Opa1642 review. Feb 28, 2021 · The new breed of TI J-Fet opamps offer superior performance to that old soldier the OPA2134. The OPA827 for example has superior load drive,much lower distortion and miniscule DC offset. Audiophonics is proud to present its OPA range with the OPA1642 based on a authentic Texas Instruments chip. 000015% at 1 kHz. 00005%) a low input bias current of 2pa Oct 7, 2022 · Rolled in some different op amps. I have also tried opa1642, 1612 and 2134, but they are all slightly Apr 27, 2023 · don't worry, I know a little we are on the basis of 100 dollar dacs on this new entry-level akm and moreover in relation to the tests carried out at the vintage era "pre-serie", wiim had to debug in hardware this version quickly to release a new one version because of real problems in audio. This OPA offers excellent performance for audio applications. TI’s OPA1642 is a Dual SoundPlus™ high-performance, JFET-input audio op amp. Prefer the OpA2134 over these. This OPA1642 with JFET input achieves a low noise level of 5. When we swap the OPA1642 with an OPA1642 of a neighbouring channel (not showing any popcorn noise), the pocorn noise is remaining, on the same channel!! The neighbouring channel, now assembled with the former “Popcorning” OPA1642 doesn’t show any popcorn noise! It seems that in this case the popcorn noise depends on the channel. 5nV/√ Hz noise density with an ultralow distortion of 0. . Thanks in 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. Currently, I require opamps in the DIP package. Jan 15, 2020 · There are many reviews of audio hardware and expert members to help answer your questions. Mar 14, 2010 · Tubey, better late than never - I just replaced all NE5532 amps in Benchmark DAC1 with OPA1612 and play it so far for few hours. Similar Sound compared to OPA2134 but Bass is little better under control. Both fet based opamps sounds a little bit more solid in the bass (not quantity but the imaging and the texture). 1 MB · Views: 136 test_OPA1642 vs OPA2134. 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? M500 SINAD is higher than DO300 with less op-amps. 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. May 23, 2018 · The first time I did test with opa1642 opa2156 (precision opamp version of opa1656) opa1612. The OPA1611 (single) and OPA1612 (dual) bipolar-input operational amplifiers achieve very low 1. 1-nV/√ Hz noise density with an ultralow distortion of 0. Jan 5, 2019 · Other Parts Discussed in Thread: OPA1642, OPA1622. but Feb 11, 2023 · 好久没动烙铁了，试下opa1642 ,属于jfet型音频专用运放，又焊了八个opa1611单转双运放，试下声音有什么改变，焊接好opa1642煲机后，再拍视频上来。 不要让我发运放采购记录交易记录，我拿棒棒糖跟幼儿园小朋友换的好了吗。 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 Mar 22, 2022 · These are probably among the two highest of the best sounding dual opamps around today. Opa1642 sounds a bit smoother and silky at top end but a little bit fat in the mids. It has the most stable input capacitance vs. 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. 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 Jun 18, 2019 · Hello everyone, I have the DAC Emotiva XDA-1 preamp with the DAC Analog Devices AD1955 and Burr Brown OPA-2134 op-amps, I want to update to the Burson Audio Play with the DAC: ESS Technology SABRE32 / ESS9018 and NE5532 X 3, NE554 X 2 op-amps, would it be a good update to the Burson Audio? thank you very much to all. 1nV/√Hz @ 1 kHz, with distortion of only 0. It can easily replace LM4562, NE5532 or TLE2072 OPAs, for example. the opa1641 opa1642 and opa1644 rail-to-rail output swing allows increased headroom making these devices ideal for use in any audio circuit. 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. Jul 4, 2009 · Marketing 101 by having one of the engineers on the diy threads because it creates interest (especially from spec crazy diy-ers who “need” the lastest and best specs and use “word of mouth” via the audiophile threads to push cost up by popular demand) They do outsource them to official distributors ie Mouser, Digi-Key but you have to buy them in bulk (we’re talking 100s to 1000s) and The OPA1641-Q1 (single) and OPA1642-Q1 (dual) series are JFET-input, ultra-low distortion, low-noise operational amplifiers (op amps) fully specified for audio applications. Find parameters, ordering and quality information. who builds large PA speaker systems. Combined with its 600W switching-mode power supply, the result is an extremely quiet power amplifier with a signal-to-noise ratio that achieves numbers consistent with The OPA1641 (single), OPA1642 (dual), and OPA1644 (quad) series are JFET-input, ultralow distortion, low-noise operational amplifiers fully specified for audio applications. The OPA1641 (single), OPA1642 (dual), and OPA1644 (quad) series are JFET-input, ultralow distortion, low-noise operational amplifiers fully specified for audio applications. I've only used it in a MINT, but I liked it substantially better than the 2132 and almost as much as the AD8620. I last tried the circuit with OPA2134 in year 2000, and with TL074 in 1992. Pas complètement homogène cet AOP généralement très plébiscité pour ses caractéristiques techniques n'est pas optimal sur tous les systèmes. I have OPA1642 on my amplifier too so this is very much laidback sound. 