- Opa1612 vs opa1642 reddit. 1) base on the circuit in OPA1642's datasheet. OPA2134 is basic hi quality Op-Amp and all rounder Op-Amp with great sound. The OPA1641, OPA1642, and OPA1644 rail-to-rail output swing allows increased headroom, making these devices ideal for use in any audio circuit. 000015% at 1kHz. The OPA1652 and OPA1654 op amps offer rail-to-rail output swing to within 800 mV with a 2-kΩ load, which increases headroom and maximizes dynamic range. 1-nV/√ Hz noise density with an ultralow distortion of 0. e. The OPA1611 (single) and OPA1612 (dual) bipolar-input operational amplifiers achieve very low 1. 18 Dec 6, 2018 · This question is triggered by a repair I recently did where the originals, while still available, were stupid expensive. When I do serious listening test between them, just an A - B testing, not back and forth, I found the OPA1642 creates more noise at upper frequency because of those high frequency details. May 9, 2023 · Hello together, i want to put one of the mentioned OP Amps in my amp. TL074 is easily surpassed by OPA1644, that's a no-brainer. Jul 4, 2009 · Here’s a great article comparing opa2156 CMO vs opa1612. Jul 25, 2016 · MASH covers a few different number of bits in the output - the DAC output could just be switches if 802 is LM833, its bjt input isn't suited to the circuit filter/feedback impedances - really should be a jfet type OPA1642 looks good on paper, better when you read the chatter from TI engineer on the project I would worry that there simply isn't Jun 19, 2021 · The OPA1642 has more open at the high frequency, it is more detail but it noticeable sharp and edgy sound. Before any modifications I use shematics to see what i need to choose between these four Op-Amps. Datasheet: 764Kb/21P. It's best use as an alternative to opa1612 when noise is not a big concern. 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. OPA1656 (CMOS) on an adapter is a winner too. The OPA1612 offers rail-to-rail output swing to within 600 mV with a 2 kΩ load, which increases headroom and maximizes dynamic range. 2-nV/√ Hz noise density and distortion of –127 dB at 1 kHz. For the case of OPA2134 is probably a good choice in general. It occurred to me that a more modern & higher performing part must exist at a lower price - a win-win scenario if ever there was one. 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. It is a little bit cleaner and perhaps because of that instruments are more defined in space. Two identical gain 11 amplifiers were tested. com Mar 7, 2019 · Sometime I use OPA1612, OPA1642 and OPA1622. JFET inputs let you work with a larger range of input resistors. If a FET-input amplifier is required for low bias current (such as for a phono preamp), you might consider the OPA1642 or OPA1678. the differences aren't huge, but big enough to make a change worthwhile. Depending on the actual application circuit, there are alternatives with better noise performance. 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! Part Number: OPA1656 Other Parts Discussed in Thread: OPA2134, OPA2604 The OPA1656 is the industry’s lowest voltage noise high voltage CMOS on the market. --lme49722 lme4562 lm4562 opamp is very good sound ,higher ratings than opa2134 -but not as Mar 17, 2019 · Rolling opa1642, opa1612, muses8920, 2xopa627bp, lme49720na, opa2134. Transients are stronger, both rimshots of snare drum and big-band trumpets. Last edited: 2020-10-05 9:04 pm More options Dec 9, 2019 · Home: RME ADI-2 Pro FS R BE—Neumann KH80 DSP, Arendal Sound 1723 1S Work from Home: JDS Labs Atom—Etymotic ER4SR, AKG K371, Sennheiser HD820 Measurement: Earthworks M30 (Reed R8090)—Earthworks ZDT 1021 — RME ADI-2 Pro FS R BE — REW OP Amp Rolling: the Philips CD753 (aka Marantz CD5000) with MUSES8820 vs OPA1692 vs LME49723 and Others - an article by Paul Hunting on TNT-Audio, Internet HiFi magazine, www. 大家好。我使用OPA1642+OPA1622搭建了一个简单耳放电路，OPA1642接电流输出型dac作IV转换，OPA1622作差分运放接耳机负载。我发现音频段内所有频率都会有很大的失真，不知道问题出在哪里，还请工程师帮忙看一下。 OPA1642 IV电路. 1-nV/√Hz as well as an extremely low distortion level of 0. 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 OPA1642 Datasheet. It might require more capacitance in the LPF of the I/V stage to keep it happy Vs the others. It ensures a very low noise density of 1. 魅族mx4pro运放芯片用的是1612，而xplay 3s用2604，不知道魅族能不能比vivo更屌呢？ 貌似老外们觉得2604比较好有助攻的么 OPA1612 与 OPA2604 对比？ Jul 30, 2021 · If I could also request test of: OPA1642 ~ 2 Euro OPA1656 ~ 2. The TI OPA1612 dual operational amplifier benefits from excellent technical characteristics, allowing very good electrical and audio performance. . Any futher recommendations? my favs 1642/1656, 1612, lme49720na 2xopa627bp, ••• Feb 17, 2023 · The OPA1622 is a slow device compared to the OPA1612/OPA1656. For some reason I refuse to use it as often as I can though, being CMOS. LME49720 sound is boringand too light. Part Number: OPA1642 Other Parts Discussed in Thread: OPA1612, , OPA1652, OPA1688, OPA1662, OPA1602. but the difference between opa2604 and LME49720 is much smaller than the difference between these two compared to the original ne5532. ah so much other untested opa's 1678 still on my list ina1620. 