about it will be the hottest. All external compensation. My workshop is for fun and not to produce a product. I'm at the first hurdle, finding accurate footprints/models to Feb 17, 2023 · Hello, guys. That's 36dB worse than the opa1612, not 50. 1-nV/√Hz noise density with an ultralow distortion of 0. 2021-07-22 2:23 pm #2,481 2021-07-22 2:23 pm NJM2068 is installed and I have some OPA2134 and OPA1612 available. Also intend using Opa1612 for buffer ,inverting unity gain voltage follower. Mar 17, 2019 · And I would bet that the amplitude of each step is too small to actually reach the slew rate of the amplifier. 15ppm, intermodulation way below that, 1. We do not vet any members. Unfornately the 64 bit version crashes all the time after some time of simulation, I can not use it, and that was also the case past year, so I did replace the 32 bit version again and that works oke, reason I do not now, maybe mailing the writer of the Feb 11, 2021 · looks very similar to the eighth image from post #2 of Bel Canto's S300i/S300iu - driven by dual mono Icepower amplifier modules with switch mode power supply - go to Inside the Bel Canto S300i integrated amplifier | Audiokarma Home Audio Stereo Discussion Forums and Bel Canto e. 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. Remember, to actually hit the specified slew rate of an op amp, you have to create a large enough voltage between the op amp inputs to direct 100% of the tail current into the compensation capacitor. These discrete regulators already exceed the PSRR and self noise of the May 19, 2004 · If you're looking for an opamp substitution, I'd try OPA1642 to replace OPA2604. I use better parts and designed converter on 4 layer board. They are ~6. Aug 28, 2009 · In comparing the spec sheets of OPA627B and ADA4627B-1, the current noise specs are identical (1. Aug 15, 2014 · Wel I have tryed th model OPA1612 and it works in the 64 bit version, but not in 32 bit version, I get just offset and no amplifing effect. Opa1656 has good phase response at high frequency. Pin can be left floating or connected to any voltage between (V–) and (V+). 35 amps. Jul 4, 2021 · Sounds like you need some sort of EQ system to get the effect you want, opamps just all work the same, some are a bit noisier, some have higher distortion, but they don't do florid adjectives, just reproduce a signal to a high accuracy (if all is working well). He does test the TL072 against some more modern ones, but not the OPA1612 due to there being no DIP version I think. 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. ••• Nov 17, 2017 · Hi, after a while i decided to make a dual mono DAC board es9038q2m. A fully differential amplifier with excellent audio specs. I repeated measurements a few times, using sets of resistors: 1). Dec 25, 2019 · The OPA1612 may be strained close to its limit, but the LME479xx family exists even in a variant that can output 100mA. While improving on the flaws, some of the IC's SMD legs gave up and broke off. I initially saw both the low input impedance and the signal inversion as potential drawbacks. Dec 19, 2012 · Funny how i just found about the OPA1612(while browsing Ti webpage)this thing looks phenomenal on paper but what about listening how does it sound compared to the OPA2228 im curently using on my soundcard(and love it)? Heres the question about caps(so i dont make another thread about it): Will May 4, 2016 · I’ve been following the thread "New Audio Op Amp - OPA1622" for a while and at some point decided to make myself a new universal buffer/headamp based on the OPA1622. Now I grant you, price is not an indictor if it is the best choice. It might require more capacitance in the LPF of the I/V stage to keep it happy Vs the others. What's not to like with that, and all the other SoundPlus family? Craig ••• 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. I use Rcore transformer and LT1674 to main 5v, then LT1674 on mainboard to main 3. The new national opamps are also there with extreme slew rate of 1900v/usec just like AD815. The LME49860 is another option. May 15, 2022 · Featured Vendors The diyAudio Store Parts Connexion miniDSP DIY HiFi Supply. Feb 11, 2021 · Dont make me laugh, if you can't hear the difference 5532 vs OPA1612 than you should not be very concerned about SQ (in your case). Mar 2, 2020 · And unity gain stable without any caps ? Show us then. In any case I would try the first of them, because it is easier to design, and if the performance is not as good as expected, is easy to change the opamp, while discrete solution may require a complete re-design with its time consumpting cons. Generating higher levels of H2 would be fun. 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 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. After the OPA1656 I 'discovered' the OPA1637. Also they are very hot. With a low price and nevertheless minimum THD. Some people have more recently started using OPA1656, which are very good, although they are a little less authoritative in the bass. Source impedance, inverted or not, rail voltage, ad nauseum specs. Feb 22, 2017 · This are the UCD250LP OEM Specs: Required input level for max power: 6,84V Voltage gain: 13,3 dB Audio Input impedance: 1,8KOhm Source Impedance: 100 Ohm And this ones from minDSP: Maximum output level: 2 V Output Impedance: 560 Ohm This is the schema I'm planning if no buffer present (for each channel): Oct 25, 2023 · Featured Vendors The diyAudio Store Parts Connexion miniDSP DIY HiFi Supply. 