Opa1612 vs opa1656 forum

Opa1612 vs opa1656 forum. One difference between the 1612 vs 1656 is the 1656 has higher output current availability. I was able to test the following BURSON op-amps: SS V5, V5i, SS V6 Classic, SS V6 Vivid. . My understand if noise isn’t a problem the opa1656 is great alternative to the opa1612. OPA2156 does not, it is closer to a single pole response. Jan 6, 2010 · Member. 9 nV/Hz and a current noise density of 6 fA/Hz, enabling extremely low noise performance in a wide range of circuits. I have not tested the OPA1612 with high value bias resistors to see if it has the latch-up/bias current correction start-up issues of the LME49720. 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. OPA1602はOPA1612より1mA少ない OPA1602はUnity Gainでの安定度が高い。 OPA1612はOPA1602よりも安定度が悪いのでゲイン1以上で使ったほうがよさそう。 容量性負荷の場合，OPA1612はCfが必要。OPA1602にOPA1612と同じCfを取り付けると容量負荷でもオーバーシュートが出ない。 Apr 5, 2021 · The original amp has the OPA1656 and the other has the OPA1642. 1 is now ready with OPA1656 in DIP8 socket. Aol for the OPA2134 with a 600 ohm load has an output swing that is 2. #2. 输入P3或P4一旦接信号发生器（即使无输入信号），OPA1612输出（PreAmp01或PreAmp02）都有15MHz左右，2V多的正弦信号。. 611. Various functions. but the difference between opa2604 and LME49720 is much smaller than the difference between these two compared to the original ne5532. Never heard a Weiss. The FET-input architecture achieves a low 2. 1편을 보고 오시는 게 이해가 편합니다. This was interesting as both the March Audio and the Buckeye Purifi amps were being built with the OPA1612. Generally a FET input has a higher 1/f noise corner than a BJT input. Mar 17, 2019 · OPA1656 also has a pole-zero pair in the open loop gain curve to boost the open loop gain at audio frequencies (hence the 53 MHz gain bandwidth product). Jan 7, 2021 · The different players sounded different. 1x V6 Vivid, 2x OPA1692, 2x OPA209: This config sounds best of all. May 23, 2018 · May 28, 2018. OPA2156: HiFi in CMOS. Output signal is amplified 90db. Now they seems to have changed again to opa1612 in many places - maybe a suggestion to try ? I have tried ne5532, opa2604, lm4562 and opa1612 and I prefered LM 4562 in both Aiyima a07 and the tpa3251-based Aiyima a04. The OPA1655 and OPA1656 (OPA165x) are Burr-Brown™ op amps designed specifically for audio and industrial applications, where maintaining signal fidelity is crucial. In many case, a super high performance audio opamp (say OPA1612) is followed by a high-current amplifier (say OPA564). 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. ti. The OPA1656 immediately raised my attention, plus there was/is a long thread about it on diyaudio. Two cases were evalutated – in a Mar 17, 2019 · OPA1656 rolling I tried in all cases to bypass the rails with a 0. DK799를 산 지 꽤 오래 됐습니다. The OPA1611 (single) and OPA1612 (dual) bipolar-input operational amplifiers achieve very low 1. 5 V to 36 V. 5V to 36V) on 3. So THD measurement value of -25. 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. 9‑nV/√ Hz voltage noise density and 6‑fA/√ Hz current noise density, allowing for very-low noise performance in a wide variety Nov 30, 2021 · The output swing for Aol should be considered as it is different between the two devices. TI has characterized the THD vs Rs for a lot of its recent devices, but alas not the OPA1656 (at least that I could find). 如果是自激的话输入直接接地也会有输出的，你可以先输入接地，输出是否有 OPA1611, OPA1612 www. 9mA of supply current. May 21, 2020 · 결과보고가 아니라 중간보고 2로 찾아왔습니다. the best sounding is OPA1612 ,not for driving headphones -low output current drive ,3ma current consumption. 2K unbalanced and 4. #47. I used though the better TIs in output stages of middle class DACs as these benefitted from a more round /warm presentation with less details, as that masked their weaknesses and in fact The OPA1611 (single) and OPA1612 (dual) bipolar-input operational amplifiers achieve very low. 2010-06-10 8:32 am. - SLEW RATE: 24 V/uS. Setup calibrated in dbV. 000015% at 1 kHz. Total Noise of OPA1656 vs OPA1612. PRODUCTION DATA. The FET-input architecture achieves a low voltage noise density of 2. Sep 25, 2019 · The OPA165x operates over a very wide supply range of ±2. #701. The OPA1611 and OPA1612 offer rail-to-rail output swing to within 600 mV with a. 