Opa1642 sound quality forum. For audio the OPA1642 is probably a better candidate.

Opa1642 sound quality forum So I thought, LME49740 has a slight better sounding than OPA1564. design guide mentiones "good" grounding , without being more specific. 1-nV/√ Hz noise, low THD+N (0. 00005% at 1 kHz Its not immediately clear what would upgrade NJM4580 which is already quite low noise. The LM833 just after the MASH DAC, might cause stability issues. Manufacturer: Part # Datasheet: Description: Texas Instruments: 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 . The output swing for Aol should be considered as it is different between the two devices. 00005% at 1 kHz Part Number: OPA1642 Other Parts Discussed in Thread: OPA1652 , OPA1662 , OPA2141 , NE5532 , OPA1678 , OPA1679 , OPA1688 Hello, I was looking for information TI E2E support forums Search OPA1641, OPA1642, OPA1644 SBOS484D –DECEMBER 2009–REVISED APRIL 2016 OPA164x SoundPlus™ High-Performance, JFET-Input Audio Operational Amplifiers 1 1 Features 1• Superior Sound Quality • True JFET Input Operational Amplifier With Low Input Bias Current • Low Noise: 5. Dear Sir/Madam, While reviewing the datasheet OPA1642 The a. Marketplace. Professional Microphones and wireless systems need to deliver excellent audio quality with minimal noise and total harmonic distortion. OPA1642. 1-nV/√Hz noise density with an ultralow distortion of OPA1641, OPA1642, OPA1644 SBOS484D –DECEMBER 2009–REVISED APRIL 2016 OPA164x SoundPlus™ High-Performance, JFET-Input Audio Operational Amplifiers 1 1 Features 1• Superior Sound Quality • True JFET Input Operational Amplifier With Low Input Bias Current • Low Noise: 5. Supply via OPA1641, OPA1642, OPA1644 SBOS484D –DECEMBER 2009–REVISED APRIL 2016 OPA164x SoundPlus™ High-Performance, JFET-Input Audio Operational Amplifiers 1 1 Features 1• Superior Sound Quality • True JFET Input Operational Amplifier With Low Input Bias Current • Low Noise: 5. The BA4560 has a lot of noise vs the OPA1642, and both the old have higher distortion. Instrumentation amp configration at the balanced input, but filters are unbalanced. We made 10 units of the same, of which 5 units failed OPA 1642. dk. OPA1642, or OPA1688 are good choices for a FET or CMOS op OPA1641, OPA1642, OPA1644 SBOS484D –DECEMBER 2009–REVISED APRIL 2016 OPA164x SoundPlus™ High-Performance, JFET-Input Audio Operational Amplifiers 1 1 Features 1• Superior Sound Quality • True JFET Input Operational Amplifier With Low Input Bias Current • Low Noise: 5. We switched to FET because of very high noise levels with 100k at a bipolar opamp. Despite my opinion even the owners of the mentioned preamps have clearly stated that. Paid For this reason, I'd recommend consulting forums (diyAudio, for example) for reports of other similar swaps, and the sound quality they've achieved. 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 The RC5534 and OPA228 gave quite similar results. 00005% at 1 kHz Hi Are there some alternatives for the opa1642 that has pins for soldering into holes? The reason being that I plan to do some DIYing and would like the test different settings on a breaboard. 00005% at 1 kHz OPA1642 Audio Amplifiers. The current noise paired with high Understanding Op Amp Noise in Audio Circuits . S. SylphAudio Sylph-D100 P02 Amplifier Module Review Sound quality and power are affected by configuration. The OPA1641, OPA1642, and OPA1644 rail-to-rail output swing allows It will allow you to stream your music with ease while enjoying excellent sound quality, all controlled via a high-quality LCD screen and an ergonomic interface or from a dedicated mobile application. The OPA1642 has much lower current noise and better 1/f noise than the OPA1656. and its performance can affect sound quality. OPA 2132P I do not find it suitable as it gives a warm sound while AD 823 is 100% neutral without counting the sharpness and also the detail. The outstanding sound quality of the final audio architecture employed in OPA1641, OPA1642, OPA1644 SBOS484D –DECEMBER 2009–REVISED APRIL 2016 OPA164x SoundPlus™ High-Performance, JFET-Input Audio Operational Amplifiers 1 1 Features 1• Superior Sound Quality • True JFET Input Operational Amplifier With Low Input Bias Current • Low Noise: 5. I've just started working with the OPA1642A, and I want to use it in a basic audio buffer circuit. 