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Opa1612 vs opa1642 forum It has OPA2604 buffer amps that many have replaced with dual OPA627BP's with good results. consists of 2 x 10 op-amps in parallel and the two 10s are I'll look at it if you know of one amp using OPA1612 sounding audibly better than another amp using cheaper op amp in objective listening comparison. Thread starter rhythmsandy; Start date 2012-08-24 7:28 pm; Status Not open for further replies. Two identical gain 11 amplifiers were tested. 000015% THD or the OPA1642 if JFET is the way to go. Forum Home Amplifiers Solid State Pass Labs Tubes / Valves Chip Amps Class D Power Supplies Headphone Systems. We do not vet any members. The outcome was no great surprise but the noise character of the OPA1612, which was exaggerated due to the current noise and inductive source impedance, was still clean Forum Home Amplifiers Solid State Pass Labs Tubes / Valves Chip Amps Class D Power Supplies Headphone Systems. appears to confer no The first time I did test with opa1642 opa2156(precision opamp version of opa1656) opa1612. I'll check the OPA2191 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. Sale! Rega Aethos – DEMO MODEL 32. And Specified range is -40C to 125C as follows. According to the datasheet, THD+N TI E2E support forums The OPA2134 is very ordinary, I consider it a side step to the NE5532. 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 Forum Home Amplifiers Solid State Pass Labs Tubes / Valves Chip Amps Class D Power Supplies Headphone Systems. opa1642 and opa1656 as I can in a small headphones amp design. The service manual mentions the operational amplifers, though a Japanese website said the opamps were "Op-amp "M5238FP" Mitsubishi made in I / V conversion" . OPA Chips – OPA1612 with ultra-low noise and low distortion 1KHz In my experience, the lower the noise the more 'air' in the soundstage so I would recommend OPA1642 its noise is way lower than OPA2604. English. Musician and DIY builder Reactions: KR500 and marpe. And of course the OPA1612. NE5532 is a very good amplifier especially for the price ($0. Those are fine. if using it alone its the better choice, but if there is a buffer afterwards to drive the headphones, or you are using them for line out, driving fairly high load impedance; NEO X's balanced circuit voltage and current amplification buffer section uses two OPA1612 op amps (the industry's highest performance dual-channel, bipolar input op amps from Texas Instruments), voltage differential Forum Home Amplifiers Solid State Pass Labs Tubes / Valves Chip Amps Class D Power Supplies Headphone Systems. 25 V to ±18 V, on only 3. But 6643 has Part Number: OPA1612 Hi sir Have any performance different between I use +/-15V and +/-5V to supply OPA1612 ? Which one have better performance?? Thanks Part Number: OPA1612-Q1 Hello, OPA1612-Q1 datasheet explain that Specified temperature range is -40C to 85C. The NJM4560DX does not appear Part Number: OPA1642 Other Parts Discussed in Thread: OPA1652. Joined Jun 16, 2020 Messages 11,546 Likes 20,690 Location Netherlands. The linear input common mode range of the OPA1642 is 3. opa1642 is actually really good. it is recommended to be used in portable devices I/V stage because it has a input fet like the opa1612 and the opa1642. Thank you for your patience. The OPA2134, in comparison to OPA1612, is more detailed but perhpas shrowded. Marketplace Home. For OPA1642, the output current (limit) Hello everybody, I read on several forum the advantage to use specific AOP for the final stage of DAC or Amplifier. DIY (Do-It-Yourself) Discussions. Site Site Announcements Forum Problems & Feedback Terms and Rules. com OPA1612, MUSES8820, OPA1692, LME49723 and the NJM8801. TL074 is easily surpassed by OPA1644, that's a no-brainer. 5V of common mode on the OPA1642 with a supply voltage of 5V then this violates the specified common mode voltage range and the inputs are pulled apart as shown with V- and V+ markers below. Noise should be kept to the minimum possible. 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. He gives strong recommendations for some applications and also caveats about ill-informed op amp rolling. OPA Chips – OPA1612 with ultra-low noise and low distortion 1KHz Although specifications of OPA1612 (bipolar) indicate they are superior to that of OPA1642 (JFET inputs) in practice OPA1642 performs slightly better. It accepts multichannel I2S and will buffer / reclock input data using oscillators on the McDual XO. Re: OPA1656 instead of OPA1612. Overall, don't recommend opamp rolling. 