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 The OPA1611 (single) and OPA1612 (dual) bipolar-input operational amplifiers achieve very low. Mar 17, 2019 · 2022-07-15 7:58 pm. Other Parts Discussed in Thread: LM4562, , INA1620, OPA1622, OPA1656, OPA828, OPA1642, OPA1678, OPA1612, BUF634A. You don't have to use SA, distortion level obvious on oscilloscope screen. Jun 8, 2023 · OPA828. Thanks for that recommendation. Tried putting in opa1612 today. Jul 3, 2019 · Opa1612 and LM4562/LME49720 are both good. Mar 17, 2019 · We tried OPA1612, OPA1656, NE5532, and Muses 8920 opamps in Rohm BD34301EKV Evaluation Board (which came with 5532's installed). DK799 OPAMP를 바꿔보았다 - 중간보고. Sep 6, 2023 · I was using opa1656 with fosi v3 ever since I got the uni. 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! Jan 28, 2018 · I had the chance to gather up a selection of opamps from my parts bin, including BB OPA2604, OPA637, AD823, LME49860, JR4556, Muses8820 and 8920, and compare them against each other along with a Burson V6 Classic (thanks to them for sending me an evaluation). So between the two, the OPA1644 is the better choice. IMHO the outcome was mostly decided by how the opamps responded to the RF coming out of the dac chip. 2020-10-02 10:56 pm. 25V to ±18V or (4. With a FET input op amp input current noise is lower, but the input voltage noise is higher. The OPA1642, however, is also LESS expensive ($2. May 19, 2017 · Joined 2006. Separation and imaging is bad, layering is bad. Using OPA1612 that are more tolerant of RF is a good start. If a FET-input amplifier is required for low bias current (such as for a phono preamp), you might consider the OPA1642 or OPA1678. 3V inside of each supply. engie490 said: I noticed in Purifi's specs that the input impedance is 2. 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. 9‑nV/√ Hz voltage noise density and 6‑fA/√ Hz current noise density, allowing for very-low noise performance in a wide variety 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 Jan 2, 2021 · OPA1656 / OPA1612 / Burson V5i / OPA627 / Genuine NE5532 / Genuine Muse 02 / 0PA1622 / OPA1642 / OPA1602 The question of Op amps has already been debated on DIY audio, and I had used the OPA1656 and I think the opinions are unanimous, these Op amps are very good and seem to work the best with those amps. Especially the last one seems promising but first I need better test equipment to analyze such small distortion levels. Joined 2011. Part #. 1 nV/√Hz noise density with an ultra-low distortion of 0. dotneck335 said: An OPA1612 has slightly better specs than an LM4562---less noise and distortion, faster, and more output voltage swing. 1. try modding with better FET input opamp, like OPA2107 or OPA2111. You retrieve so much details and trebble extension but could be a bit fatiguing. Part Number: OPA1612 Diverse Parts Discussed in Thread: OPA1656 I'm up to, to designer a 3rd or 4th order 20 Hz high spend filter equal ultrasound low distortion. 4K balanced. 4 nV/rthz. Jul 4, 2009 · Here’s a great article comparing opa2156 CMO vs opa1612. ) He talked to me about OPA1611's versus OPA134's as well as the OPA1612's versus OPA2134's. 9 mA per channel. This is a rarely needed parameter as I guess but some of the measurement tasks require that kind of symmetry, and I just bought 1K pcs of RT6863S to use that in the Cosmos Hi Brian, OPA2134 is probably a good choice in general. It's more recently become fashionable in the audio industry to use a composite design in power amplifiers, especially headphone amplifiers. 1-nV/√Hz noise density with an ultralow distortion of 0. The OPA1656 is the industry’s lowest voltage noise high voltage CMOS on the market. 2-kΩ load, which increases headroom and maximizes dynamic range. by site admin February 07, 2019. i tryed lme49722 opa2134 and opa1612 , --. From the data sheet, in comparison to the OPA1642, I see that the OPA1656 has slightly less voltage noise but also slightly more current noise; slightly faster and less THD, but worse CMRR. Shameless plug I just highlighted the OPA1656 in my latest application note. Hello, I am considering the OPA1612 as a headphone driver replacement for JRC2114. 