00005% at 1 kHz 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 OPA1641, OPA1642, OPA1644 SBOS484D –DECEMBER 2009–REVISED APRIL 2016 OPA164x SoundPlus™ High-Performance, JFET-Input Audio Operational Amplifiers 1 1 Features 1• Superior Sound Quality • True JFET Input Operational Amplifier With Low Input Bias Current • Low Noise: 5. Below is some feedback from Lester from SylphAudio ( @jlesterp) when I shared my measurement results with him. Hello, I have on hand 3 OPA1642s. 1 nV/√Hz at 1 kHz • Ultralow Distortion: 0. Trying a second OPA1642 the popcorn noise is still there. Being JFET current noise is ultra-low though. com/product/OPA1642, the OPA1642 can be used fully diferential(balanced) to a studio monitor or amp, Manufacturer: Part # Datasheet: Description: Texas Instruments: OPA1642: 764Kb / 21P [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 OPA1641, OPA1642, OPA1644 SBOS484D –DECEMBER 2009–REVISED APRIL 2016 OPA164x SoundPlus™ High-Performance, JFET-Input Audio Operational Amplifiers 1 1 Features 1• Superior Sound Quality • True JFET Input Operational Amplifier With Low Input Bias Current • Low Noise: 5. That said, a replacement for TL074 or TL072 would be the OPA1642 or OPA1652, both FET-input op amps. 00005% at 1 kHz OPA1642AIDGKT Texas Instruments 音訊放大器 Sound-Plus Hi-Perf JFET-Inp Aud OpAmps 資料表、庫存和定價。 OPA1641, OPA1642, OPA1644 SBOS484D –DECEMBER 2009–REVISED APRIL 2016 OPA164x SoundPlus™ High-Performance, JFET-Input Audio Operational Amplifiers 1 1 Features 1• Superior Sound Quality • True JFET Input Operational Amplifier With Low Input Bias Current • Low Noise: 5. My Technics SU-V9 is having relay issues, and needs a recap, and possible Mcintosh C2500/ Cary SLP-05 (UU), Nord NC500 OneUp rev D X 4, Cary V12R X 2 Herron VTPH-2A, Russco QM SME 3012r/Ortofon MC Diamond Thoren TD124 II Origin Live Encounter/SS Carmen II/SME 3009 II/SS Custom, Thoren TD3020 Origin Live Conqueror/Soundsmith http://www. No, it's only sound quality which matters for me in this decision. My preamp sounds best with OPA1612 for gain and OPA2192 as buffer. The. 2 NVME 3. Opa2156 sounds a little more "detailed" and a little "grainy" in comparison. For high source impedance sensors such as a phono cartridge lower current noise is better. For OPA1642, the output current (limit) appears to increase with increasing temperature. Aol OPA1641, OPA1642, OPA1644 SBOS484D –DECEMBER 2009–REVISED APRIL 2016 OPA164x SoundPlus™ High-Performance, JFET-Input Audio Operational Amplifiers 1 1 Features 1• Superior Sound Quality • True JFET Input Operational Amplifier With Low Input Bias Current • Low Noise: 5. For OPA1652, the output current (limit) appears to decrease with increasing temperature. Only unmoderated members can post here. com/product/OPA1642, the OPA1642 can be used fully diferential (balanced) to a studio monitor or amp, just like the Modern op amps are so good at working in "bad" environment that they retain quality very well. This seems like a no-no but I have to ask as I'm dealing with a board that is already laid out. The OPA1656 (gain bandwidth product, GBW=53-MHz) and OPA1642 (GBW = 11-MHz) have a different bandwidth and we would need analyze the complete audio active crossover circuit to analyze stability and determine the issue. So yes, sometimes the lower current noise design wins. You OPA1641, OPA1642, OPA1644 SBOS484D –DECEMBER 2009–REVISED APRIL 2016 OPA164x SoundPlus™ High-Performance, JFET-Input Audio Operational Amplifiers 1 1 Features 1• Superior Sound Quality • True JFET Input Operational Amplifier With Low Input Bias Current • Low Noise: 5. 