Opa1612 diyaudio for sale ebay

Opa1612 diyaudio for sale ebay. CMRR is not a big issue. . I guess it should work this way. OPA1612 Dual Sound-Plus opAmp Burr Brown OPA1612AID ultra low noise li. 1-nV/√ Hz noise density with an ultralow distortion of 0. Jan 14, 2019 · I bought 10 OPA1612 from a chinese ebay seller. SQ was about the same as other ESS-based dacs in that class. Opa1656 has good phase response at high frequency. The OPA727 is single Mar 30, 2012 · I have a Crate VC508 guitar amplifier that many recommend modding by replacing the TL072CP opamp chip. Yet when you complain they suddenly know nothing and they are just a trader. Years later they have tape Jun 16, 2024 · If you can find a good price for any you are interested in on a 'legitimate' site (NOT EBay as there is so much junk on there), I will do better by 20% at least. May 15, 2022 · Featured Vendors The diyAudio Store Parts Connexion miniDSP DIY HiFi Supply. Tested a lot of OP, including LME49720, OPA1612, OPA1642, MUSES8920 and MUSES8820. Mar 17, 2019 · We tried OPA1612, OPA1656, NE5532, and Muses 8920 opamps in Rohm BD34301EKV Evaluation Board (which came with 5532's installed). 15 each) - PR9372 2. 3v for oscillator and other 3. (If I am not wrong OPA1656 is a really modern OP Amps from March 2019 vs 2017 for the OPA1692). Jun 24, 2013 · Sylph-D100 repeat measurements, using OPA1656, LRS-350-36 adjusted to 38V Motu Ultralite MK5 ADC, SMSL DO100 DAC (can drive the output up to 16Vrms) Needs a DAC with 5Vrms out to drive the amp into 20Vrms (100W 4ohms) Dominant 2nd harmonic due to inductor selection. 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 Oct 7, 2020 · Featured Vendors The diyAudio Store Parts Connexion miniDSP DIY HiFi Supply. Jul 24, 2012 · I have the Essence ST, same DAC circuitry as STX I believe. Just check the rails aren't over +/-18V. 000015%) at 1kHz. 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. We do not vet any members. May 19, 2004 · If you're looking for an opamp substitution, I'd try OPA1642 to replace OPA2604. Sep 10, 2024 · 2sk170BL N jfets - 80 total pieces available for sale - selling 1 set of 10 pieces for $80 total; 2sc5171 Tosh NPN driver transistors - 80 total pieces available for sale - selling 1 set of 4 pieces for $48 total; LSK170B N jfets - pending. 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. The OPA1622 is a bit more challenging but I intentionally put a big via in the thermal pad to heat it from below. IMHO the outcome was mostly decided by how the opamps responded to the RF coming out of the dac chip. common mode voltage that I've measured on any op amp. 3 MHz. 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. 000015% at 1kHz. OPA1656: High-Performance CMOS Audio Mar 17, 2019 · The OPA1641 would be slightly better. 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. I'm using the OPA1612 dual opamp in a commercial design. Something like that. He’s optimized the distortion for the OPA1612 into the TPA6120A2 for lowest distortion and that’s not what I’m about. tevatronix (14,901) 99. - high levels of DC precision are generally not required by audio customers (audio equipment makers). 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 Mar 17, 2019 · The OPA1641 would be slightly better. TPA6120 Headphone Amplifier Board HiFi TPA6120A2 Double Channel Headphone Amp Tu | eBay 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. Feb 11, 2021 · i will second the notion of the opa1612 being audibly superior to the ne5532 its a huge difference my daughter who patiently sat through almost 2 hours o bling listening tests on 3 upgraded cd players a nad 546bee with foil film coupling caps and 50 volt 100uf muse bipolar and wima fkp3 . 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. It is not 'hardwired', can be reversed to non-pffb by removing jumpers and RF1-RF4 and of course by changing back the parts. 