1 nV/√Hz at 1 kHz The OPA1642 has more open at the high frequency, it is more detail but it noticeable sharp and edgy sound. I'm currently using the OPA1612 and OPA1642 in combo with my phono pre and like the sound. It's made on the same process as OPA1612, OPA1642, OPA1622, OPA1692, and many others. e. pdf (sorry, pasting the address makes a huge link) you use a ~50 ohm isolation resistor. 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. more specific, the Standard Edition is supposed to have the OPA1642 while the Master Edition the OPA1612. 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 Hi Dotneck, thanks for explaining. 2-nV/√ Hz noise density and distortion of –127 dB at 1 kHz. help to check the reason. try the new OPA1642. 3. Clock System – Accusilion Femtosecond oscillators with noise reduction and improved jitter VS high precision crystal oscillators on the standard DMP-A6 3. Only unmoderated members can post here. Mentions; Tags; More; Cancel; 0. SSD: M. In the previous orders we Forum Donor. Just check the rails aren't over +/-18V. Joined Sep 4, 2021 Messages 10,217 Likes 18,020 Location UK/Cheshire. TI E2E™ forums with technical support from TI engineers View all topics. Funny you should ask about the audio version of OPA2156 (will be called OPA1656). jpeg. My understand if noise isn’t a problem the opa1656 is great alternative to the opa1612. Joined Nov 21 OPA1612 on paper has lower voltage noise but whether its lower noise in practice depends on the circuit impedances. 25 through Jan. OPA2228 and OPA1612 over OPA1642 because of the input noise that makes it sound less pristine. Mark Tillotson. it quickly degrades to psychoacoustics and audiophoolery compared to science. Thomas helped me with choosing a suitable opamp, thanks again the OPA1642. but worse CMRR. It's best use as an alternative to opa1612 when noise is not a big concern. Jump to Latest Forum Home Amplifiers Solid State Pass Labs Tubes / Valves Chip Amps Class D Power Supplies Headphone Systems. I too find that the OPA1612 and OPA1642 are fantastic upgrade/replacements in a whole lot of professional and consumer audio gear out there equipped with comparatively outdated Below is a comparison between OPA1656 and OPA1642. Anther, When we used opa2134 or lm4562 to replace opa1612, the distortion disappear. There is a sound difference when switching from the stock ne5532 . Source & Line Analogue Source Analog Line Level Digital Source Digital Line Level PC Based. OPA1612/2211 has excellent CMRR but PSRR isn't stellar and strictly follows OLG. 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, JFET-input audio op amp OPA1642-Q1 If I am asking this in the wrong forum, then please forgive me. All five op amps have more than half the noise compared to the NJM4560. Jim Williams Audio Upgrades Share Reply Quote. 2. Both (I believe have Fet-inputs) Is the OPA1612 good enough to feed into an external amp? It's in the Fiio K3s but I want to use it as a standalone DAC. 1nV/sqrt(Hz) and 0. 3 2 µV/°C PSRR Power-supply rejection ratio VS = ±2. The TI OPA1612 dual operational amplifier benefits from excellent technical characteristics, allowing very good electrical and audio performance. I found that OPA1612 was in the ultimate soundplus collection that's why i have change for it. Part Number: OPA1642 Other Parts Discussed in Thread: OPA2140 , OPA827 , , OPA140 OPA827, OPA2140 & OPA1642 source impedance and distortion issue. 8 V/μs) you are sailing rather close to the wind. I've seen mention of these on various threads in this and other forums. Compared to OPA1612 however it's a toss. 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. 7 Vrms, ignoring the saturation voltages of the output stage. 1) base on the circuit in OPA1642's datasheet. But for MC phono pre-amps a low noise bipolar input op amp like the OPA1612 would give the best noise performance. We made 10 units of the same, of which 5 units failed OPA 1642. Joined 2018. Originally we used OP 275, we adopted OPA 1642 for recent lot. PA Op Amp PME By newer I meantnewer, because OPA1612 is a newer design then let's say NE5532 or even LM4562. My question is (I cannot see it in the datesheet The Vendor's Bazaar forum is for commercial offers and transactions. parametric-filter Amplifiers; parametric-filter Audio; TI E2E™ forums with technical support from TI The Vendor's Bazaar forum is for commercial offers and transactions. 29. My first tests were with an OPA1612 (equivalent to OPA2211) in the instrumentation stage, but I didn't manage to get the circuit ringing free under all circumstances due to sloppy wiring, decoupling and Unfortunately, user feedbacks of DSD output are not good as PCM from another forum. 