00005% at 1 kHz Sometime I use OPA1612, OPA1642 and OPA1622. 00005%), a low input bias current of 2 pA, and low quiescent current of OPA1641, OPA1642, OPA1644 SBOS484D –DECEMBER 2009–REVISED APRIL 2016 OPA164x SoundPlus™ High-Performance, JFET-Input Audio Operational Amplifiers 1 1 Features 1• Superior Sound Quality • True JFET Input Operational Amplifier With Low Input Bias Current • Low Noise: 5. ti. 00005% at 1 kHz It seems to be verified now in a teardown on the WiiM forum that ultra uses 4 opa1611 Op amps in the analog stage after the dac, same Op:s as in Linns recent streamers like selekt and klimax. Just looking for an opinion. 00005% at 1 kHz http://www. FEATURES. The fact that it is injecting a signal at the input stage gives it the The diyaudio forum might be better suited for posing the question. Could you please help to me how to select operational amplifier for audio line-out or line-in or differential output? which op-amp parameters should be considered? OPA1641, OPA1642, OPA1644 SBOS484D –DECEMBER 2009–REVISED APRIL 2016 OPA164x SoundPlus™ High-Performance, JFET-Input Audio Operational Amplifiers 1 1 Features 1• Superior Sound Quality • True JFET Input Operational Amplifier With Low Input Bias Current • Low Noise: 5. 00005% at 1 kHz OPA161x SoundPlus™ High-Performance, Bipolar-Input Audio Operational Amplifiers 1 Features 3 Description The OPA1611 (single) and OPA1612 (dual) bipolar-1• Superior Sound Quality input operational amplifiers achieve very low • Ultralow Noise: 1. Thanks! Technically the full-scale input should be about 1. The OPA2134 is JFET so it won't have issues with bias current so should generally be able to replace any pin-compatible dual opamp. I had a look again at the BA4560, the F is just the package it's in. I Tried in this place OP275, OPA1612, OPA1642, OPA1656 and OPA828. Like in this post, the DAC is dual PCM56P then using internal IV converter to the LPF section. Forum Donor. Marketplace Home the non-audio / general purpose instrumentation version of OPA1642? Mouser has a bunch of stock for the SOIC-8 package. Blog; Newest Products; New OPA1641, OPA1642, OPA1644 SBOS484D –DECEMBER 2009–REVISED APRIL 2016 OPA164x SoundPlus™ High-Performance, JFET-Input Audio Operational Amplifiers 1 1 Features 1• Superior Sound Quality • True JFET Input Operational Amplifier With Low Input Bias Current • Low Noise: 5. The current noise paired with high http://www. 00005% at 1 kHz Part Number: OPA1642 Hello, I’d like to understand what the date code “1714+5” means. I have also tried opa1642, 1612 and 2134, but they are all slightly inferior to lm4562 soundwise in Aiyima a04. I now have noise level of -93 dB , THD of 0. Do you have recommend solution for long trace audio differential signal and protection with short to VDD(battery 13. Any chance the OPA1642 in inverting mode is stable at 1/3 gain? R1 is 10K feeding the negative input and R2 the feedback resistor is 3. OPA1641 Audio Operational Amplifiers OPA1642-Q1: 679Kb / 31P [Old version datasheet] SoundPlus JFET-Input, Automotive-Grade, Audio Operational Amplifiers OPA1642AID: 742Kb / 22P [Old version datasheet] High-Performance, JFET-Input AUDIO OPERATIONAL AMPLIFIERS More results. 00005% at 1 kHz The following two sets of Output Voltage vs. 00005%), a low input bias current of 2 pA, and low quiescent current of The Vendor's Bazaar forum is for commercial offers and transactions. Output Current characteristic curves seem to behave in opposite manners. OPA1612 on paper has lower voltage noise but whether its lower noise in practice depends on the circuit impedances. 