000015% at 1 kHz stable and provide excellent dynamic behavior over a • High Slew Rate: 27 V/μs wide range of load conditions. Jul 5, 2006 · Thanks for the link. Optional parallel input amps-2x LT1115/AD797/OPA1611 or OPA1612 for MC 2x OPA1641 or similar or OPA1656/OPA1642 for MM Cartridge load components can be altered without soldering. 50 cents or 5 bucks, Cheap. IMHO the outcome was mostly decided by how the opamps responded to the RF coming out of the dac chip. Jul 4, 2021 · The article linked below isn't the be-all and end-all on op amps tests, but very informative. Real low-voltage stuff (think 1. Aperiodic step response with 100ns rise/fall times. 3v for oscillator and other 3. 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. 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. It appears that the OPA1611/2 have a lower noise voltage, wider bandwidth and higher slew rate than the OPA134 and OPA2134's. Jul 5, 2006 · Standard opamp for that has pretty much become OPA1612. (If I am not wrong OPA1656 is a really modern OP Amps from March 2019 vs 2017 for the OPA1692). Cheers, Greg ••• Oct 7, 2020 · Hi :) I've a bit of experience with Altium Designer, C/PP, general MCU stuff, things like I2C and so on. 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. Mar 17, 2019 · TI's SoundPlus opamp family are astonishingly superb designs. 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. May 10, 2022 · You don't have to use SA, distortion level obvious on oscilloscope screen. Apr 18, 2020 · TI continues to surprise us with top notch products. Dual AD797 AVCC regulators might be slightly better yet, and can also be used for ES9028PRO. 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'm using the OPA1612 dual opamp in a commercial design. 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've had an OPA1612 lose its mind in a filter circuit where an LME49720 worked just fine. I’m guessing a gain of 10 would necessitate an Rf in the 150R-180R range. Nov 1, 2020 · As the title suggests, it is opamp based, and is hardly unique, but it has some unusual features and has stellar specs and is pretty easy to build. 000015% THD, even lower than LM4562 OPA1656 - FET input transistors, 0. Feb 17, 2023 · The OPA1622 is a slow device compared to the OPA1612/OPA1656. 10 kOhm - 10 MOhm Set 1 produces no visual deviation at all. Normally a DSD DAC chip should have built-in return-to-zero circuits or other countermeasures against intersymbol interference. The AD opamp is more expensive though than the OPA1612. EX version has 2 channells. There are gain-of-8 specs, with an optimal Rf being 200R. Jan 24, 2020 · Have you also considered other opamps for output stage. Is this layout ok, even though it's not complete ••• Apr 30, 2021 · Normally you'd regularily search in the manufacturers new product listings first for any new interesting products. . It's a killer OpAmp, and better suited to non-inverting buffer duties than the OPA1612/2211 Jan 26, 2012 · zergxia I think you'll never see H2 with 1656 <-140-145db if you'll not match the opamps inputs impedance. 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. 100uf per rail has served quite well for ES9038Q2M dacs, have to see if still sufficient when using ES90038PRO with higher currents. Cheers 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 Mar 17, 2019 · First, I want to clarify what the recommended temperature range for a device really means. This is the range of temperatures, over which the device is guaranteed to meet the specifications in the electrical characteristics table. At a gain of 60dB, the THAT is only down to -82dB. Jun 5, 2023 · I have used the OPA1612, AD797, LT1115, OPA1642 and OPA1656 in phono/analog preamp stages for a while now and have conducted extensive listening tests, sometimes double blind, sometimes blind, sometimes as just an unannounced "impartial" observer to listening/comparison/"shoot out" sessions. For the case of Oct 29, 2009 · The LM833 has very similar datasheet specs to an NE5532 (the 833 is a little quieter, the 5532 a little faster). Jun 5, 2023 · Just because they are not fake doesn’t mean they’re ”good” - they may be fall outs that don’t meet spec. Jan 10, 2016 · He talked to me about OPA1611's versus OPA134's as well as the OPA1612's versus OPA2134's. I won't know for sure until Mark reveals the opamp device identifications. 6) Output XLR balanced, ideally if with a big-good permalloy trafo. Strange but found too many times to ignore it. Even AD797 or OP627 cant hold a candle vs OPA1612 in terms of SQ - the difference is HUGE! My preamp sounds best with OPA1612 for gain and OPA2192 as buffer. I used OPA1612 and analog schematic comes form datasheet. 80 EUR for all ten. Customers can post any issues in those threads as long as it is done in a civil manner. Find parameters, ordering and quality information. 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. Jun 5, 2023 · Although specifications of OPA1612 (bipolar) indicate they are superior to that of OPA1642 (JFET inputs) in practice OPA1642 performs slightly better. 