Opa1612 vs opa1642 reddit forum. ti. They require a SOIC-8 to DIP-8 adapter though. PA Op Amp If I could also request test of: OPA1642 ~ 2 Euro OPA1656 ~ 2. Mentions; Tags; More; Cancel; Ask a related question. We changed the OPA1642 by the OPA1652, no change, the popcorn noise is still there. TL074 is easily surpassed by OPA1644, 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 He talked to me about OPA1611's versus OPA134's as well as the OPA1612's versus OPA2134's. USB DAC Hi Ervin, Yes those devices are very popular, unfortunately I don't have any way to know for sure when they are back in stock. It's a killer OpAmp, and better suited to non-inverting buffer duties than the OPA1612/2211 Low- and Mid-Frequency Test Signals for Evaluation of Room Modes // Measurements: ESS Hump revisited // Humpify -- apply "ESS Part Number: OPA1612 Hi, Somebody has already asked THD+N vs Supply Voltage of OPA1612, but the datasheet seems to wrong. 25 V to ±18 V. 25 V to ±18 V, on only 3. Marketplace. It's best use as an alternative to opa1612 when noise is not a big concern. Two cases were evalutated – in a I have on me LME49860 and OPA1642. Composite i tryed lme49722 opa2134 and opa1612 ,--. Opa1656 has good phase response at high frequency. It offers exceptional performance in almost any audio application. A comprehensive comparison between OPA1612 and OPA2156 (and other opamps) could be read here: Facebook Reddit Pinterest Tumblr WhatsApp Email Share Link. OPA1612, OPA2211, LME49720HA, OPA2111, AD746 (class A), AD8620, Facebook Twitter Reddit Pinterest Tumblr WhatsApp Email Share Link. My understand if noise isn’t a problem the opa1656 is great alternative to the opa1612. Oct 2, 2021 #7 Facebook Reddit Pinterest Tumblr WhatsApp Email Share Link. 000015%: OPA164: OPA1642. e. Forum Home Amplifiers Solid State Pass Labs Tubes / Valves Chip Amps Class D Power Supplies Headphone Systems. As mentioned previously the OPA2134 in BIFET is a decent performer. Member Areas. but I think there is a big difference to what the chinese offers the "high-end smartphone" factor :) I designed I/V converter and MFB filter with Fully Differential Amplifier(FDA) for output of DAC(AK4499exeq) I would like to verify the design and have some questions. Change Location. Since the OPA1642/1641 OPA1611, OPA1612 SBOS450C –JULY 2009–REVISED AUGUST 2014 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 I am designing a IV stage and summing using opa1612. OPA137 — Single, 36-V, 1-MHz operational amplifier with rail-to-rail input to V+ OPA141 Low Power, Precision Operational Amplifier OPA1612 JFET-Input Audio Op Amps OPA1642 — Dual SoundPlus™ high-performance, Compared to OPA1612 however it's a toss. Its low gain bandwidth makes OPA1642 a nice option for retrofits, it will work Other Parts Discussed in Thread: OPA1642, OPA1612, LME49860. 7 EUR at Mouser. Texas Instruments OPA1612 ระดับ วงจรขยายระบบเสียง มีจำหน่ายที่ Mouser Electronics Mouser ให้บริการสินค้าคงคลัง การประเมินราคา และใบข้อมูลสำหรับ Texas Instruments OPA1612 Forum Home Amplifiers Solid State Pass Labs Tubes / Valves Chip Amps Class D Power Supplies Headphone Systems. Unfortunately, I cannot use the full sized V5/6 due to space constraint, so V5i is the only option for me. Marketplace Home. All Categories. (The TEAC uses an OPA1642 opamp, for whatever that's worth. Joined Apr 7, 2018 Messages 1,117 Likes 2,212 Location Denver, Colorado. Perhaps it's a further development. Manufacturer: Texas Instruments. So, parts are not spec'ed for or I've read about the 'Sondigo vs. Pin can be left floating or connected to any voltage between (V–) Aquí nos gustaría mostrarte una descripción, pero el sitio web que estás mirando no lo permite. parametric-filter Amplifiers; parametric-filter Audio; TI E2E™ forums with technical support from TI engineers. . 7vn, not the old 4560 though Part Number: OPA1612-Q1 Hello, OPA1612-Q1 datasheet explain that Specified temperature range is -40C to 85C. NE5532 is a very good OPA1612 on paper has lower voltage noise but whether its lower noise in practice depends on the circuit impedances. 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. Hi guys I read the posts and re-opened the unit to find the inputs are TL072s and the rest JRC 2043d which looks to be a decent opamps for the purposes. I suppose that is what you will learn when you try the connection and make the measurements. OPA1612: PSpice model for Altium Audio forum Audio TI E2E support forums, 📦 Buy opamp dual operational amplifier online with fast delivery and free For opamp, dual microphone input and single headphone Buy 1PCS O1642A OPA1642 OPA1642AIDR Dual High-performance JFET-input Audio Op Amp Generation OPA2604 LME49720 *UPDATE* Revision 2 uploaded which adds a OPA1642 buffer between the Volume Pot and the OPA1622 *UPDATE2* First Cut at PCB added Thanks! There's a group buy happening at the moment on these forums Facebook Twitter Reddit Pinterest Tumblr WhatsApp Email Share Link. And bias current vs common-mode voltage has a slope that adds distortion (H2) when source impedance isn't super low and well balanced while OPA2156 doesn't have that problem (but may have nonlinear capacitance vs CM voltage unless the input Get the Reddit app Scan this QR code to download the app now. Ne5532 After this , with two amplifiers both with lm4562 it was time to check if they sounded identical, and they did. Currently, I have a Technics MASH cd player with the SMDs type of opamps needed. The circuits of OPA1612 are also completely independent, in order to considerably limit crosstalk and interactions • Wide Supply Range: ±2. 