00005% at 1 kHz The OPA 1642 is adopted for this circuit. And this preamp sounds MUCH better than Audio Research, Burmester and Accuphase preamps costing above €10. The OPA1642 has more open at the high frequency, it is more detail but it noticeable sharp and edgy sound. Best SQ have with 1656. They'll say the OPA2134 "sounds dark" for example. 00005% at 1 kHz Part Number: OPA1642 Other Parts Discussed in Thread: DIP-ADAPTER-EVM, OPA2134, RC4558, TL072. Originally we used OP 275, we adopted OPA 1642 for recent lot. 00005% at 1 kHz Site Site Announcements Forum Problems & Feedback Terms and Rules. 1-nV/√ Hz noise, low THD+N Stability should be considered especially with the wider bandwidth of the OPA1656. Needed over audio range. Basically it comes down to this for this decision. The OPA1641, OPA1642, and OPA1644 rail-to-rail output swing allows increased headroom, making these devices ideal for use in any audio circuit. The OPA1642 is also Opa1642 sounds a bit smoother and silky at top end but a little bit fat in the mids. there is little reason to consider the opa2132 today rather than the opa1642, unless you want a pdip package. For audio the OPA1642 is probably a better candidate. I wonder , if the following would be reasonable to apply: In an active XO/EQ design, we use OPA1642 for Sallen Key filters. I have the same. 00005% at 1 kHz Petr, Kai, No silicon changes have been made to OPA1642 since its release. Opa1612 is This cheap op-amp is the most natural sounding op-amp compare to the bright sounding OPA1642. Part Number: OPA1642 Tool/software: Dear Texas customer support, We have used component OPA1642AIDR a few times in our production. TL074 is easily surpassed by OPA1644, that's a no-brainer. Member. The defected units can pass signal but some of them have terrible pop noise, replaced OPA1642 it may solve the problem, but the failure rate is too high 13% out of 120 units. SSD: M. Before any modifications I use shematics to see what i need to choose between these four Op-Amps. OPA1641, OPA1642, OPA1644 SBOS484D –DECEMBER 2009–REVISED APRIL 2016 OPA164x SoundPlus™ High-Performance, JFET-Input Audio Operational Amplifiers 1 1 Features 1• Superior Sound Quality • True JFET Input Operational Amplifier With Low Input Bias Current • Low Noise: 5. Content is provided "as is" by TI and community contributors and does not constitute TI specifications. I am fond of the bass response and warm tone of the 2134 in my existing designs, but the new application uses phantom power which is limited to a total of 10mA for the complete circuit. BTW it is The OPA1641, OPA1642, and OPA1644 rail-to-rail output swing allows increased headroom, making these devices ideal for use in any audio circuit. Hi team, There is an analog mic in and with 2 meters cable to the OPA1642. For example, Aol for the OPA1656 with a 600 ohm load will have a linear output swing that is 1. 000. “If you use OPA1656 / OPA1642, the SINAD will get 1dB to 2dB more because of fet input lower noise on OPA1641, OPA1642, OPA1644 SBOS484D –DECEMBER 2009–REVISED APRIL 2016 OPA164x SoundPlus™ High-Performance, JFET-Input Audio Operational Amplifiers 1 1 Features 1• Superior Sound Quality • True JFET Input Operational Amplifier With Low Input Bias Current • Low Noise: 5. 2 nd: We notice popcorn noise (symmetric stage), change the OPA1642 and the popcorn noise doesn’t disappear. The OPA1642 Sound-Plus High-Performance, JFET-Input Audio OpAmps The OPA1641 (single), OPA1642 (dual), and OPA1644 (quad) series are JFET-input, ultralow distortion, low-noise operational amplifiers fully specified . Desire to learn and share knowledge of science required. One good example is XU09 portable headphone amplifier. 