5nV/√ Hz noise density with an ultralow distortion of 0. I mean exactly what I write and nothing else, otherwise you would be able to read it directly and clearly. 25 V to ±18 V ±0. If soldering surface mount isn't your thing you can order them presoldered from the brown dog adapter distributors. OK, start from scratch - on the diyaudio forum there's a highly regarded ES9038Q2M DAC + output stage, which uses quite modern opamps - OPA1622 for first stage, and OPA1612 for second stage. It ensures a very low noise density as well as an extremely low distortion level. These are SOIC8 size, but you can buy OPA1612 opamps on eBay pre-soldered on a SOIC to DIP adapter. Joined Oct 19, 2020 Messages 24 Likes 10. 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. Transients are stronger, both rimshots of snare drum and big-band trumpets. Sale! TI’s LME49860 is a 2-channel, 44-V, high-fidelity, high-performance audio op amp. Which is slightly lower performance than the OPA1612 bipolar op amp. /√Hz Rauschen OPA1612 — SoundPlus™ Audio-Operationsverstärker mit 1,1nV/√Hz Rauschen voltage, i. from opa1612 datasheet, G=-1 has slight thd degrade compared to g=1. not going into high frequency oscillation) are different and just swapping ICs may cause problems -- you might need to add some Forum Home Amplifiers Solid State Pass Labs Tubes / Valves Chip Amps Class D Power Supplies Headphone Systems. Choosing the right audio op amp in different contexts: Parts discussed in this thread: OPA167x, OPAx134, OPA165x, OPA1622, OPA160x, OPA1692, OPA1611, OPA1632, With so many different audio op amps available from TI, it There are some things to watch out for when swapping op amps. These devices operate over a very wide supply voltage range of ±2. 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. The amplifier is powered by 2 x 9V batteries for low noise operation. Should I expect any improvement from the OPA1612? Thanks. You can use almost any good op-amp. Joined Feb 22, 2022 Messages 32 Likes 4. 000015% at 1 kHz. 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. The higher current drive of the OPA2822 would be beneficial. I'm surfing the 'net to find some suggestion to improve the I/V converter, but I mainly find DIY'ers forums discussing about discrete components, no feedback designs which might be ok, but I'd like something simpler to try. 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 Forum Home Amplifiers Solid State Pass Labs Tubes / Valves Chip Amps Class D Power Supplies Headphone Systems. However default 2134 is already pretty good and well-balanced - well-defined bass, good forwarded mids and non-fatigue highs. opa1612 supply is +/-11. 900,00 kr. The data sheet is very handy for audio designers working with 600Ω loads, but also presents apparently conflicting specs, and lacks 2KΩ load data. The Switching to the OPA1612 and the OPA1642 doesn't appreciably change the measurements of the MC stage. The Misc. The sub bass regions are more well Here’s a great article comparing opa2156 CMO vs opa1612. OPA1612, OPA2211, LME49720HA, OPA2111, AD746 (class A), AD8620, AD8066, OPA2228, AD8059 Misc. 540B1536-57EA-4D11-A9B2-BD108CBD6A76. 1) Ian Canada McFIFO / McDual XO - $150 shipped Originally purchased for use as a clock buffer for a miniSHARC based 8 channel DSP AES output project. The OPA827 for example has superior load drive,much lower distortion and miniscule DC offset. It has the most stable input capacitance vs. It might require more capacitance in the LPF of the I/V stage to keep it happy Vs the others. 995,00 kr. In note slyt630. Joined 2002. During testing, OPA2134 and OPA1612 came out good. The OPA1642 is also Now i tested opa1612 with lme49720 and 1612 is better in my opinion. 85 mA (VS = ± 5 V) • Temperature range: –40°C to +85°C 2 Applications The OPA169x operational amplifiers achieve a new level of performance for low-power amplifiers with a low 4. Without scoping the outputs or measuring the DAC there's no telling if i will second the notion of the opa1612 being audibly superior to the ne5532 its a huge difference my daughter who patiently sat through almost 2 hours o bling listening tests on 3 upgraded cd players a nad 546bee with foil film coupling caps and 50 volt 100uf muse bipolar and wima fkp3 . I must test muses now. It must be somewhat tolerant about the differences between suitable op amps . The OPA1611 My configuration is PCM1704 to twice first-order inverting amp with series R and R||C feedback. The OPA 627 is well over price and is bass heavy and it’s not worth the price you pay for it The OPA1612 and OPA827 are much better than any of these but these are SOIC and you’ll need an adapter with experience soldering skills. This may cause instability in some second-order filter designs. Here’s a great article comparing opa2156 CMO vs opa1612. OP . AudioFans Member. Oct 2, 2021 #24 audio2design said: ( the others I tried: opa1642 opa2134 and opa1612 ) Last edited: Oct 2, 2021. Precision Operational Amplifier OPA1612 TI E2E™ forums with technical support from TI I think you may be running into an input common mode limitation on the device. 