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. 16; 3,214 In Stock; Mfr Find OPA1642 on Octopart: the fastest source for datasheets, pricing, specs and availability. Oct 11, 2022 · For the input buffer and preamplifier sections, a Texas Instruments OPA1642/1656 op-amp and OPA 1637 balanced drivers were employed, along with a “bootstrapped” input buffer. now it is proven that problems linked to power supply problems (observed by onlyoneme) . The dual and quad versions feature completely independent circuitry for lowest crosstalk and freedom from interactions between channels, even when overdriven or overloaded. May 15, 2022 · Buggle2 Riaa board. Edit: It is not always the best solution implementing the fastest OPAmp for I/V! Jul 5, 2006 · Would wish to decide on OPA2107 or OPA1642 which Andrea recommend strongly with indeed very compatible and improved parameters to the NJM353. 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 Texas Instruments Linear parts available at DigiKey. jpg The OPA1641 (single), OPA1642 (dual), and OPA1644 (quad) series are JFET-input, ultralow distortion, low-noise operational amplifiers fully specified for audio applications. Jan 10, 2016 · I talked yesterday to my buddy Greg B. common mode voltage that I've measured on any op amp. Oct 3, 2022 · Per OPA1642 datasheet: Added 100-Ω resistor in series with the output right before C14/C15 to limit in-rush current into coupling capacitors and prevent parasitic capacitance from cabling from causing instability. consists of 2 x 10 op-amps in parallel and the two 10s are balance connected. Jul 19, 2023 · The most ”spacious ” perceived sound with the biggest soundstage was with opa1642 - but the bass pitch wasnt as clear to follow in the music listening as it was with the lm4562. 1nv/vhz noise low thd+n (0. The OPA169x operational amplifiers achieve a new level of performance for low-power amplifiers with a low 4. May 9, 2023 · Hello together, i want to put one of the mentioned OP Amps in my amp. OPA1664 is in stock at Mouser as a BJT input opamp replacement. features include 5. The OPA1641, OPA1642, and OPA1644 rail-to-rail output swing allows increased headroom, making these devices ideal for use in any audio circuit. May 3, 2022 · I'd not use a JFET input opamp (OPA1642 is an example) to replace a BJT input opamp (NJM4580 is an example). It appears that the May 30, 2012 · I was told OPA1642 was the best suitable ic for replacing tl072, All This Thread Reviews Gear Database Gear for sale Latest Trending. X-fi Prelude' Mar 17, 2019 · The OPA1641 would be slightly better. Dec 6, 2018 · Just replace the original op-amp with one with a similar specification, if it's not possible to find an exact replacement. In particular, it has good dynamics and a low level of harmonic distortion. ••• • audio·phile: a person with love for, affinity towards or obsession with high-quality playback of sound and music. (NOTE: We once owned a recording studio together back in the late 1970's through the early 1980's. Jun 19, 2021 · The good calculated LPF can reveal the DAC sound potential because no digital glitch occurs on the analog output. I used to have a comparison written up between the 2132 and 2604, but I don't know where it is anymore. Mids and details are sharp, analytical. Jul 4, 2009 · I must stay on this OPA1642 for a while now because I cannot afford to buy a new soundcard now. 2-nV/√ Hz noise density and distortion of –127 dB at 1 kHz. Every amp. jpg. Regards, Richard ••• 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 Frequency (Hz) Voltage Noise Density (nV/ Hz) 1 10 100 10 100 1k 10k 100k 1M 10M C020 + + ± ± Treble Bass +15-15 1/2 OPA1656 1/2 OPA1656 Input Output Pad Product Oct 11, 2001 · I really like the 2604. TSC Feb 29, 2008 · Well, I'm looking at opamp options for my X-fi Prelude since ther front opamp is easily upgradeable and I've read up about these and have come to the following conclusions: *The AD8620AR is near the same as the AD8620BR and less expensive. @JonSnell Electronic - perhaps you used Octopart to see Mouser's stock. Old op-amps such as the LF412 and TL072 are more than good enough for 99% of audio applications. Oct 10, 2020 · There are many reviews of audio hardware and expert members to help answer your questions. Which of the two mentioned OP Amps (OPA1612 or OPA1656) is the better one, in a scientific point of view. 