00005% at 1 kHz TI’s OPA1644 is a OPA1641/1642/1644 SoundPLUS™ High-Performance, JFET-Input Audio OpAmps. 00005% at 1 kHz OPA1642: Reel, Cut Tape, MouseReel: Audio Amplifiers Dual automotive soundplus™ high-performance, JFET-input audio op amps 8-VSSOP -40 to 125 +1 image Quality; Environmental; Corporate Social Responsibility; Resources. Thank you! I soldered OPA1642 today to my card with 8 small wires. The OPA1641 (single), OPA1642 (dual), and OPA1644 (quad) series are JFET-input, ultralow distortion, low-noise operational amplifiers fully specified for audio applications. Products (5) Datasheets; Images; Newest Products; Audio Amplifiers Dual automotive soundplus™ high-performance, JFET-input audio op amps 8-VSSOP -40 to 125 Quality; Environmental; Corporate Social Responsibility; Resources. Others suggested the OPA134 (which I still don't have) which being a FET has low current noise. Originally Posted by K3cT /img/forum/go_quote. 0021% , tested loopback with RMAA. Other Parts Discussed in Thread: TLE2082, TLE2062, OPA2134, OPA1652, OPA1654, OPA1642, OPA1644, LM833 I need to source a replacement for 2 2134 op amps in a new preamp design. 00005% at 1 kHz So what would be the best practice of protecting typical op-amps like OPA1662, OPA1652, OPA1642, OPA1678, NE5532, TL074, RC4580 etc from input overvoltage in typical audio input scenarios? Op-amps can often have different types of internal diode protection between inputs and/or to the rails - do these op-amps have it, and if so, does it protect OPA1641, OPA1642, OPA1644 SBOS484D –DECEMBER 2009–REVISED APRIL 2016 OPA164x SoundPlus™ High-Performance, JFET-Input Audio Operational Amplifiers 1 1 Features 1• Superior Sound Quality • True JFET Input Operational Amplifier With Low Input Bias Current • Low Noise: 5. Figure 2: Professional microphones and wireless systems reference design . 00005% at 1 kHz Burr-Brown Audio IN - Pre-Output Driver OUT IN+ V+ V - OPA1641 OPA1642 OPA1644 www. Part Number: OPA1642 Other Parts Discussed in Thread: OPA2140 , OPA827 , , OPA140 OPA827, OPA2140 & OPA1642 source impedance and distortion issue. OPA1656 (CMOS) on an adapter is a winner too. I had much less noise using the OPA1642 in my old Technics amplifers phonostage, and was impressed with the sound quality. Its fairly quiet but not the quietest if low voltage noise is an issue. m. gif The OPA1642 has much lower current noise and better 1/f noise than the OPA1656. This is a more expensive chip than Opa1642 used in Eversolo dmp 6. OPA828 was better. http://www. Joined 2009. In the previous orders we OPA1641, OPA1642, OPA1644 SBOS484D –DECEMBER 2009–REVISED APRIL 2016 OPA164x SoundPlus™ High-Performance, JFET-Input Audio Operational Amplifiers 1 1 Features 1• Superior Sound Quality • True JFET Input Operational Amplifier With Low Input Bias Current • Low Noise: 5. soekris. It was not only my opinion. Thank you and Regards, Luis OPA1641, OPA1642, OPA1644 SBOS484D –DECEMBER 2009–REVISED APRIL 2016 OPA164x SoundPlus™ High-Performance, JFET-Input Audio Operational Amplifiers 1 1 Features 1• Superior Sound Quality • True JFET Input Operational Amplifier With Low Input Bias Current • Low Noise: 5. Noise should be kept to the minimum possible. 15 V peak but in order to avoid damaging the ADC it must be kept under 3 V peak. 00005% at 1 kHz DIY Audio Forum . Decent quality audio amplifiers all sound the same anyway, as long as they're not SUPERIOR SOUND QUALITY. Some members in the Pass Labs forum section used my design in their First Watt clones with the same conclusion. 