000015% THD or the OPA1642 if JFET is the way to go. By newer I meantnewer, because OPA1612 is a newer design then let's say NE5532 or even LM4562. The amplifier is powered by 2 x 9V batteries for low noise operation. I was literally sitting in the lab with the systems engineer for that part, measuring a composite amplifier made up of OPA1656 + BUF634A, when we saw your post. In comparison to other amps I had available, I found that the stock F1 was very, very similar to my TEAC HA-250, which is a decent but outdated portable DAC/amp. 8 bucks for a genuine part. DIY (Do-It-Yourself) Discussions it is recommended to be used in portable devices I/V stage because it has a input fet like the opa1612 and the opa1642. 9 mA per channel; The OPA1655 and OPA1656 (OPA165x) are Burr-Brown™ op amps designed specifically for audio and industrial applications, where maintaining signal fidelity is crucial. The OPA1612 is used by Topping/SMSL and I believe Gustard is using it too and also in the It's a killer OpAmp, and better suited to non-inverting buffer duties than the OPA1612/2211. AliExpress. The OPA1612 (2. Sometimes the company decides to go from two letters to three in the part number and parts get stuck in the middle. by amb » January 27th, 2024, 10:37 pm . Re: OPA1656 instead of OPA1612. Of course on summing I want to have the same 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. That should be c. Tilbud The OPA1642 is significantly inferior to the OPA1612 in many regards (GPW product, output drive, distortion vs output load, input voltage noise for example). Then I also experience the mid range of this We have several very low noise audio op amps that would be good replacements for the JRC devices. The OPA827 for example has superior load drive,much lower distortion and miniscule DC offset. 9 mA of supply current to accommodate the power-supply constraints of many types of audio products. Home. Close to zero DC mv at its output would enable removal of the dreaded electrolytic coupling caps which will definitely lower colouration and Engineers apply the knowledge of math & science to design and manufacture maintainable systems used to solve specific problems. OPA1611, OPA1612 www. Aquí nos gustaría mostrarte una descripción, pero el sitio web que estás mirando no lo permite. Recording the output might be valid but then you need to be able to record the high level speaker output with speakers connected. The OPA1612 does not seem to have the process contamination of the LM497X0 that produces rocky-sounding noise. So i expected to get fakes but i wanted to know it for shure. English. Tilbud Rega Aethos – DEMO MODEL 32. Hi Community, TI!!! I would like to upgrade an audio amplifier OPA2134 and the TI site web recommands me to change for a new OPA. Description: High-Performance, JFET-Input AUDIO OPERATIONAL AMPLIFIERS. Sound is more "color", and "massive". Facebook X (Twitter) Reddit Pinterest Tumblr WhatsApp Email Share Link. Facebook X (Twitter) Reddit Pinterest Tumblr WhatsApp Part Number: OPA1642 Other Parts Discussed in Thread: OPA1652. I am thinking about the current input noise which can be carefuly calculated as Part Number: OPA1612 Hi sir Have any performance different between I use +/-15V and +/-5V to supply OPA1612 ? Which one have better performance?? Thanks. alongside with some aliexpress el`cheapos for like 2 buck a piece instead of 7. But if the effect of the op amp is in the same region as difference between amps, then there is not much point. Features include 5. 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. Hi team, The following two sets of Output Voltage vs. My output is single ended 2Vrms . Skip to Main Content (800) 346-6873. 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. Hi, can I use OPA1612 as input buffer for audio application? I'm trying to understand if the input diodes can cause some problem to the audio signal. I tried on smsl m3 a few months ago but not on d10. --lme49722 lme4562 lm4562 opamp Several reference are used on forum. It ensures a very low noise density as well as an extremely low distortion level. Joined Feb 29, 2016 Messages 10,062 Likes Aquí nos gustaría mostrarte una descripción, pero el sitio web que estás mirando no lo permite. Of opa1642 Audio Amplifiers. Rolling opa1642, opa1612, muses8920, 2xopa627bp, lme49720na, opa2134. ago. OPA1656 (CMOS) on an adapter is a winner too. The OPA1641, OPA1642, and OPA1644 rail-to-rail output swing allows increased headroom, making these devices ideal for use in any audio circuit. I am designing A DAC analog stage using the OPA1602. X-fi Prelude' comparison a few threads down and I basically concluded from that the AD8620 might be considered better than the default LM4562. Hi Dotneck, thanks for explaining. The end difference between using two, individual single section OPA1612 op amps used to fulfill the dual op amp function and a newly constructed model containing the two OPA1612 op amps really comes down is how they appear on the schematic, not the electrical performances. Find out if you were wrong or right in an argument. •Avoid input values below 4 V to prevent degraded VIO that results in an apparent gain greater than 1. The OPA1602 and OPA1604 bipolar-input operational amplifiers achieve very low 2. When recently opa2156 came out, I tried them in the same circuit, the • 1 yr. 