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. They are ~6. I initially saw both the low input impedance and the signal inversion as potential drawbacks. Sylph-D400 5W 4ohms using 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. Nov 17, 2017 · Hi, after a while i decided to make a dual mono DAC board es9038q2m. All diyAudio rules about conduct apply and will be enforced. Nov 2, 2010 · Try a pull-down load to the negative supply rail to force the NE5532 into class A, just a few mA will really make it sound better. 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. Bad idea. It's supposed to be a stright up replacement but it's about a third of the size. I measured and tagged every jfet with a piece of masking tape. I changed to LM6172 and also reduced the size of the caps in the feedback loop. 1nV/√Hz) and very low distortion (0. 1nV/√Hz noise density with an ultralow distortion of 0. 15ppm, intermodulation way below that, 1. Apr 7, 2019 · I highly doubt that your ears can make a difference btw 0. ••• Jul 4, 2021 · Featured Vendors The diyAudio Store Parts Connexion miniDSP DIY HiFi Supply. My statements were verified: - OPA1611/1612 are optimized for better distortion than the OPA211 (already pretty good). Vendor's Bazaar. It could sound pretty good, but one could get sound just as good from IC opamp designs. It will perfectly work. Currently we are finding alternative courier. At this point noise and ultra low noise supplies might be the last area I should put more effort into for this interface. 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. 50 12% off. this dac use opa1612, eBay" SNY-30A CSR8675 PCM1794 Jan 5, 2020 · How many layers does your board have? I design a ES9038Q2M board with ADP151 for AVCC and Opa1612 buffer for AVCC_L, AVCC_R on 2 layer pcb, one layer is solid gnd plane and only get one channel 2nd harmonic at about -110db, 3rd -120db, another channel is -120db, -108db respectively, opamps for IV and SE converter are also opa1612, do you have any suggestions? Dec 11, 2018 · Featured Vendors The diyAudio Store Parts Connexion miniDSP DIY HiFi Supply. Diy DAC/amp with PCM2707 Jan 26, 2012 · The diyAudio Store; Parts Connexion; Mini DSP; If there is one for sale, I should buy one. He does test the TL072 against some more modern ones, but not the OPA1612 due to there being no DIP version I think. You have only 2 examples measured before system 2 was available: Jan 6, 2020 · So, you try different devices and measure. 8% Buy It Now. Jan 5, 2020 · I did replace OPA1612 for OPA1656, and also switched ADC input range for the 1. Regards, Oleg Regards, Oleg ••• 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). I went through several iterations and settled on JFET buffers to raise the input impedance. Is this layout ok, even though it's not complete ••• The OPA1611 (single) and OPA1612 (dual) bipolar-input operational amplifiers achieve very low 1. It turned out that these OPA1612 are cheap TL082 FET Opamps as you can see on the photos. Standard opamp for that has pretty much become OPA1612. 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 remeasure DR/SNR and THD+N as well, because OPA1656 is Mar 17, 2019 · All diyAudio rules about conduct apply and will be enforced. My workshop is for fun and not to produce a product. Cheers, Greg ••• Jan 6, 2020 · Well, I was referring to something like this and no need to include it in the feedback loop. PCM1794, OPA1612 . Oct 8, 2001 · My choice would be OPA1612 oder ADA4898-2. Top brands, low prices & free shipping on many items. 8Vrms and remeasured the range -15dbfs. 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. 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. Generating higher levels of H2 would be fun. Much smaller caps work fine with LM6172 because of its phenomenal slew rate. For the case of 3 days ago · Sony TA F444ESX I have here for sale this amplifier in perfect working condition and in great visual aspect. C $10. I got a TI NE5532 off ebay. 2k Resistors (purchased from Parts Connexion for $1. 1-nV/ √ Hz noise density with an ultra low distortion of 0. The Jul 1, 2024 · diyAudio provides this forum for the convenience of our members, but makes no warranty nor assumes any responsibility. OPA1656 sounded worst, Muses 8920 sounded best. So i expected to get fakes but i wanted to know it for shure. 