Opa1612 diyaudio price. With a low price and nevertheless minimum THD. Dec 11, 2018 · My plan is to use a PCM2707C for USB to I2S converstion, a PCM1794A will be used as the DAC and the amplifier stage will contain a pair of OPA1612 and a OPA1622. The AD opamp is more expensive though than the OPA1612. Oct 8, 2001 · My choice would be OPA1612 oder ADA4898-2. 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. ••• May 3, 2022 · Its not immediately clear what would upgrade NJM4580 which is already quite low noise. OPA1656 sounded worst, Muses 8920 sounded best. I've seen mention of these on various threads in this and other forums. I payed 6. 34. Sound is more "color", and "massive". 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. And a short video 30fps 400X, to see how that looks online. Other big problem is that DAC+LPF cannot help in IMD measurements, especially multi tone. 1N4007, 80 for 1 US $, and just $0. 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. Power it off, and check ohm values from pin 1 to 4, 5, 6 are infinitive. You can check up and compare prices in your area. It ensures a very low noise density of 1. Jan 5, 2020 · After some delay due to work load, some time wasted with talking and arguing to some holes in the wall in the Digital forums, and a false start with the PCB (used the wrong footprint for the OPA1612 DFN) here's the board with the composite I/V stage, OPA1612 + BUF634A and OPA1611 output. A gain of 1000 overall, but a gain of 10 at the CFA will keep the 1612 at 100 maximum, and that’s one responsible way to do a 60dB main gain stage in a mic pre. com/blogs/news/opa2156-hifi-in-cmos. I love details clarity, soundstage - listen to rock classical and vocals. More options Jan 6, 2020 · Good morning all, I was not actually aware all this composite amp work using the TPA6120A2 was going on. Benefit is lower dc offset and less distortion also high open loop gain also superior stability. Last edited: 2022-03-30 9:29 am 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). They are ~6. In parallel, talking with Jan Didden, I had embarked a similar trek that now show up on page 42 of the March 2021 AudioXpress. these chips all have different requirements, so this board is a bit dubious. 000015% at 1kHz. A comprehensive comparison between OPA1612 and OPA2156 (and other opamps) could be read here: https://quantasylum. Pin 2-4 are 130ohm, 2-5: 0ohm, pin 2-6: 4300ohm. 1 nV/√Hz noise density with an ultra-low distortion of 0. So i expected to get fakes but i wanted to know it for shure. 5 US cents each. Home. The plan is to build the amplifier stage directly as described by TI in their reference design tidu672c Voltage conversion for the PCM2707 and PCM1794 will be done by two LP5907 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. 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. Members Market Swap Meet Group Buys. The OPA1612 offers rail-to-rail output swing to within 600 mV with a 2 kΩ load, which increases headroom and maximizes dynamic range. the pcb also only has DIP8 opamp type placement and this is not compatible with opa1622 or opa1688. Is this layout ok, even though it's not complete ••• Apr 26, 2018 · For the way that I arrived at the following evaluations, please refer to my previous two posts, #4603 (located here: The diyAudio First Watt M2x) and #4727 (located here: The diyAudio First Watt M2x). 1-nV/√ Hz noise density with an ultralow distortion of 0. Aug 24, 2012 · i tryed lme49722 opa2134 and opa1612 ,--. Apr 16, 2021 · Lets do the maths, to buy them directly from TI is USD$2. It turned out that these OPA1612 are cheap TL082 FET Opamps as you can see on the photos. The TI OPA1612 dual operational amplifier benefits from excellent technical characteristics, allowing very good electrical and audio performance. 3v components, ltc6655 and opa1612 for AVCC and VREF, tps65131 +-15v and low voltage through LM317/337. Is it worth doing this upgrade, or replace it with a DIY, with one of these "Premium DAC" as AK4490 Jan 24, 2020 · Have you also considered other opamps for output stage. CMRR is not a big issue. 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. 91 mm 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). 707dBc=0. Actually, the OPA1612 and OPA1688 are available in SO-8, not bad. qty10; 9V/uSec;-120 THD; 4. 50 Rupees, or about 3. 5 MHz LM4562, 55 MHz OPA2134, 8 MHz A 1 metre cable with polyethylene dielectric has its first resonance at 50 MHz, a 1. how do they sell them below their cost price ??? Jun 5, 2023 · 817 / 1010 opto coupler old prices: Single - 5 Rupees 5 units - 4 Rupees (5 US cents or so) each 20+ units - 2. Adeleparts2010 per 1pcs is $2. 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. 5 metre cable at 33. The OPA1612 is used by Topping/SMSL and I believe Gustard is using it too and also in the Latest Topping Preamp that everyone is gossiping about…. 3. 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. 3v for oscillator and other 3. 