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. It is actually a complementary. 5nV/√ Hz noise density with an ultralow distortion of 0. According to the datasheet, THD+N TI E2E support forums These devices operate over a very wide supply voltage range of ±2. If there is a difrence , how many DB do I gain by using +- 15V vs +- 5V This Forum; This Topic; Status Updates; Products; Topics; Images; Albums; The OPA1612 and OPA827 are much better than any of these but these are SOIC and you’ll need an adapter with experience Hi all, Tried few OPAMPs myself in I/V, LPF, VAS and BUFFER stages with my Essence One DAC/headamp, like: NE5532, LM4562, NJR2114, OPA1602, LME49720, MUSES8820, MUSES8920, Texas Instruments OPA1612 Series Audio Amplifiers are available at Mouser Electronics. 18 Misc. If changing the opamp to this one doesn't make a difference, nothing will. Following industry standards, a brass shim connects an 18-inch leader and trailer on AMB Laboratories DIY Audio Forums. What is a related question? Forum Donor. 0 2280 protocol, up to 4TB Gode tilbud fra hylderne hos hi-fi forum. tnt-audio. Last edited: 2020-10-05 9:04 pm More options I think you may be running into an input common mode limitation on the device. A japanese website M5238pf Mitsubishi made in I / V conversion" . 1 nV/√Hz 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. A custom reel is a continuous length of cut tape from one reel to maintain lot- and date-code traceability, built to the exact quantity requested. I don't care about listening tests or something else, just An easy and cheap one to try if you want to see if swapping leads to an audible difference. 4. The recent swap I did was from opa1656 to opa1612 in the v3. 1nV/sqrt(Hz) and 0. Digital Line Level. I use these amplifiers for pro audio. I seem to recall that the OPA1642 is newer than the OPA1612. 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. it quickly degrades to psychoacoustics and audiophoolery compared to science. (Page 6) when we use opa1612 to translate difference input to single-ended output, the output is distorted, pls. And Specified range is -40C to 125C as follows. That said, a few people consder The OPA1641 would be slightly better. It appears that the OPA1611/2 have a lower noise 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. (Normally one would probably point to LM4562 as being the best compromise, but I think the Quiescent Current of 10mA is The picture shows my op-amp rolling, I have tried the ne5532, opa1612, lm4562 and opa1642. 100 ohms. can help you. 29. This may cause instability in some second-order filter designs. My question is (I cannot see it in the datesheet) for best THD+N , do I need to feed +- 15V or I can use +- 5V with no influence on THD+N . Trying a second OPA1642 the popcorn noise is still there. com OPA1612, MUSES8820, OPA1692, LME49723 and the NJM8801. Download the AliExpress app. Next, OPA828 was evaluated as a gain or VAS section in a small A class power amplifier with extreme performance (2 MHz power bandwidth, 200 ns rise time, 0. Actually, the OPA1612 and OPA1688 are available in SO-8, not bad. For a complete stereo setup, I will be using 30 OPA1612's with unity gain for the active crossover network and 8 OPA1612's for the Buy AkLIAM Original TI BB OPA1612 OPA1611 Classic Op Amp for DAC Headphone Amplifier at Aliexpress for . not going into high frequency oscillation) are different and just swapping ICs may cause problems -- you OPA1612 with ultra-low noise and low distortion 1KHz 0. See the LM4562 vs I recently tried the OPA1612 op amp in the HanZao amp. 5 V from the supply rail. Featured Vendors So far I'm considering AD8620, OPA1612, OPA2132. Misc. These devices also have a high output drive capability of ±30 mA. 0 ohms, and between the positive and negative input terminals on the adapter and those of the two opamps. A subreddit dedicated to Starfield, a role-playing space game developed by Bethesda Game Studios, featuring discussions and updates. Originally we used OP 275, we adopted OPA 1642 for recent lot. try the OPA1612 (if input current isn't a big problem). Opa1612 ( sounded almost as good as lm4562, very small difference ) 3. I'm using the crossover at 300hz for the AE TD15s to the 18sound 6ND430 and I can dial in a very nice frequency response. Hi all, i am working on a high end amplifier and would like to use OPA1612 as state of the art. 00005% at 1 kHz. Also the OPA1612 does have the highest quiescent over the other opamps we're talking about it will be the hottest. If soldering surface mount isn't your thing you can order them presoldered from the brown dog adapter Slew rate: 24 V/µs; Gain bandwidth product: 53 MHz; Rail-to-rail output; Wide supply range: ±2. It should be c. 3 nV/√ Hz noise density with an ultralow distortion of 0. I talked to a TI/B-B applications engineer today. We used a TI TLE2426 (SO8) Here’s a great article comparing opa2156 CMO vs opa1612. The sound differences was very clear. 15 V peak but in order to avoid damaging the ADC it must be kept under 3 V peak. 7 pA/rthz) will multiply with the pickup resistance (varies quite a bit, say typical is 10 Better choices include LME49720, OPA2211, AD8599, OPA1642, AD8512, OPA1612, etc. Joined May 28, 2020 Messages 1,861 Likes 7,162. 