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 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. Last edited: 2023-06-06 6:15 am Mar 17, 2019 · We tried OPA1612, OPA1656, NE5532, and Muses 8920 opamps in Rohm BD34301EKV Evaluation Board (which came with 5532's installed). Feb 11, 2021 · I agree about the OPA1612 for gain. Also the OPA1612 does have the highest quiescent over the other opamps we're talking about it will be the hottest. ti. 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. Every amp. Dear TI E2E support, Hi there, Our team made a prototype of a phono-stage amplifier (pic. The OPA169x operational amplifiers achieve a new level of performance for low-power amplifiers with a low 4. The OPA1642 is also theoretically the best choice for the unity and x2 stages in the output buffer, although the LME49720 is a very close second. ••• Mar 22, 2023 · OPA1612到了后，自己先试了试OPA1612+JRC5532，感觉和OPA1642+JRC5532没什么区别，我试了好些碟，也试不出来什么区别；三频几乎没有差别，打分还是一样的，90分水平； OPA1612+OPA1612，这个组合的高频给我非常好的感受，比OPA1642+JRC5532明显更细腻一点，高频的线条感更好 The OPA1611 (single) and OPA1612 (dual) bipolar-input operational amplifiers achieve very low 1. Jun 5, 2023 · The OPA1642 is significantly inferior to the OPA1612 in many regards (GPW product, output drive, distortion vs output load, input voltage noise for example). This op amps offer rail-to-rail output swing to within 200 mV of the power supplies with a 2-kΩ load, which increases headroom and maximizes dynamic ran TI’s LME49860 is a 2-channel, 44-V, high-fidelity, high-performance audio op amp. However, there really will be very little difference between it and other high performance opamps. Mar 17, 2019 · 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. Aug 3, 2019 · The OPA1642 is the best choice that you can make other than incredibly expensive ones that provide very, very, slightly less noise and higher distortion. Find parameters, ordering and quality information The OPA1641 (single), OPA1642 (dual), and OPA1644 (quad) series are JFET-input, ultralow distortion, low-noise operational amplifiers fully specified for audio applications. It appears that the OPA1611/2 have a lower noise voltage, wider bandwidth and higher slew rate than the OPA134 and OPA2134's. Mar 17, 2019 · The OPA1641 would be slightly better. The NJM4560DX does not appear to be FET type, though I thought a FET type like OPA1642 would suit this circuit? or maybe OPA1612 which isnt FET like the • audio·phile: a person with love for, affinity towards or obsession with high-quality playback of sound and music. 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. Feb 11, 2021 · Below is a comparison between OPA1656 and OPA1642. The OPA1652 (dual) and OPA1654 (quad) FET-input operational amplifiers achieve a low 4. May 3, 2022 · Its not immediately clear what would upgrade NJM4580 which is already quite low noise. Feb 22, 2016 · “比如30多年前的opa2604、2134，到后来的opa627，以及近几年的opa1612，都是口碑非常好的产品。 ”德州仪器高精度运算放大器产品线市场工程师周颖表示，“去年中国市场上很多主打Hi-Fi的智能手机、智能平板、播放器、智能耳放都采用了OPA1612方案。 OPA1611, OPA1612 www. OPA1612 on paper has lower voltage noise but whether its lower noise in practice depends on the circuit impedances. TI’s OPA1662 is a Dual SoundPlus™ low noise (3. 1 nV/√Hz noise density with an ultra-low distortion of 0. Jun 5, 2023 · Although specifications of OPA1612 (bipolar) indicate they are superior to that of OPA1642 (JFET inputs) in practice OPA1642 performs slightly better. 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. Thanks in I'm with Jim here. Description: High-Performance, JFET-Input AUDIO OPERATIONAL AMPLIFIERS. The OPA1641 (single), OPA1642 (dual), and OPA1644 (quad) series are JFET-input, ultralow distortion, low-noise operational amplifiers fully specified for audio applications. Pin can be left floating or connected to any voltage between (V–) and (V+). TI-Produkt OPA1642 ist ein(e) Zweifacher Audio-Operationsverstärker, SoundPlus™, hohe Leistung, JFET-Eingang. One good example is XU09 portable headphone amplifier. 3nV/rtHz) and distortion (-124dB), wide bandwidth (22MHz) audio op amp. Mar 14, 2010 · OPA1612 is fuller sounding - especially lower midrange but also more dynamic. My understand if noise isn’t a problem the opa1656 is great alternative to the opa1612. the ne5532 looks a bit harder, narrower and more direct, the other two a bit more relaxed and Aug 24, 2012 · i tryed lme49722 opa2134 and opa1612 ,--. I don't care about listening tests or something else, just want to use the technical better one in my amp. It outperforms most other opamps, very low noise & distortion, doesn't color the sound whatsoever. common mode voltage that I've measured on any op amp. 