相手となるデフォのLME49720は輪郭がはっきりして線が太めで、耳 Nov 28, 2022 · OPA1656: OPA1656. TOPPING DX7 Pro のオペアンプを交換し、組み合わせを試し、理想の音質へ近づけました。. Jonah Strauss. Not exactly universally compatible with all preamps. However I like the slew rate of OPA2156 , any pointers on what to improve THD+N ? I am thinking of a composite amplifier so the load and feedback will be driven by the second opamp. Part Number: OPA1612. Recently I reviewed the Nord Three SE 1ET400A Dual Mono Stereo Amplifier. 3nV/rtHz) and distortion (-124dB), wide bandwidth (22MHz) audio op amp. OPA1656 Dual D (SOIC, (8) (1) For all available packages, see the package option addendum at the end of the data sheet. And of course, the price on the OPA1656 is lower. It can be replaced but you'll get diferent sound character. 이번에는 OPA1612, AD8620을 들어보고, 원래 끼워져있던 MUSES8820과 비교를 해보게 됐습니다. OPA2604 is FET input opamp. Amazing value and no more urge to upgrade. TI’s LME49860 is a 2-channel, 44-V, high-fidelity, high-performance audio op amp. I used 10 or 12 in my preamp rolling project - never a problem with Jan 10, 2016 · Jan 10, 2016. This feature accommodates the power supply constraints of many types of audio products. If you want discrete, then Sonic Imagery 994 or the Weiss op amps. Apr 13, 2024 · Discrete OpAmp Review: Sonic Imagery vs Sparkos. are pretty bad. Now, we run through a hand calculation to find the total noise of a simplified audio system. Depending on the actual application circuit, there are alternatives with better noise performance. Dec 11, 2019 · São Paulo, Brazil. TI’s OPA1662 is a Dual SoundPlus™ low noise (3. A fully satisfying set of immediate results Today I followed Marcel’s advice to try a combo of double the R and half of the C – looking for a limit or edge. Intellectual 555 points. Transparency got way better. I would not worry about the number of op-amps. At this time I'm using OPA1602 but want to experiment with something else like OPA1652 or OPA1656. 25 V to ±18 V or 4. Set 1 produces no visual deviation at all. He discusses the Sallen and Key High Pass filter in this book and also the distortion. 22dBc=548%. 1-nV/√ Hz noise density with an ultralow distortion of 0. The OPA1612 does not seem to have the process contamination of the LM497X0 that produces rocky-sounding noise. As per datasheet Fig 7, OPA1656 achieves this pretty well with loads of 2k (or more) @ output voltage 3V(rms) OPA1612 achieves this flatness of THD+N curve , eg in inverting mode G=-1 (Fig. the differences aren't huge, but big enough to make a change worthwhile. Other Parts Discussed in Thread: OPA192, , OPA551, OPA547, OPA593. Part Number: OPA2210. In Objective2 gain-stage I prefer the SS V5, with the hybrid V5i or with SS V6 there's a hiss noise when moving the volume knob and also the thump noise when switching the gain is higher. Jan 4, 2022 · In a recent Bruno Putzeys video interview he shared a preference for the OPA1656 with the Purifi amp. In my case the OPA828 has been a clear upgrade to the OPA627 but the OPA1656 is an upgrade to the OPA828. (NOTE: We once owned a recording studio together back in the late 1970's through the early 1980's. I used 4 Burson V6 Vivid in my Burson headphone amp but I have replaced them all with OPA1656. 08 @ Mouser). Since the input signal is -34dB and the harmonics are +66dB, the distortion factor is 100dB emphasized and measured. For this example, we are using the OPA1656 in a non-inverting configuration with a gain of 40 dB or 100V/V. But the technicalities of sound like attack and decay, background/noise floor, etc. the ne5532 looks a bit harder, narrower and more direct, the other two a bit more relaxed and Mar 17, 2019 · 2019-04-21 2:49 pm. Disregard offset issue with +-3V power, see abnormality with +-6V. Is this necessary when using the 1612 as a headphone driver? Oct 11, 2021 · The OPA1656 is an operational amplifier (op-amp) designed for audio and industrial applications where signal integrity is critical. Other Parts Discussed in Thread: OPA1612, OPA828. The idea of this group buy is to propose a full pack @fair price for a brand new Purifi Buffer : SPEC : - THD: 0,00026% @ Vin 2,5 V RMS. That unit came with the Sonic Imagery's 990ENH discrete operational amplifier ("opamp") in the buffer stage (pre-amplifier). OPA627 is really bass forward but you lose details, clarity and energy. + + Mar 17, 2019 · The OPA1641 would be slightly better. 