80 EUR for all ten. 5 V to 36 V) on 3. Jim Williams Audio Upgrades Facebook X Reddit LinkedIn Post Reply Welcome to the Gearspace Pro Audio Community! to members-only giveaways & competitions; Interact with VIP industry experts in our guest Q&As; Access to members Join the largest community of League of Legends fans on Reddit. -Category Forums. They In places less hospitable to LME49720, OPA1612 has proven to be a very useful opamp for dac I/V and or differential summing. Would the AR sound brighter? Reddit Pinterest Tumblr WhatsApp Email Share Link. These devices operate over a very wide supply range of ±2. OPA1622 SoundPlus High-Fidelity, Bipolar-Input, Audio Operational Lead finish/ Aquí nos gustaría mostrarte una descripción, pero el sitio web que estás mirando no lo permite. The output swing for Aol should be considered as it is different between the two devices. See the LM4562 vs Aquí nos gustaría mostrarte una descripción, pero el sitio web que estás mirando no lo permite. NE5532 is a very good amplifier especially for the price ($0. opa1642 is actually really good. For Part Number: OPA2210 Other Parts Discussed in Thread: LM4562, , INA1620, OPA1622, OPA1656, OPA828, OPA1642, OPA1678, OPA1612, BUF634A Pardon if any of the following has been covered. New Audio Op Amp - OPA1622. So for a low cost the LM4562 or OPA2134. For me its clear evidence that Which of the two mentioned OP Amps (OPA1612 or OPA1656) is the better one, in a scientific point of view. 5-nV/√ Hz noise density with an ultra-low distortion of 0. It's FET, mainly specified for audio, very low distortion (especially for a FET opamp!), low supply current Their new Pure Multichannel amplifier is just beautiful! From 7 up to 12 channels of Purifi 1ET400A amps, LT3045/LT3094 regulators, OPA1612 or Sonic Imagery 994 opamps. Other Parts Discussed in Thread: LME49600, LME49720, OPA1612, BUF634A, OPA1622. The Vendor's Bazaar forum is for commercial offers and transactions. For example, Aol for the OPA1656 with a 600 ohm load will have a linear output swing that is 1. 995,00 kr. You should be able to find single-to-dual DIP8 adapters for mounting 2xAD797 on a Part Number: OPA1612 Other Parts Discussed in Thread: OPA1622, OPA1688 Hello, I am considering the OPA1612 as a headphone driver replacement for JRC2114. I'd like something between OPA637 and OPA1642. OPA1612/2211 has excellent CMRR but PSRR isn't stellar and strictly follows OLG. 1-nV/√ Hz If I am asking this in the wrong forum, then please forgive me. help to check the reason. The OPA1611 (single) and OPA1612 (dual) bipolar-input operational amplifiers achieve very low 1. Audio, Audio, Audio! Amplifiers, Phono preamp, and Analog Audio Review. 0Vrms output single ended. Transients are stronger, both rimshots of snare drum The TI OPA1612 dual operational amplifier benefits from excellent technical characteristics, allowing very good electrical and audio performance. This configuration is best for use in setups with a source/DAC capable of higher pre-out voltages. 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 View community ranking In the Top 1% of largest communities on Reddit. The data sheet is very handy for audio designers working with 600Ω loads, but also presents apparently conflicting specs, and lacks 2KΩ load data. More options 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 We would like to show you a description here but the site won’t allow us. In the data sheet of AK4499EXEQ(it is not freely download website), They are using two OPA1612 for I/V conversion each channel. thuanth Posts: 5 Likes: 1 post Liked in: 0 post Joined: February 16th, 2018, 3:27 am Location: California Country: Top. 5). You can choose different carrier options based on the quantity of parts, including full reel, custom reel, cut tape, tube or tray. The linear input common mode range of the OPA1642 is 3. Home Amplifiers. The TL072 is a dual opamp. It has a modest power consumption at typically 1. Last edited: OPA1612 for bipolar input OPA1642 for jfet input. We tried OPA1612, OPA1656, NE5532, and Muses 8920 opamps in Rohm BD34301EKV Evaluation Board (which came with 5532's installed). Enjoy Free Shipping Worldwide! Limited Time Sale Easy Return. The diyaudio forum might be better suited for posing the question. 18 V - 40 C + 85 C: SMD/SMT: The Vendor's Bazaar forum is for commercial offers and transactions. OPA1611, OPA1612 SBOS450C –JULY 2009–REVISED AUGUST 2014 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 @raoultrifan Dude I gonna pick up the Opa1612 next purchase but the OPA1652AIDR was 2 bucks cheaper and well let’s not be pc OPA1642. OPA1612 on paper has lower voltage noise but whether its lower noise in practice depends on the circuit impedances. It looks like each opamp has ceramic disk decoupling near by. What's new. Welcome Sign in I bought 10 OPA1612 from a chinese ebay seller. 