为增加其声音的胆味和醇厚绵密的味道，输出端还特别增加了一枚ti新构架的场效应jfet音频专用的发烧运放opa1642，该运放的信噪比极高，毫无底噪！一点都没有！非常的好！喜欢夜里听的人必须的！ We would like to show you a description here but the site won’t allow us. Jul 4, 2021 · OPA1642 on adapter, make sure to check decoupling and make sure to check for oscillation. IMHO the outcome was mostly decided by how the opamps responded to the RF coming out of the dac chip. Strange but found too many times to ignore it. Parameter-, Bestell- und Qualitätsinformationen finden. May 23, 2018 · The first time I did test with opa1642 opa2156 (precision opamp version of opa1656) opa1612. Sound is more "color", and "massive". There's no shortage of candidates here, and the new OPA1656 is a great option, but you could also check out: OPA1642, OPA1678, OPA827, and the newer OPA828, or also OPA2810. ••• 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 We would like to show you a description here but the site won’t allow us. ••• I've been using mostly LM4562, except when I need a JFET opamp (high impedance inputs for example). 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. Manufacturer: Texas Instruments. Nov 19, 2014 · opa1612 与 . The OPA1642 has the JFET input stage- thus reducing the input current noise- reduced common mode input distortion and sensitivity to source impedances, and lower standing current going for Oct 15, 2014 · Texas Instruments' OPA1612 (dual) bipolar-input operational amplifier achieves very low 1. Opa1656 has good phase response at high frequency. 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. Find parameters, ordering and quality information Apr 25, 2024 · Part Number: OPA1642 Other Parts Discussed in Thread: TLE2426, , OPA1656, JFE150, JFE2140, OPA1612, LME49720, OPA891. The amplifier is powered by 2 x 9V batteries for low noise operation. 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. Composite amplifier is one of the best application with opa1656. It offers exceptional performance in almost any audio application. Without scoping the outputs or measuring the DAC there's no telling if Jan 5, 2019 · Other Parts Discussed in Thread: OPA1642, OPA1622. It has the most stable input capacitance vs. These three Op-Amps sounds great. TL072 is not in the same league, I replaced those decades ago already for better performing types. Opa1642 sounds a bit smoother and silky at top end but a little bit fat in the mids. 5-nV/√ Hz noise density with an ultra-low distortion of 0. r/audiophile is a subreddit for the pursuit of quality audio reproduction of all forms, budgets, and sizes of speakers. . Hello, I am looking at replacing the old JRC opamp in my phonostage of my amplifier. Which of the two mentioned OP Amps (OPA1612 or OPA1656) is the better one, in a scientific point of view. The OPA1641, OPA1642, and OPA1644 series of operational amplifiers are unity-gain stable and provide excellent dynamic behavior over a wide range of load conditions. TSC The OPA1611 (single) and OPA1612 (dual) bipolar-input operational amplifiers achieve very low 1. Part #: OPA1642. The dual and quad versions feature completely independent circuitry for lowest crosstalk and freedom from interactions between channels, even when overdriven or overloaded. My favorites at the moment opa1642 and this one opa1656. Mar 17, 2019 · CMRR is not a big issue. But I really like the FET's in that position. 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 OPA1642: 742Kb / 22P [Old version datasheet] High-Performance, JFET-Input AUDIO OPERATIONAL AMPLIFIERS OPA1642: 865Kb / 25P [Old version datasheet] High-Perforamnce,JFET-Input AUDIO OPERATIONAL AMPLIFIERS OPA1642: 679Kb / 31P [Old version datasheet] SoundPlus JFET-Input, Automotive-Grade, Audio Operational Amplifiers OPA1642-Q1: 679Kb / 31P 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 Nov 26, 2017 · thanks for your tips! i have tested the opa2604 and the LME49720 compared to the ne5532. May 15, 2022 · Now i tested opa1612 with lme49720 and 1612 is better in my opinion. Dec 28, 2017 · There are some things to watch out for when swapping op amps. consists of 2 x 10 op-amps in parallel and the two 10s are balance connected. These sound great and outshine many of the other modern high performance audio opamps out there today. tnt-audio. 000015% at 1 kHz. OPA1656 sounded worst, Muses 8920 sounded best. For being itself, opa1642/opa2140 is pretty good. I would tend to use the OPA1642 for buffering, filtering and EQ. Jan 10, 2016 · He talked to me about OPA1611's versus OPA134's as well as the OPA1612's versus OPA2134's. 00005% at 1 kHz. Both fet based opamps sounds a little bit more solid in the bass (not quantity but the imaging and the texture). I must test muses now. I too find that the OPA1612 and OPA1642 are fantastic upgrade/replacements in a whole lot of professional and consumer audio gear out there equipped with comparatively outdated opamps. dfijyq ehgt tqti pgvr rlmf adddta qerg cctl tleq kykkemp