7 EUR at Mouser. May 8, 2011 · Speed is an issue, though. I need a very stiff supply since every ounce of power is important specially when 2 ohms load is being tested in my upcoming module. The 2134/4134 prices have gone through the roof and are 6x as much! Jun 25, 2021 · While looking for completely different things, I found this old magazine by chance from November 1992 Radio Electronics (November 1992) : Free Download, Borrow, and Streaming : Internet Archive and an excellent diy power amp project at hard to beat price with LM1875 and AD711 - go to the The OPA1611 (single) and OPA1612 (dual) bipolar-input operational amplifiers achieve very low 1. Not sure why. The OPA1612-Q1 device is available in a SOIC-8 3. Mar 25, 2021 · which dac chip are you using? the board says its for 9018/28 and 38 lol. 8820 is 85% of Muses02 at fraction of the price, but 02 is still better to my ear. Does this indicate that 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 . • Wide Supply Range: ±2. May 19, 2017 · An OPA1612 has slightly better specs than an LM4562---less noise and distortion, faster, and more output voltage swing. 25 V to ±18 V Device Information(1) 2 Applications PART NUMBER PACKAGE BODY SIZE (NOM) • Professional Audio Equipment OPA1612-Q1 SOIC (8) 4. I have a Technics MASH cd player with the SMDs type of opamps needed. The device is specified from –40°C to • Rail-to-Rail Output +125°C. I use Rcore transformer and LT1674 to main 5v, then LT1674 on mainboard to main 3. 5nV√Hz, and almost R-R output, all at 2mA. 11 ea. TI's R&D as a percentage of total revenue in 2020 is about 10. 5%. Also pricing for 1000+ isn't really that expensive for opa1656, opa1602, opa1612. 6 mA per Channel package. For the case of May 19, 2004 · Commercial Sector Swap Meet Group Buys The diyAudio Store More instance try an opa1612 or 1602 on such adaptator way buying the Lundahl at their street price Jun 5, 2016 · Hello guys, I have a Profire 610 in excellent condition. OPA1656: High-Performance CMOS Audio Mar 17, 2019 · If price is your concern, get some 5534 or perhaps njm8068 njm4585. 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. Maybe it's too soon for anyone to have obtained and evaluated samples, but -- well -- has anyone yet? They are supposed to be great audio op-amps. 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? Jan 26, 2012 · ES9038Q2M's price is less then half of this LPF BOM price, but this was not an issue. I'll change the 4558 for a lm4562 or opa1612 first. 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 Aug 22, 2009 · I just noticed today on the TI web site that the OPA1611 (single) and OPA1612 are finally reality. Mar 17, 2019 · That tells you 2 things: we sell A LOT of chips, and even at prices you may think are low, they have decent margins. Jul 4, 2021 · I have some vintage audio gear that I would love to keep period-correct, but the price surely has sky-rocketed. This combination will sound slightly more clinical than the OPA2228/OPA2822 combination. Opa1656 has good phase response at high frequency. Dec 10, 2015 · All diyAudio rules about conduct apply and will be enforced. I initially saw both the low input impedance and the signal inversion as potential drawbacks. Vendor's Bazaar. ••• Mar 17, 2019 · The OPA1641 would be slightly better. OPA1612 on paper has lower voltage noise but whether its lower noise in practice depends on the circuit impedances. same opamp either way . Apr 8, 2021 · Give a test ) I have tested the OPA1612 / 1656 / 1642 / Burson Audio V5i, Muse 02 / Muse 03, OPA2210, OPA1622, OPA1692, I keep on saying that the 2210 is the best for me at least with my amps. Jun 5, 2023 · Trying to figure out whether they're fake is part of the fun Here's my OPA1612 from Ali (sorry for the residue, I didn't bother cleaning the chip): Upon testing it seems to have a 150nA input bias current. While improving on the flaws, some of the IC's SMD legs gave up and broke off. 000015% at 1 kHz. ••• Jun 25, 2024 · OPA1612 has such a tiny marking, the symbol's thickness is 4um, and the minimal visible elements are 1. I went through several iterations and settled on JFET buffers to raise the input impedance. YES, they are a bit expensive (~$5-6 each) but compared to the cost of the rest of a system, it's well worth it. More options Jan 14, 2019 · I bought 10 OPA1612 from a chinese ebay seller. ••• Mar 17, 2019 · We tried OPA1612, OPA1656, NE5532, and Muses 8920 opamps in Rohm BD34301EKV Evaluation Board (which came with 5532's installed). I noticed a low-cost headphone amplifier board based on the TPA6120 chip. He does test the TL072 against some more modern ones, but not the OPA1612 due to there being no DIP version I think. 90 per qty 1K or for qty 1-99 is USD$5. It has the most stable input capacitance vs. Goes to show you how good it really is. LME49720 sound is boringand too light. First project :: XU216/AK4499/OPA1612 :: DAC Pinout & circuit examples. 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. It sounds awesome, for the price it is a must have ! I also updated the brick PSU and got a Leicke -German quality brick PSU. At least it is my preference when associated with an AK-449x DAC. And ADA4627, which appears intended as a direct replacement (a decompensated ADA4637 exists as well). 1-nV/√Hz as well as an extremely low distortion level of 0. 005 each in 1000 quantity. 