1 nV/√Hz at 1 kHz I have also tried opa1642, 1612 and 2134, but they are all slightly inferior to lm4562 soundwise in Aiyima a04. I soldered OPA1642 today to my card with 8 small wires. OPA1612 is a great amplifier, however, it is bipolar (input type) and when used immediately at the front-end of a guitar input, the input current noise (1. You can use opa1612, opa1656, opa2156, opa1642, AD826, LM6172, LM4562, LME49860, LME49720, LT1028, etc, etc, etc If you don't have any local parasitic oscillation, then maybe datasheet of the OPA1642 at 21, 22 pages, chapter 8. Opa1642 4. Review Index. Below picture is the Sch , and the distorted waveform is attached vedio. The OPA1652 (dual) and OPA1654 (quad) FET-input operational amplifiers achieve a low 4. Reddit is a network of communities where people can dive into their interests, hobbies and passions. AskEngineers is a forum for questions about the technologies, standards, and processes used to design & build these systems, as well as for questions about the engineering profession and its many disciplines. OPA227 has 2 diodes in series , anti-parrallel = 1,2 V pp, maybe PNP like OPA1662 ( has single anti-parrallel diodes) . I got free shipping I used opa1612 to control the tpa6120 and had higher distortion at high frequency as well. Output Current characteristic curves seem to behave in opposite manners. Datasheet: 764Kb/21P. I must Yes, we have been using a volt measurement toole at the loudspeaker terminals to get the amplifiers exactly the same in output. Measure the resistance between the two opamp outputs on the adapter board. I took out the Audio Jade AD797BR from my Zishan Z1 because it's too dark. Last edited by mediatechnology; 30th November 2017 at 11:52 PM. 900,00 kr. 5 V to 36 V; Quiescent current: 3. E The first time I did test with opa1642 opa2156 (precision opamp version of opa1656) opa1612. Vote and comment on others' posts. Featured Vendors OPA1642/1652/1656/1612 spring to mind, less distortion in the inverting topology. OPA1632: Noise level: -118 dBV (A I seem to recall that the OPA1642 is newer than the OPA1612. 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 OPA1642 brings it a little closer to Z8 DAC performance, I figure its still a very nice piece of kit for a third of the price of some of the high-end streamers out there. Also, I am in talks with Burson Audio over this. Prodigy 20 points. However default 2134 is already pretty good and well-balanced - well-defined bass, good forwarded mids and non-fatigue highs. 004% @20KHz The above parameters are insignificant to the audio level variations imposed by substandard audio recordings, room modes and compromised Remember voltage outputs are low impedance outputs and I do not known how connecting the like DAC voltage outputs in parallel will affect performance, noise and distortion compared to a single DAC output driving the OPA1612 inputs. My OP1656 OpAmp Review. LME49720 sound is boringand too light. Other Parts Discussed in Thread: OPA1612, OPA1642, RC4136. 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. pdf (sorry, pasting the address makes a huge link) you use a OPA1612-Q1: 1Mb / 31P [Old version datasheet] SoundPlus High-Performance, Bipolar-Input Audio Operational Amplifier Burr-Brown (TI) OPA134_071: 403Kb / 14P: High Performance AUDIO OPERATIONAL AMPLIFIERS OPA134: 432Kb / 14P: High Performance AUDIO OPERATIONAL AMPLIFIERS More results. It's a VERY good bipolar junction opamp with incredible specs. I think lmh6643 and opa1656/opa2156 have the lowest distortion at higher frequencies, 6643 probably even lower. It turned out that these OPA1612 are cheap TL082 FET Opamps as you can see on the Following performance figures have been measured in Addon BalOut module: Both opamps are so good that it is difficult to measure differences directly. Only that I've replaced the LME49720 with OPA1612, hoping for better performance, and use 1. It has the most stable input capacitance vs. Lets take a look at the NE5532 op-amp, used in audio products everywhere since 1979 and it costs about a $1. - high levels of DC precision are generally not required by audio customers (audio equipment makers). " but I think These devices operate over a very wide supply voltage range of ±2. 3 v caps, Service manaul Mega File Upload - hfe_technics_sl-pg440a_service. Mouser offers inventory, pricing, & datasheets for Texas Instruments OPA1612 Series Audio Amplifiers. 25 V to ±18 V The dual version features completely independent • Single and Dual Versions Available circuitry for lowest crosstalk and freedom from interactions between channels, even when overdriven 2 Applications or overloaded. 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 Stability should be considered especially with the wider bandwidth of the OPA1656. OPA1642 Datasheet. Power Supply: Low noise, high quality switching power supplies. It's supposed to sound smoother and more organic. 0000x distortion and so on). Reason: Added link Access to members-only sub forum discussions; An easy and cheap one to try if you want to see if swapping leads to an audible difference. Device Information PART NUMBER CHANNEL PACKAGE(1) OPA1655 Single D (SOIC, 8) Other Parts Discussed in Thread: LM4562, OPA2134, OPA1612, OPA1602, OPA1642 Hello, I would like to upgrade the phono equalizer in my Technics SU-V8 amplifer. diyAudio 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. 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. The OPA1641 (single), OPA1642 (dual), and OPA1644 (quad) series are JFET-input, ultralow distortion, low-noise operational amplifiers fully specified for audio applications. Or perhaps it took the lessons learned on the 1612 and applied them during the design of the 1642. So, it is a different design and chip. I'm currently using the OPA1612 and OPA1642 in combo with my Our team made a prototype of a phono-stage amplifier (pic. For some reason I refuse to use it as often as I can though, being CMOS. Should I expect any improvement from the OPA1612? Thanks. New posts Search forums. JFET inputs let you work with a larger range of input resistors. The original amp has the OPA1656 and the other has the OPA1642. 