2017-06-04 7:42 pm. Rail-to-rail output. 1F X7R on the backside with the shortest possible lead length. Does anybody TI E2E support forums Aug 24, 2012 · Member. Regarding the tone stack, if there is enough gain in the front-end, the input-referred noise may not be impacted by the resistances. The data sheet is very handy for audio designers working with 600Ω loads, but also presents . It's a killer OpAmp, and better suited to non-inverting buffer duties than the OPA1612/2211 Mar 17, 2019 · The OPA1641 would be slightly better. In terms of noise performance in the real world the OPA1612 beats the LME49720. These combinations should be equal to a single op-amp noise and 4 paralleled op-amps noise. DC voltage (as shown on the front page). OPA1612 is bipolar input opamp. pdf (sorry, pasting the address makes a huge link) you use a ~50 ohm isolation resistor. Dynamics felt better, bass felt more defined and the upper midrange seems to have more air. 2013-06-30 1:38 pm. The sparkos opamps are very good as well but are IMO sonically warmer than the Sonic Imagery. 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. Jul 4, 2009 · The OPA1655 is the single channel version of the OPA1656. (or the 2156) The opamp has good phase margin and seems quite tolerant of sub-optimal layout. Quiescent current: 3. I talked yesterday to my buddy Greg B. Blue line - Input 1Vp-p, yellow - output. Nov 30, 2020. Click here to check the latest version. 求解决办法和分析原因。. #29. The OPA827 for example has superior load drive,much lower distortion and miniscule DC offset. The advanced process technology here has flat capacitance vs. With OPA827 and OPA627, the second harmonic (40kHz) was larger than the fundamental wave of 20kHz, and 40kHz was regarded as the fundamental wave, so THD could Feb 28, 2021 · The new breed of TI J-Fet opamps offer superior performance to that old soldier the OPA2134. Same good behavior also from an OPA1612. Apr 25, 2024 · Part Number: OPA1642 Other Parts Discussed in Thread: TLE2426 , , OPA1656 , JFE150 , JFE2140 , OPA1612 Dear TI E2E support, Hi there, Our team made a prototype lpf :opa1656 -----一開聲 音場唔大 深度就ok 中低明顯多 模擬感大於opa1612/22 個聲 延伸高至超高 來得小小刺激 低音多人聲結像 來得唔係好貼耳 套野仔係用來聽口水歌個d 未必滿意 聽 左成隻massive attack <<blue lines>> 真好夾 bass先決 又想分析opa1656幾好 Jun 29, 2021 · THS4631, OPA1656, LME49990, LME49722. In note slyt630. Mar 17, 2019 · 2019-07-04 11:22 pm. 41 Kbytes. Level of transparency and detail retrieval are better compared to stock OPA1612 and few others I tried from LME/AD/OPA series. Mar 17, 2019 · Here is a copy paste of the result for OPA1656 OPA1656 In the past I have to say I prefered widely the AD precise sound vs the softer traditional TI sound. HAL9000 said: If this is a real D10 schematic - the OPA1612AID opamps would be more suitable for both I / V and differential summing positions. The OPA1656 has very good THD + N. Download. Gain bandwidth product: 53 MHz. For example, Aol for the OPA1656 with a 600 ohm load will have a linear output swing that is 1. Mar 1, 2016 · 電子部品,通販,販売,半導体,ic,led,マイコン,電子工作opa1622dip化モジュール秋月電子通商 電子部品通信販売 Jan 6, 2020 · Finally I decided to nest already very good TPA6120A2 inside feedback loop of another operational amplifier. It offers exceptional performance in almost any audio application. Dec 30, 2023 · I don't have the books you mentioned but I do have a book called Small Signal Audio Design by Douglas Self. The OPA2156 is a new, high-performance op-amp from TI. This device also has a high output drive Nov 7, 2016 · OPA1612 1. File Size. Oct 15, 2014 · Texas Instruments' OPA1612 (dual) bipolar-input operational amplifier achieves very low 1. If a bipolar-input amplifier can be used, then you might Voltage Noise Contribution (OPA1612) Figure 3-4. OPA1656 Download. The specs on the opamp are really good, almost as good as the OPA1612 (and better in some ways that Slew rate: 24 V/µs. Mar 17, 2019 · If the impedance is high (10k ohm or higher), then a FET input op amp may be better. Two schematics in parallel and eight in parallel for both 1656 and 1642 were measured. The Texas Instruments OPA1656 has a specified temperature range from –40°C to +125°C and is offered in an 8-pin SOIC package. MUSES01は前記事にも書きましたが、最初に聴いたときは美音が衝撃的でした。. Apr 8, 2021 · I tried OPA1622, OPA627 and OPA1612 at I/V stage and OPA1612 is clearly the best to my ears. OPA1612 ก็เสียงดีนะ ซื้อมาลองเเล้ว ถือว่าเป็น OP-AMP รุ่นใหม่ที่ถูกพัฒนามาเเทนเบอร์ดังๆ ในอดีต พวกเเอมป์ราคาเเพงๆ นิยมใช้ OPA1612 VS MUSE02 We would like to show you a description here but the site won’t allow us. Oct 2, 2020 · Member. Basically, tonality is all you get with this config. #6. ---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. OPA1656 has about 6 dB more open loop gain at audio frequencies, so distortion is potentially lower. Pardon if any of the following has been covered. 如下图. Markw4 said: We tried OPA1612, OPA1656, NE5532, and Muses 8920 opamps in Rohm BD34301EKV Evaluation Board (which came with 5532's installed). GFI Synesthesia (and why the Zoom might just be better) r/BudgetAudiophile • Amp decisions have me confused - vintage, class d, integrated, oh my… please help! Mar 20, 2018 · Aug 18, 2019. Find parameters, ordering and quality information. 7 of OPA1612 datasheet) May 23, 2016 · Re: Q: (better) alternative for OPA627 ? The Analog Devices ADA4627 is essentially a second source version of the OPA627. OPA2210: Audio applications. Jul 4, 2009 · V5i brought about a drastic change by controlling the bass better, making the hit/slam quicker, less bloomy, opening up the mids and extending the highs which the XD05 badly needs. Prodigy 230 points. The owner then ordered a set of Sparkos Pro SS2590 discrete opamps. May 23, 2018 · Opa1656 and opa1612 without tweaking have better performance than almost any discrete solution. + + Feb 14, 2023 · Other Parts Discussed in Thread: OPA1612, , BUF634A, OPA1656, BUF634, THS6012, TPA6120A2. #1,608. R. 0:00 OPA1656(EQ) OPA2211( voltage follower)1:56 OPA2211 OPA1656オペアンプ回路のノイズ特性として、信号源の抵抗が大きい場合は、FET入力タイプが推奨されると Jan 6, 2019 · I have to say that this opamp has a very well input stage symmetry which is better than opa1612, opa2156, opa1656, ADA4898, and many-many other opamps 3-4x more expensive. 2V inside the negative rail and 2. OPA1656 OPA1656 Dual D (SOIC, (8) (1) For all available packages, see the package option addendum at the end of the data sheet. 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. OPA1656. The effective input noise depends on both the input current noise & input voltage noise. One other device that would be worth looking into is the OPA1656 - it is only a dual but has lower wideband noise. You will probably get lower distortion and will adversely affect dac sound quality. Some work was also done to reduce common-mode distortion in the OPA1656 when the impedances at the inputs are mismatched. Mar 24, 2021 · New Purifi Buffer in V2. It would be interesting to know what the input impedances are for the Sparkos and Sonic Imagery opamps. Farzaneh Faridi. 5V inside of the positive rail . #3. 4 Calculating Voltage Noise at the Output. People have a tendency to overestimate their hearing capabilities. 感谢您考虑为您的设计使用我们的音频放大器。 我没有你提到的书,但我有一本书叫小信号音频设计道格拉斯自我。 他在这本书中讨论了 Sallen 和 Key 高通滤波器、以及失真。 OPA1656具有很好的 THD + N。无底插头我刚刚在最新的应用手册中突出显示了 OPA1656。 The Zoom MS70-CDR vs. I like the low noise aspect of it, though it's pretty expensive. Wide supply range: ±2. 22dBc means -125. I want to drive a non-inverting OPA1656 from the wiper of a volume pot -- which means a range of source resistance for the OPA1656 from 0 to <del>Rpot/2<del> Rpot/4. 