022uf Jan 25, 2018 · For a microphone pre-amplifier, methinks the OPA1612 cannot be beat---the combination of low noise, low THD, high common-mode/power supply rejection, fast slew rate, and rail-to-rail operation is simply the BEST. OPA1656: High-Performance CMOS Audio Op Amp . 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. 50 each only six months ago. Input pins 1, 2 are ok (5vdc and 0v). 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. Apr 15, 2023 · OPA1612, Muses 8820 By the way, I prefer 02 sound over other OPA even if price difference is taken into account. Oct 15, 2014 · Texas Instruments' OPA1612 (dual) bipolar-input operational amplifier achieves very low 1. 90 mm × 3. Sep 14, 2022 · Thanks for the infomation. So about the price of an OPA1612. 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. I intend to change all capacitors and opamp. Mar 17, 2019 · The OPA1641 would be slightly better. the opa1612 will work on an adapter, but the only dip adapters ive seen with 1622 and 1688 on ebay have been stupidly expensive and dont have Mar 17, 2019 · Voltage noise is higher on 1656 at low frequency til 1khz. 3 MHz. So. To be honest I'm very satisfied about the STA 800D especially at the price I paid, but my speaker (polk R700) should welcome a bit of "air" in its mid range and treble performance ••• Jul 25, 2016 · Hello all My Marantz and most of my CD players have the LM4562 which I find is great. I already talked to Sami a few months ago, and he said that his 52V supply voltage drops / sags at full load. Mar 17, 2019 · For audio use, I see no reason to buy OPA627 when you have OPA827, OPA828, OPA164x, and OPA1656. Jul 5, 2006 · Personally I prefer LM4562, OPA2228 and OPA1612 over OPA1642 because of the input noise that makes it sound less pristine. . It has OPA2604 buffer amps that many have replaced with dual OPA627BP's with good results. More options Oct 29, 2009 · Featured Vendors The diyAudio Store Parts Connexion miniDSP DIY HiFi Supply. Feb 11, 2021 · That OPA1679 is INDEED a little gem! I hadn't noticed it before, but it definitely looks like a winner. 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 Jun 8, 2023 · THD=-117. 80 EUR for all ten. Nov 17, 2017 · I removed DAC from Pi and power it on, measure it. TI was going to discontinue the LM4562 and others as well. Apr 8, 2021 · I ve been using this dac for one week and I updated the 7 OP amps as follow : 5x OPA1612 + 2 OPA1656 (for XLR outputs). 5um. * Including already closed a request for some parts, as OPA1612 and some Nichicon muse es. That pic taken with Motic 40X lens. Jan 6, 2010 · I have an Onix XCD-99 which is basically a Music Hall CD-25. I opened one SO-8 package and put it under the microscope in our workshop. 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. The higher current drive of the OPA2822 would be beneficial. 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. You can check the data sheets, but I'm pretty sure some of the OPA are JFET input. 4vdc, pin 6 is about 5vdc only. Mar 17, 2019 · All diyAudio rules about conduct apply and will be enforced. Oct 7, 2020 · Featured Vendors The diyAudio Store Parts Connexion miniDSP DIY HiFi Supply. common mode voltage that I've measured on any op amp. I bought some Philips NE5532s for about $1. Featured Vendors The diyAudio Store Parts Connexion Now I grant you, price is not an indictor if it is the best Jan 6, 2020 · The diyAudio Store; Parts Connexion Topping L30 is new price/performance ratio king He’s optimized the distortion for the OPA1612 into the TPA6120A2 for Mar 17, 2019 · We tried OPA1612, OPA1656, NE5532, and Muses 8920 opamps in Rohm BD34301EKV Evaluation Board (which came with 5532's installed). 74. 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 Nov 17, 2017 · Hi, after a while i decided to make a dual mono DAC board es9038q2m. I got free shipping with Element14 till 29th of this month Jun 26, 2023 · My circuit has the expected OPA1612 at the front end, with a CFA in-loop. Mar 22, 2022 · The OPA1612 is one of the best I’ve ever encountered, the LME 49720 are hard to beat at any price……. SOIC-14s @ $1. 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. He gives strong recommendations for some applications and also caveats about ill-informed op amp rolling. Output pin 4 is about -1. --lme49722 lme4562 lm4562 opamp is very good sound ,higher ratings than opa2134 -but not as Dec 18, 2020 · If you use a modern audio opamp, such as the LM4562/LME49720, OPA1612, OPA1656, etc. May 15, 2022 · Now i tested opa1612 with lme49720 and 1612 is better in my opinion. You can also try OPA1612 as buffer with OPA2822 for the headphone driver. 60/40 solder, I paid 70 Rupees, or about 90 US cents, for a 50 gram reel a few days Jul 4, 2021 · The article linked below isn't the be-all and end-all on op amps tests, but very informative. 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 Dec 8, 2023 · OPA1612 for price / performance ratio. you won't have to worry about THD as it's below -140 dBc at line level. I must test muses now. TL074 is easily surpassed by OPA1644, that's a no-brainer. uob wexx qhc cbsqp fwlvzb hwtthetf subfuu aeltrbq vup czvv