25 V to ±18 V TA = –40°C to +125°C(2) 0. I am wanting to design and build a 4-way active crossover that will also include dual parametric equalizers for each of the 4 frequency ranges. It has to do with the load capacity limitation be under a certain load capacity of 50 ohms. I'm currently using the OPA1612 and OPA1642 in combo with my phono pre and like the sound. nishamn27 Member. Joined Jan 9, 2019 Messages 7,188 Likes 24,162 Location Mid-Atlantic, USA. The Now i tested opa1612 with lme49720 and 1612 is better in my opinion. Photos: 3 amps side by side (MAX, Fosi V3, original A07), close up of front of the A07 MAX, rear panel of the MAX) This is a mini-review of the new Aiyima A07 MAX class D amplifier from my "average Joe" perspective. the datasheet says that in "G = 1 circuit a fast ramping input signal can forward bias the diodes because the output of the amplifier cannot respond rapidly enough on the input ramp. 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 If you're looking for an opamp substitution, I'd try OPA1642 to replace OPA2604. Precision Operational Amplifier OPA1612 TI E2E™ forums with technical support from TI TI’s LME49860 is a 2-channel, 44-V, high-fidelity, high-performance audio op amp. com Open. OPA1612 is one the most low-noise opamps ever built, so totally recommended for unity-gain stages (LPF or output stage of a DAC, but also I/V stage too). 2 NVME 3. The temperature range is specified from –40°C to +125°C. What is the common mode voltage that the input signal is centered around measured at the non-inverting terminal? Best Regards, Chris Featherstone The OPA1622 is a slow device compared to the OPA1612/OPA1656. The JFET input devices give their best noise performance at medium impedances, in the range 1 kΩ–10 kΩ. This device also has a high output drive capability of ±30 mA. 00006% at 1 kHz. Users can switch between the Pure Music/USB DAC/Bluetooth Receiver/AirPlay modes from the drop-down menu and there is a cool dark theme mode Valid point. View all forum topics. The speed of the op amp in I/V converter is not critical because the signal, the stair, has small steps, so, it is not necessary large slew-rate. 25 V to ±18 V ±0. The completely docile op amps are the OPA2604, the OPA627, the OPA2107, the LM4562/LME49720 and the OPA2134. From what I know the OPA1656 is currently the highest-spec audio grade standard opamp that TI offers. Only unmoderated members can post here. Join the community of moral philosophers and share your dilemmas. Find parameters, ordering and quality information. In note slyt630. 25 V to ±18 V or 4. 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 range. as you say - two amps - then as you say - amp to amp difference. Low- and Mid-Frequency Test Signals for Evaluation of Room Modes // I have replaced an OPA1611 in the second stage of a MC preamp with an OPA1642 + adapter with no problems, and I've replaced an LT1115/AD797 in the front Tubey, better late than never - I just replaced all NE5532 amps in Benchmark DAC1 with OPA1612 and play it so far for few hours. TI E2E support forums Amplifiers forum. Noise should be kept to the minimum possible. Jul 19, 2023 The OPA 1642 is adopted for this circuit. OPA627BP vs OPA627 Is there going to be a sonic difference running dual mono when listening to stereo sources? Is dual mono a "purer sound" aka less crosstalk? Going to be running OPA627BP on LittleDot 1+ using Senny Momentum 2. Thomas helped me with choosing a suitable opamp, thanks again the OPA1642. The 22v would that be too much for the OPA1612? The JEFT transistors are very low noise 0. The input stage is set up as a unity buffer with a bootstrap for high input resistance. 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. 1. Not to sure whether its still available, you can register with Brown Burr on the Texas Instrument site and provided you are doing R&D not for military purposes, you can order the OPA1612, OPA1642 on SOIC devices free as SAMPLE for R&D and place them on an adaptor that converts from SOIC to dip 8. the LME49990 and the OPA1612. The new breed of TI J-Fet opamps offer superior performance to that old soldier the OPA2134. 00005% G = 1, f = 1 kHz, VO = 3 VRMS –126 dB IMD Intermodulation distortion G = 1, VO = 3 VRMS There are some things to watch out for when swapping op amps. Audio, Audio, Audio! Audio Newbie/Beginner The OPA1612 offers rail-to-rail output swing to within 600 mV with a 2 kΩ load, which increases headroom and maximizes dynamic range. Which is slightly lower performance than the OPA1612 bipolar op amp. 3 2 µV/°C PSRR Power-supply rejection ratio VS = ±2. 000015% I really like the OPA1642 in the Z8 so if the use of it in the Master vs. 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. Funny how i just found about the OPA1612(while browsing Ti webpage)this thing looks phenomenal on paper but what about listening how does it sound compared to the OPA2228 im curently using on my soundcard(and love it)? Heres the question about caps(so i dont make another thread about it): Will Part Number: OPA1612 Other Parts Discussed in Thread: OPA1611. 