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 Feb 25, 2011 · These I want to replace first. 9nV/rtHz broadband voltage noise; 6 fa/rtHz broadband current noise-131 dB THD+N at 1kHz, 600 ohm load, 3. 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. 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. 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. 2. 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. He’s optimized the distortion for the OPA1612 into the TPA6120A2 for lowest distortion and that’s not what I’m about. A couple of things surprised me a bit. I has very little phase margin at unity gain. Mar 17, 2019 · A quick snapshot of the OPA1656 performance specs: 2. Bur OPA1612 is not a good choice for this Nov 14, 2021 · You can try feeding 0 data 0 data 0 data and a doubled clock into a DAC with native DSD interface, but I doubt if that will help. Apr 28, 2023 · Correct different suffix 1612 is a 1612 they all link to the same datasheet its kinda comical to say a equivalent for a 1612 is a 1612 likely why the original suffix was chosen for the lower cost you would likely need to ask TI the difference. Jan 6, 2020 · Hi Michael, I have read your interesting article in the March 2021 edition of AudioXpress. Regular version has some compromises in oscillators, power supply. I have diyinhk es9038pro board and try muses8920 for i/v and LPF. Jul 29, 2022 · OPA1612 USB converter is my version of Amanero. 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. PCM1794, OPA1612 . If you pick out something different to try, make sure the mfg doesn't recommend 'no-socket' mounting. Of course layout and bypass design matter along with the basic circuit as shown on the schematic, its not just the chip. At least it is my preference when associated with an AK-449x DAC. S. But in general once you give these opamps +-15V then they can output about +-14. Use of this facility is at your own risk. I can see several places where this would fit very well, like fully balanced post-DAC 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. But that does not say anything about the SQ. 100 Ohm - 100 kOhm, 3). It turned out that these OPA1612 are cheap TL082 FET Opamps as you can see on the photos. Mar 11, 2014 · The thing to look for in inductor specs is whether or not the specified nominal inductance value stays constant as a function of current. For a lot of these op amps, the parameters which fall out of spec may not make a hill of beans difference in an audio circuit, but make them useless for instrumentation. It has OPA2604 buffer amps that many have replaced with dual OPA627BP's with good results. 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. 00003 THD, Voffset = 1mV - I'm thinking to use this one for servo. P. Paid Member. 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 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). 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. 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. For 40 watts driven by 17 volts the peak current is 2. 8Vrms and remeasured the range -15dbfs. Jun 17, 2017 · If you are willing to sacrifice an OPA1632, then lift the Vcc and Vee pins, insert 1 ohm resistors in series with the power supply + and - rails, and measure the current consumption. TI was going to discontinue the LM4562 and others as well. 9038 recomendation is OPA1612, OPA1656 Mar 17, 2019 · Voltage noise is higher on 1656 at low frequency til 1khz. com with a TI insider involved. Once measured okay, replace the OPA1632. 1 Overview. So i expected to get fakes but i wanted to know it for shure. All diyAudio rules about conduct apply and will be enforced. -60dbfs. 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. I will only tell the fourth 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. 000015% at 1 kHz. Benefit is lower dc offset and less distortion also high open loop gain also superior stability. 5 V - single supply - I would not be surprised to find some common-mode issues. Tangent didn't mention AD826 and LT1364, which are my best choices. ••• Dec 10, 2018 · Mark, thank you for reply good to know that you like OPA1612 as I/V for quality 24 bit dacs do you recomend to try It with not just only pcm1794 but also pcm63, pcm1704 what Is your choice for power supply to pcm1794, analogue and digital : Salas shunt, LT3042, ADM7150, cap multiplier what Is your choice for OPA used as diferential summator / low pass buffer - what do you think about OPA2132 . Just check the rails aren't over +/-18V. 7. Joined 2011. Feb 11, 2021 · Looking at the specs, I would use if for gain, but not for buffering. 5nv/6. 1nv). ADA4625-1/2 are supposed to be even better than the ADA4627-1, though I've yet to try them. 5 metre cable at 33. 5 V) tends to be run inverting anyway since common-mode input range would be pathetic otherwise. Harmonic distortion <0. There are JRC4580 opamps on the TRS inputs and 4 JRC4580 opamps on the 4 main speaker outputs. CMRR is not a big issue. com SBOS450C –JULY 2009–REVISED AUGUST 2014 5 Pin Configuration and Functions D Package OPA1611, SOIC-8 D Package (Top View) OPA1612, SOIC-8 (Top View) DRG Package OPA1612, SON-8 (Top View) (1) NC denotes no internal connection. slskx lbmak zhriy cdb meujaqzpd dbfw blmpd obvub rgqdi gjf
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