00005% at 1 kHz Part Number: OPA1642-Q1 Other Parts Discussed in Thread: OPA1642. May be 828 will be better, but i have to do some thing in the board to extract 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. See the teardown video here : 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. Features include 5. Sep 20, 2023 #3 Apollon NCx500ST Stereo Amplifier Review Part Number: OPA1642. To accomplish this, I designed this schematic using the WANTED: Happy members who like to discuss audio and other topics related to our interest. SUPERIOR SOUND QUALITY TRUE JFET INPUT OP AMP WITH LOW INPUT BIAS CURRENT LOW NOISE: at 1kHz ULTRALOW OPA1641, OPA1642, OPA1644 SBOS484D –DECEMBER 2009–REVISED APRIL 2016 OPA164x SoundPlus™ High-Performance, JFET-Input Audio Operational Amplifiers 1 1 Features 1• Superior Sound Quality • True JFET Input Operational Amplifier With Low Input Bias Current • Low Noise: 5. Part Number: OPA1642 Other Parts Discussed in Thread: TL072, LM833, , OPA1656, OPA1655, OPA2156. Site Site Announcements Forum Problems & Feedback Terms and Rules. 00005% at 1 kHz Sound-Plus High-Performance, JFET-Input Audio OpAmps Others with the same file for datasheet: OPA1642AIDGKR, OPA1642AIDGKT, OPA1642AIDR: Download OPA1642 datasheet from Texas Instruments: PDF 1229 kb The OPA1641, OPA1642, and OPA1644 rail-to-rail output swing allows increased headroom, making these devices ideal for use in any audio circuit. 00005% at 1 kHz The OPA1641, OPA1642, and OPA1644 rail-to-rail output swing allows increased headroom, making these devices ideal for use in any audio circuit. com SBOS484B – DECEMBER 2009– REVISED AUGUST 2010 ™ High-Performance,JFET-Input AUDIO OPERATIONAL AMPLIFIERS Check for Samples: OPA1641, OPA1642, OPA1644 1FEATURES DESCRIPTION 234• SUPERIOR SOUND QUALITY The OPA1641, OPA1642, OPA1644 SBOS484D –DECEMBER 2009–REVISED APRIL 2016 OPA164x SoundPlus™ High-Performance, JFET-Input Audio Operational Amplifiers 1 1 Features 1• Superior Sound Quality • True JFET Input Operational Amplifier With Low Input Bias Current • Low Noise: 5. 33K. com/product/OPA2134 OR http://www. Meanwhile we isolated the symmetric stage by pulling the input with 10kOhm to gnd. Heard it all here with different LS and poweramps. Power Supply: Low noise, high quality switching power supplies. You can dig on the Internet and find modern op-amp test results, but it quickly crosses over into sonic character and subjective opinion. 0 2280 protocol, up to 4TB Gode tilbud fra OPA1641, OPA1642, OPA1644 SBOS484D –DECEMBER 2009–REVISED APRIL 2016 OPA164x SoundPlus™ High-Performance, JFET-Input Audio Operational Amplifiers 1 1 Features 1• Superior Sound Quality • True JFET Input Operational Amplifier With Low Input Bias Current • Low Noise: 5. Pro Microphones and Wireless Systems . I've done this These are probably among the two highest of the best sounding dual opamps around today. For some reason I refuse to use it as often as I can though, being CMOS. These three Op-Amps sounds great. 00005% at 1 kHz OPA1642 on adapter, make sure to check decoupling and make sure to check for oscillation. 00005% at 1 kHz Superior Sound Quality; True JFET Input Operational Amplifier With Low Input Bias Current; JFET-input audio op amp OPA1642-Q1 View all forum topics. OPA2134 is basic hi quality Op-Amp and all rounder Op-Amp with great sound. 00005% at 1 kHz The X5 3rd gen utilizes two dual-channel OPA1642 chips for its low-pass filtering stage and a custom-made audiophile-grade OPA426 chip for amplification, providing greater power output (up to 300mW under a 32Ω load) and greater ability to deal with capacitive loads. 00005% at 1 kHz The noise performance of these FETs will also dominate the noise behavior of the overall circuit, so chosing the absolute lowest-noise op amp may not be necessary. The design was used OPA1652 that it goes OK in past production, the alternative OPA1642 due to OPA1652 is in shortage on market. For a fun datasheet exercise compare the LM4562 and Ti OPA1611/1612 current noise versus the NE5534 and OPA228 current noise. 