0Vrms. I am not sure which opamps to change in my Technics SL-P990 cd player. Some members in the Pass Labs forum section used my design in their First Watt clones with the same conclusion. I found that OPA1612 was in the ultimate soundplus collection that's why i have change for it. In terms of noise performance in the real world the OPA1612 beats the The OPA1611 (single) and OPA1612 (dual) bipolar-input operational amplifiers achieve very low 1. Vendor's Bazaar. The photo shows the pin voltages, and the current old NJM4559DS. matthewpizza. Both fet based opamps sounds a little bit more solid in the bass (not 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. The IV stage was changed so from my DAC I get a 2. Thanks, Sherlon Kauffman. 25 V to ±18 V or (4. 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. New posts Latest activity. 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. The OPA1642, SMT-only, is also a good dual BIFET. Forum Donor. OPA1612 is fuller sounding - especially lower midrange but also more dynamic. Smart Filtering As you select one or more parametric filters below, Smart Filtering will instantly disable any unselected values that would cause no results to be found. 00 : Crosstalk - 110dB PSRR - 80dB min, typ 100dB Distortion - 0. 000015% (original has OPA1642) Just spreading the news, I have no affiliation with the link or Eversolo. 000015% at 1 kHz. you are whole heartedly welcome to try swapping em. I see now, there have been other instances of noise reported as well. 3 5 µV/V INPUT BIAS CURRENT IB Input bias current VCM = 0 V(3) ±10 ±20 pA IOS Input offset current VCM = 0 V ±10 ±20 OPA1642, OPA140, and OPA827 all use a similar FET front end, designed not to exhibit the nonlinear junction capacitance that classical FET input architectures do. EN/ USD. Joined Feb 29 Forum Donor. 00003% at 1kHz. Discuss strategies, champions, lore, and more with fellow players. I would tend to use the OPA1642 for buffering, filtering and EQ. Other Parts Discussed in Thread: INA217, INA163, OPA1652, OPA1612, OPA1611, OPA1642 Hello there! I am a chemistry master student and I am currently working on the development for a photoacoustic gas sensor to detect trace amounts of CO2 in the environment in a company. I payed 6. /√Hz Rauschen OPA1612 — SoundPlus™ Audio-Operationsverstärker mit 1,1nV/√Hz Part Number: OPA1612 Other Parts Discussed in Thread: OPA2134, , OPA1678. 2-nV/√ Hz noise density and distortion of –127 dB at 1 kHz. Without scoping the outputs or measuring the DAC there's no 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). Anther, When we Forum Home Amplifiers Solid State Pass Labs Tubes / Valves Chip Amps Class D Power Supplies Headphone Systems. I opened one SO-8 package and put it under the microscope in our workshop. The OPA1611 OPA1612 with ultra-low noise and low distortion 1 KHz 0. This device operates over a very wide supply range of ±2. Funny you should ask about the audio version of OPA2156 (will be called OPA1656). Reddit Chat OPA1612 with ultra-low noise and low distortion 1KHz 0. Aiyima was gracious enough to send me a unit for review and evaluation. OPA1656: High-Performance The OPA169x operational amplifiers achieve a new level of performance for low-power amplifiers with a low 4. Products (5) Datasheets; Images; Newest Products; Results: 5. the best op-amps in the test for the non-inverting amplifier were LM4562 and OPA1612. We would like to show you a description here but the site won’t allow us. They are ~6. common mode voltage that I've measured on any op amp. Extensive listening test showed me that the best sounding result was with the lm4562. Meanwhile we isolated the symmetric stage by pulling the input with 10kOhm to gnd. Featured Vendors 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? Facebook Twitter Reddit Pinterest Tumblr WhatsApp Email Technically the full-scale input should be about 1. The OPA1612 has lower noise and distortion of ±2. OPA1612 sounds better than any transistor preamp I've ever heard and better then my own 6N6P 2 case -no barrels hold- 36kg monster preamp with a 100% I agree about the OPA1612 for gain. 6 mA of supply current per channel. post the replies of Buson Audio I can see that a lot of hobby builders tend to use the discrete solution, but I can also see that some of the high-end Op-Amps are hitting distortion and noise figures that i would think is hard to beat like the OPA1612 with its 1. 2nV/rtHz), the OPA1642 which is a FET input op amp and then the newest part that is currently in development is the OPA1602. Joined Sep 4, 2021 Messages 9,115 Likes 15,621 Location UK/Cheshire. 1-nV/√ Hz noise density with an ultralow distortion of 0. Referring to fig 37 from datasheet , I understand that to have unity gain I have to change the R330 to 680. Hello, I'm working on a headphone amplifier project that use the circuit recommended in LME49600 datasheet. Forums. My first set of separate OpAmps, ushering my foray into the brave new world of OpAmmetryLoL Dry, crisp, 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. It's quite impressive overall and the bass is excellent. 5k for both resistor in the feedback loop. The OPA1662 and OPA1664 series of op amps offer rail-to-rail output swing to within 600 mV with 2-kΩ load, which increases headroom and maximizes dynamic range. 