0001thd and 0. 3v components, ltc6655 and opa1612 for AVCC and VREF, tps65131 +-15v and low voltage through LM317/337. EBay is okay if it's for a reasonable price on there, showing me an IC worth $20 going for $1 on EBay is not realistic. Top Rated Seller. 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 reason is simple: OPA2604 is out of production for a long time so rebranding any old dual opamp is then interesting for the guild of counterfeit producers. Thank you Aug 22, 2009 · I talked to a TI/B-B applications engineer today. 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. Mar 17, 2019 · Voltage noise is higher on 1656 at low frequency til 1khz. Members Market Swap Meet Group Buys. OPA1622 is a bit more smooth and sweet, while OPA1612 is a bit more nature and more details. Aug 27, 2024 · Here is what I have left over: - Diotec Electronics Soft Recovery Bridge Rectifiers (these are VERY hard to get & I had to purchase a bulk amount at $21 each straight from Diotec Electronics) - Holco 47k Resistors (purchased on eBay from West Florida Components for $1. 11. I agree that OPA1622 will be good for SE output stage or the head phone amp of the I/V STD (U3). For example, tevatronix is listing various MJ & MJL output transistors and BB/Ti OPA1612. Brand New. OPA1656: High-Performance CMOS Audio Op Amp . First project :: XU216/AK4499/OPA1612 :: DAC Pinout & circuit examples. But their sound signatures are slightly different. 7 EUR at Mouser. Jul 24, 2017 · It is advised that the small-signal bandwidth of a buffer within the loop be at least 3 times main amp small-signal bandwidth divided by overall noise gain. We will contact you once we are able to have access on international shipping. OPA827 wins over both of them though ••• Jul 4, 2021 · The article linked below isn't the be-all and end-all on op amps tests, but very informative. 1nV/root Hz at 1kHz with a 10Hz 1/f corner and will cheerfully drive 600 ohms. Did you mean ebay , i am scared to buy from there eletronic ICS. Funny how the fake sellers always seem to know what a real one looks like for their listing photo. Use a simple resistor, or a J-fet with the IDSS trimmed to 3mA~5mA. But, for me, I simply don’t care for monolithic OPAs. 33 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 Mar 17, 2019 · TI's SoundPlus opamp family are astonishingly superb designs. 005% thd at 1khz , not 20khz, yet 3040 years ago some amps would beat the -120db thd under 10 w/8ohm. I payed 6. Jun 24, 2013 · If you have gamerpaddy's module, just bypass the opamp section of D400 or D100 (solder a wire from the input terminals then solder it directly to input coupling caps, attached pic). It has the most stable input capacitance vs. Find many great new & used options and get the best deals for 2 PC Opa1612 Dual Sound-plus OPAMP Burr Brown Opa1612aid Ultra Low Noise 0l at the best online prices at eBay! Free shipping for many products! 2 days ago · The OPA1612 bipolar input op AMP achieves very low noise density (1. Jun 24, 2013 · I got a note today from JLester / or someone managing his ebay account: "Due to Covid-19 our local post office here does not have international shipping yet. Use of this facility is at your own risk. Nov 6, 2014 · eBay item 121480769848 Techtube Blackburn E813CC Matched Pair Brand New Ultra RARE | eBay Kees Featured Vendors The diyAudio Store Parts Connexion miniDSP Nov 2, 2018 · I am trying to wrap my head around the preference for DAC >>> OPA1612 >>> HPA1 versus DAC >>> OPA1612 >>> TPA6120 or even DAC >>> OPA1612 >>> LJM HPA2 PRO (With Parallel 4x OPA1612) Right now I am going back and forth between the TPA6120 and the LJM HPA2 PRO (With 4x Parallel op-amps). Any question feel free to ask, more Oct 23, 2018 · Regarding the small chance to find fake OPA2604: fake OPA2604 are often used in cheap/Chinese devices just like they are sold by Ebay sellers. Aug 13, 2021 · I ask since I am considering purchasing various power transistors (and some op-amps) from them and I would like to know if they are legitimate/reliable/safe sources. Oct 23, 2018 · Commercial Sector Swap Meet Group Buys The diyAudio Store my denon dac which use 4 pcm1704 . May 18, 2021 · The photo for the ebay listing looks like a real OPA1612, as usual. I use Rcore transformer and LT1674 to main 5v, then LT1674 on mainboard to main 3. Everything is working just fine,sides constructed in solid walnut with the original screw covers, seeing by having more equipment of the genus. 