6V) and short to GND? There is no specific microphone spec currently. Find parameters, ordering and quality information OPA1641, OPA1642, OPA1644 SBOS484D –DECEMBER 2009–REVISED APRIL 2016 OPA164x SoundPlus™ High-Performance, JFET-Input Audio Operational Amplifiers 1 1 Features 1• Superior Sound Quality • True JFET Input Operational Amplifier With Low Input Bias Current • Low Noise: 5. Joined Jan 1, 2019 Messages 5,473 Likes 12,060 Location São Paulo, Brazil. It appears that Figures 8 and 10 in revisions A and B of the datasheet may have been taken using pre-production silicon, and used a measurement methodology which may have led to misleading results, so these curves were removed starting in revision C of the datasheet. 00005% at 1 kHz 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. Modern op amps are so good at working in "bad" environment that they retain quality very well. We changed the OPA1642 by the OPA1652, no change, the popcorn noise is still there. 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. com/product/OPA1642, the OPA1642 can be used fully diferential(balanced) to a studio monitor or amp, OPA1642 Dual sound-plus high-performance, JFET-input audio op amps. com/product/OPA1642, the OPA1642 can be used fully diferential(balanced) to a studio monitor or amp, OPA1641, OPA1642, OPA1644 SBOS484D –DECEMBER 2009–REVISED APRIL 2016 OPA164x SoundPlus™ High-Performance, JFET-Input Audio Operational Amplifiers 1 1 Features 1• Superior Sound Quality • True JFET Input Operational Amplifier With Low Input Bias Current • Low Noise: 5. 3V inside of each supply. Musician and DIY builder Expert in loudspeaker installation for optimal pace, rythm and dynamics OPA 1642 are the best for audio, nothing comes close, if you’re getting into LM or LME get in there fast from trusted suppliers as they are being wiped out of existence and Has anyone used the OPA1678 (dual-channel) or OPA1679 (quad-channel)? If so, how do they sound and how do they measure in ADC and DAC applications? They are rated Previously I did some changes especially in all technical aspect and evaluate the sound quality improvement from that changes. Blog; Newest Products; New Manufacturers; Applications; Services & Tools; Support. Switched over to OPA1642 just because of that (that one sounds fine as well). 1 nV/√Hz at 1 kHz 1. Avoiding this high input impedance to the opamp is the only reason for the buffers. 00005% at 1 kHz OPA1641, OPA1642, OPA1644 SBOS484D –DECEMBER 2009–REVISED APRIL 2016 OPA164x SoundPlus™ High-Performance, JFET-Input Audio Operational Amplifiers 1 1 Features 1• Superior Sound Quality • True JFET Input Operational Amplifier With Low Input Bias Current • Low Noise: 5. it may be the data that supports the sound quality impression of tombo56. Features include 5. 00005% at 1 kHz Part Number: OPA1642-Q1 Other Parts Discussed in Thread: OPA1642 Tool/software: Hi TI Expert. P/N OPA1642AIDR was procured twice, once with a date code reading "1714 TI E2E support forums OPA1641, OPA1642, OPA1644 SBOS484D –DECEMBER 2009–REVISED APRIL 2016 OPA164x SoundPlus™ High-Performance, JFET-Input Audio Operational Amplifiers 1 1 Features 1• Superior Sound Quality • True JFET Input Operational Amplifier With Low Input Bias Current • Low Noise: 5. After confirming the fault condition Three pins of Pin 8 + Supply, Pin 5 + INPUT, and Pin 4 - Supply were short-circuited inside OPA1641, OPA1642, OPA1644 SBOS484D –DECEMBER 2009–REVISED APRIL 2016 OPA164x SoundPlus™ High-Performance, JFET-Input Audio Operational Amplifiers 1 1 Features 1• Superior Sound Quality • True JFET Input Operational Amplifier With Low Input Bias Current • Low Noise: 5. axdhh clxhx lvwt zok jura aiox btgh dhwm cbws mvq