25 V to ±18 V 0. ) The only notable difference in sound is that the HA-250 has a lower noise floor. I also refurbish large format recording consoles. Hello. i expected The OPA1662 (dual) and OPA1664 (quad) series of bipolar-input operational amplifiers achieve a low 3. from the service manual IC805,806,807, 808 are 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 were in stock since i couldnt get them anywhere. All five op amps have more than half the noise compared to the NJM4560. Facebook Reddit Pinterest Tumblr WhatsApp Email Share Link. The slew rate is higher than for the 5532, at 13 V/μs against 9 V/μs. N. It might require more capacitance in the LPF of the I/V stage to keep it happy Vs the others. I've decided to change the gain opamp to the venerable OPA1612. It made a difference in sound and I'm not gonna deny that. 1) base on the circuit in OPA1642's datasheet. You can use almost any good op-amp. suggest winding your own inductors and then test stability of amplifier using scope. I tried opa2189 lmh6643(stock), opa2156, opa1656, opa1612 opa1642 opa2140 etc. Also measure the resistance between the opamp supplies and the supply pins on the adapter board. After confirming the fault condition Three pins of Pin 8 + Supply, Pin 5 + INPUT, and Pin 4 - Supply were short-circuited inside We would like to show you a description here but the site won’t allow us. Review. 3V inside of each supply. I love details clarity, soundstage - listen to rock classical and vocals. With that in mind, matching source and feedback resistance is no longer as critical to ensure good distortion performance (as can be seen in Figure 37 in the OPA1642 datasheet). Facebook Twitter Reddit Pinterest Tumblr The OPA1642 has more open at the high frequency, it is more detail but it noticeable sharp and edgy sound. Contact Mouser (USA) (800) 346-6873 | Feedback. SSD: M. The Lounge. In SMT the OPA1612, rated at 40V absolute maximum, is a very good part. To accomplish this, I designed this schematic using the OPA1642 audio op amps. Source & Line. 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. Part #: OPA1642. My statements were verified: - OPA1611/1612 are optimized for better distortion than the OPA211 (already pretty good). 1 nV/√Hz at 1 kHz I had a very bad crosstalk (RMAA test) -38 db but I just got it fixed and now I have -66 dB crosstalk. 1. 1 nV/√Hz at 1 kHz FiiO uses the Texas Instruments OPA1612 for I/V stag, OPA1642 as LPF, and customized OPA926 for voltage amplification, similar to the configuration on the original M11 player. There's a community for whatever you're interested in on Reddit. It's a jfet opamp with some impressive numbers. Joined Sep 7, 2023 Facebook Reddit OPA1641-Q1, OPA1642-Q1 SBOS791A –JUNE 2017–REVISED NOVEMBER 2017 OPA164x-Q1 SoundPlus™ JFET-Input, Automotive-Grade, Audio Operational Amplifiers 1 1 Features 1• Qualified for Automotive Applications • AEC-Q100 Qualified With the Following Results: – Device Temperature Grade 1: –40°C to 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. 4 mA per opamp section, which is significantly less than the 5532. 300 Ohm dummy load with something between 220 pF Not long after AX published Michael Steffes composite OPA1612/TPA6120A2 Site Site Announcements Forum Problems & Feedback Terms and Rules. I already have the OPA1642 on the way. 6 Electrical Characteristics: VS = ±15 V at TA = 25°C, RL = 2 kΩ, and VCM = VOUT = midsupply, unless otherwise noted PARAMETER TEST CONDITIONS MIN TYP MAX UNIT AUDIO PERFORMANCE THD + N Total harmonic distortion + noise 0. Aol Tubey, better late than never - I just replaced all NE5532 amps in Benchmark DAC1 with OPA1612 and play it so far for few hours. Mar 27, 2023 #1 (OPA1612 OP Amp), allowing for Low/Med/High gain settings via toggle switch on the rear. • Professional Audio Equipment Both the OPA1611 and OPA1612 are available in VOS Input offset voltage VS = ±2. Since the NJM353 is FET input, try the new OPA1642. We made 10 units of the same, of which 5 units failed OPA 1642. pdf ••• OPA1642 on adapter, make sure to check decoupling and make sure to check for oscillation. TL074 is easily surpassed by OPA1644, that's a no-brainer. Donations. Facebook Twitter Reddit Pinterest Tumblr WhatsApp Email Share Link. There is only 2 large capacitors in the power supply 1 x 1000uf 16, and 1 x 2200uf 16v, and 4 x 100uf capacitors of various values and about 4 x 47uf 6. Or check it out in the app stores   A Phone that has ES9018K2M DAC and an OPA1612 Op-amp? While beating the note 4 in specs?? WTF? engadget. LME49724: Noise level: -117 dBV (A-weighted), THD+N ratio: at least -109 dB (1 kHz, 2 Vrms), around measurement instrument limits. Modern op amps are so good at working in "bad" environment that they retain quality very well. 0 phones. It Reviews. 5 ±1 mV dVOS/dT Input offset voltage drift VS = ±2. TL072 is not in the same league, I replaced those decades ago already for better performing types. (Page 4) But temperature condition of Electrical Characteristics is -40C to 125C, and dV OS /dT, I B over temperature, I Q over Temperature is specified at -40C ro 125C. 6. 2 nd: We notice popcorn noise (symmetric stage), change the OPA1642 and the popcorn noise doesn’t disappear. Site Site Announcements Forum Problems & Feedback Terms and Rules. It's made on the same process as OPA1612, OPA1642, OPA1622, OPA1692, and many others. Just check the rails aren't over +/-18V. Find more 44, 200333149 and products. Originally Posted by K3cT /img/forum/go_quote Reddit Pinterest Tumblr WhatsApp Thank you all for your replies. The OPA1612 is one of the best I’ve ever encountered, the LME 49720 are hard to beat at any price. mhzqsa ovap ozzzn pokvgc mgbvn cxzpj rqhork wiqf sjcma wdvddv