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. £4. I felt a great improvement overall. The low voltage noise combined with the low current noise make this device great for low and high impedance applications such as a high gain microphone pre-amplifier. Opa1656 vs sparkos. Part Number: OPA1656. It has the most stable input capacitance vs. Close to zero DC mv at its output would enable removal of the dreaded electrolytic coupling caps which will definitely lower colouration and improve sound quality. OPA1656 sounded worst, Muses 8920 sounded best. OPA2156 is also laser trimmed for lower input offset voltage. who builds large PA speaker systems. - GAIN: 14 dB. - BANDWIDTH: 2 Hz - 150 kHz. I want to make a Howland current pump at the first stage and then Oct 8, 2021 · 2x LT1115/AD797/OPA1611 or OPA1612 bipolar opamps for MC- extremely high S/N ratio for low output moving coil cartridges. Dec 11, 2019 · Normally you'd regularily search in the manufacturers new product listings first for any new interesting products. Mar 17, 2019 · The schematic, spectrum and results are given below. The OPA1612 offers rail-to-rail output swing to within 600 mV with a 2 kΩ load, which increases headroom and maximizes dynamic range. I ended up not linking that at all. Dec 14, 2015 · Technical support for the OPA1622 is available in the TI E2E™ Community Precision Amplifiers forum, where engineers can search for solutions, get help, share knowledge and solve problems with Nov 26, 2017 · thanks for your tips! i have tested the opa2604 and the LME49720 compared to the ne5532. Jul 4, 2009 · This config gives the most natural tonality. 2x OPA1641 or similar or OPA1656/OPA1642 FET input opamps for MM- also providing extremely high S/N with high cartridge resistance/inductance. Joined 2009. So it isn't really a "Pro" unit after all. Normally, that's not newsworthy because higher performing parts are coming out all the time. We are also using OPA1656 Datasheet (PDF) - Texas Instruments. Apr 16, 2023 · Apr 16, 2023. . OPA1656 1/2 OPA1656 Input Output Pad Product Folder Order Now Technical Documents Tools & Software Support & Community An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications, intellectual property matters and other important disclaimers. It appears that the OPA1611/2 have a lower noise voltage May 10, 2022 · In short, OPA1656 shows very high THD level when voltage below +-9 Volts. Soundstage and placement felt more solid. Mar 17, 2019 · Hi John I am also looking at IV conversion with output at 1Vrms From the datasheet of OPA1656 or OPA2156, it seems that at 1Vrms THD+N , OPA1656 performs better . Joined 2015. It is how they are used (gain, DC servo, other functions, components around it) that determines noise and distortion. But this time it's a bit more interesting. 64 GBP / €7,06 one off from RS. Sep 14, 2021 · That config caused the OPA1656 to become docile and passed all three muting switch tests. Dual customzied solution will give unmeasurable distortion (possibly -180db). If you have questions about quality, packaging or ordering TI products, see TI support. Pin can be left floating or connected to any voltage between (V–) and (V+). com with a TI insider involved. #1. 1倍同相放大，是否自激？. From what I know the OPA1656 is currently the highest-spec audio grade standard opamp that TI offers. 그 동안 수많은 With that being said, there will not be a huge noise performance difference between OPA1656 (~4nV/rthz) vs OPA1678 (~5nV/rthz) when the thermal noise is already 11. Dear all, aiming to keep THD+N figures constant over the audio frequency range. Other Parts Discussed in Thread: OPA1622, OPA1688. I'm waiting for OPA1656 and ADA4896 to try at I/V stage. 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. common mode voltage that I've measured on any op amp. The OPA1642 is “one step down” but still very highly rated, and it is JFET-input which should give a low enough DC-offset to be used directly in this kind of application. #49. Jul 22, 2022 · 2022-07-23 6:34 pm. I had no oscillations or instability with the OPA1656. At this point noise and ultra low noise supplies might be the last area I should put more effort into for this interface. Dear members: For a measuring circuit I need an operational with output current of 100mA and differencial supply voltage of 15V. Staging and imaging are phenomenal. qh st nh bd kh zp jk mb ld jj