5 metre cable at 33. Harmonic distortion <0. 80 EUR for all ten. -60dbfs. Customers can post any issues in those threads as long as it is done in a civil manner. The TL072 is around a half inch rectangle with 8 legs going into a socket. Search Featured Vendors The diyAudio Store Parts Connexion miniDSP DIY HiFi Supply. 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 2 days ago · Find many great new & used options and get the best deals for New Lot TexasInstruments OPA1612 2-Circuit 8-Pin DIP Operationa Japan New at the best online prices at eBay! Free shipping for many products! Mar 15, 2024 · The OPA1611 (single) and OPA1612 (dual) bipolar-input operational amplifiers achieve very low 1. These devices also have a high output drive capability of ±30 mA. (1/3 of opa1612 cost) with very high symmetry of the input stage 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). Buy & sell electronics, cars, clothes, collectibles & more on eBay, the world's online marketplace. The 1612 is rather expensive at element14 $15 dollars, but I only need one I think with this Technics MASH player. It's best use as an alternative to opa1612 when noise is not a big concern. I opened one SO-8 package and put it under the microscope in our workshop. What's not to like with that, and all the other SoundPlus family? Craig ••• Feb 11, 2021 · The next op-amp I am planning to try is the OPA1612 but perhaps the DAC is the limiting factor and perhaps the measurements will look very similar to the OPA2134 even if the OPA1612 is a really good op-amp. Which OPAMP in DAC for Jun 24, 2013 · I'll also try OPA1612. Benefit is lower dc offset and less distortion also high open loop gain also superior stability. Which OPAMP in DAC for smoother sound TL072 or OPA1612 . 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. It has OPA2604 buffer amps that many have replaced with dual OPA627BP's with good results. He gives strong recommendations for some applications and also caveats about ill-informed op amp rolling. Jun 9, 2024 · The OPA1612 (dual) bipolar- input operational amplifiers achieve very low 1. These devices also have a high output drive capability of ±30mA. 022uf 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. Jan 6, 2010 · I have an Onix XCD-99 which is basically a Music Hall CD-25. Jan 24, 2017 · OPA1612 adapter PCB Both OPA1612 and OPA1622 are top of the line audio OP amplifiers. Although you need OPA1612 and good 4 layer layout on an external module to get 106dB SINAD (5W 4R) on both D100 and D400. Was: C $11. It enabled the use of better components (actual measured performance) that otherwise May 19, 2004 · well thats confusing, OPA1641 for me is superb and beats out 1611 without any trouble. 000015% at 1 kHz. The OPA1612 provides rail-to-rail output with a swing of up to 600mV from the power rail at 2-k loads, helping to maximize dynamic range. So, it is a different design and chip. Home. Jul 5, 2006 · IIUC the folks at Sparkos designed the board for Allo or they collaborated on it. May 4, 2016 · I fried one board at first and thrown away two chips while learning but in the end it worked with the solder paste and the hot air solder station for 40$ from ebay. Jul 25, 2016 · Hi Phase, Thanks. Attached PFFB implementation on the bottom PCB. <edit> As for why people say FET input sounds better - its most probably about RF immunity of the LTP input. 5 MHz LM4562, 55 MHz OPA2134, 8 MHz A 1 metre cable with polyethylene dielectric has its first resonance at 50 MHz, a 1. vopnj smdf gzfo svt tvydcw pfnd yixjodt xrfvs gmkwv fjxaiumk  »