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 the opa1641 (single) opa1642 (dual) and opa1644 (quad) series are jfet-input ultralow distortion low-noise operational amplifiers fully specified for audio applications. Mar 20, 2018 · Tested the OPA1642 for the I/V of D10. Two identical gain 11 amplifiers were tested. 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. r/audiophile is a subreddit for the pursuit of quality audio reproduction of all forms, budgets, and sizes of speakers. Other Parts Discussed in Thread: OPA1612, OPA1642, RC4136 I use these amplifiers for pro audio. The rail-to-rail output swing allows increased headroom, making these devices ideal for use in any audio circuit. I also refurbish large format recording consoles. 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. . 00005% @ 1 kHz. Feb 11, 2021 · I have a fully parametric EQ design that I would like to build using OPA1642 op amps, because even with about 6 of them cascaded, I expect their noise and distortion to still be inaudible. NE5532 is a very good amplifier especially for the price ($0. TI’s OPA1662 is a Dual SoundPlus™ low noise (3. The OPA1641-Q1 (single) and OPA1642-Q1 (dual) series are JFET-input, ultra-low distortion, low-noise operational amplifiers (op amps) fully specified for audio applications. Feb 11, 2021 · Below is a comparison between OPA1656 and OPA1642. Tested a lot of OP, including LME49720, OPA1612, OPA1642, MUSES8920 and MUSES8820. It doesn't have that airiness that AD op amps have. This OPA1642 OPA is mounted on a DIP8 socket, enabling it to be easily connected to a circuit accepting this format. 3nV/rtHz) and distortion (-124dB), wide bandwidth (22MHz) audio op amp. The Forums. The OPA1602 and OPA1604 bipolar-input operational amplifiers achieve very low 2. 1. 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. The LPF is not only made by the combination of the resistors and capacitor network, but the op-amp become the major factor to the sound improvement. I had AD8620 before and I think this OPA1642 has a narrower soundstage. 6 days ago · OPA1642AID Texas Instruments Audio Amplifiers Sound-Plus Hi-Perf JFET-Inp Aud Op Amp datasheet, inventory, & pricing. I've read about the 'Sondigo vs. The OPA1602 and OPA1604 series of op amps offer rail-to-rail output swing to within 600mV with 2kΩ load, which increases headroom and maximizes dynamic range. We would like to show you a description here but the site won’t allow us. ) He talked to me about OPA1611's versus OPA134's as well as the OPA1612's versus OPA2134's. 2 X OPA1642. 00003% at 1kHz. Listening only after ”hifi jargongs” like soundstage depth and width, then the opa1642 was the winner. I don't care about listening tests or something else, just want to use the technical better one in my amp. Bon équilibre des registres sans atténuation du grave contrairement à un LME49720; très bonne définition mais aigu trop franc, pouvant facilement tendre à l'agressivité. Just did an A/B with 2 opamp buffers on my Hypex NC500 monoblocks, which I normally use with no buffer, as the dac has enough gain to drive the NC500 modules direct. MUSES8820 is the best, IMHO. OPA1641-Q1, OPA1642-Q1 SBOS791A –JUNE 2017–REVISED NOVEMBER 2017 OPA164x-Q1 SoundPlus™ JFET-Input, Automotive-Grade, Audio Operational Amplifiers 1 1 Features OPA1642: Reel, Cut Tape, MouseReel: Audio Amplifiers Sound-Plus Hi-Perf JFET-Inp Aud OpAmps +1 image OPA1642AIDGKR; Texas Instruments; 1: $2. Looking forward to your sharing. 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. Aug 8, 2024 · OPA1642AQDGKRQ1 Texas Instruments Audio Amplifiers Dual automotive soundplus™ high-performance, JFET-input audio op amps 8-VSSOP -40 to 125 datasheet, inventory, & pricing. Home. 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. 5). Measurewise there's not really a difference comparing OPA2134. Aug 19, 2024 · This means natively you have up to 24-bit, 384 kHz PCM and DSD256 decoding, The K11 R2R also uses a GigaDevice GD32F303 32-bit ARM-Cortex M4 SoC, a Savitech SA9312L USB audio bridge, two Texas Instruments OPA1642 low-pass filter op-amps, and finally two sets of SGMICRO SGM8262-2 op-amps for audio amplification. qfxxj ntbraqq idkyvncs ddqme nbywhdr nmh ssrwd orwsyw nsib yoey