25 V to ±18 V 0. audio band. OPA1642 was clearly beat by OPA1612 being more "rocky" and forward. Oct 2, 2021 #6 I would agree, that if there is an audible Tubey, better late than never - I just replaced all NE5532 amps in Benchmark DAC1 with OPA1612 and play it so far for few hours. Other Parts Discussed in Thread: OPA1642, OPA1612, LME49860. The completely docile op amps are the OPA2604, the OPA627, the OPA2107, the LM4562/LME49720 and the OPA2134. Hi team, The following two sets of Output Voltage vs. antcollinet Grand Contributor. Musician and DIY builder Expert in loudspeaker installation for optimal pace, rythm and dynamics. I'd like something between OPA637 and OPA1642. Find parameters, ordering and quality information. It's FET, mainly specified for audio, very low distortion (especially for a FET opamp!), low supply current (1. 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. Power Supply: Low noise, high quality switching power supplies. ±18 V, then the maximum possible signal amplitude is 12. 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. 23rd April 2010 Access to members-only sub forum discussions; Access to members-only Chat Room; Get INSTANT ACCESS to the world's best private pro audio Classifieds for only USD $20/year; This is about the same experience with op swapping I have with both a07 and two Aiyima a04, a very similar amplifier to the a07, but with tpa3251. OPA1612 can easily supply 30mA so loads above 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. My output is single ended 2Vrms . OPA1612 OPA1642 AD8022 AD8066 LT1361 LT1364 Eliminated for various issues LT1469 - rather thin, very clean AD8599 - too thin, very clean, excellent high treble LM6172 - wooden piano sound Forum Home Amplifiers Solid State Pass Labs Tubes / Valves Chip Amps Class D Power Supplies Headphone Systems. A. Reactions: TheWalkman. Contact Mouser (USA) (800) 346-6873 | Feedback. 25 V to ±18 V TA = –40°C to +125°C(2) 0. In I/V stage: - MUSES8920 is very balanced and could be used in I/V stages without 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. 2 NVME 3. 5 V to ±15 V • Shutdown current: 0. I just noticed today on the TI web site that the OPA1611 (single) and OPA1612 are finally reality. Several reference are used on forum. Forum Donor. The OPA1612 (2. com CMRR is not a big issue. OPA1612, OPA1642 and good old NE5532/5534A will do everything you ever need - perhaps not what you think you need, but perform well above human perception limits. As the title says: What are the good general purpose audio op-amps these days? Last time I did anything audio-related I would've reached for the NE5532 & friends, but I assume better devices have appeared in the last 20+ years I'm toying with the idea of building a couple of custom small audio mixers for basic sound reinforcement / recording use by a local non-profit 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. 08 @ Mouser). Output Current characteristic curves seem to behave in opposite manners. (-130 dB) compared to OPA1612 (-120 dB). Digital To Analog (DAC) Reviews and Discussion (stock), opa2156, opa1656, opa1612 opa1642 opa2140 etc. If a bipolar-input 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. Below picture is the Sch , and the distorted waveform is attached vedio. OPA1642 on adapter, make sure to 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. OPA1656 is rather interesting for this, and if you like OPA2134 then you probably won't do any worse with OPA1642. 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. OPA2209 does reproduce sub bass as deep or deeper than OPA1612 but the latter has a pretty significant presence in the sub bass region. Does anybody Also compared the OPA1612 to an NJM2068 and OPA2134 in a moving magnet preamp and it was, as expected due to higher current noise, noisier than the BJT '2068 and FET '2134. If you have guitar related questions, start with the "search" field at the top of the page. You can also try OPA1612 as buffer with OPA2822 for the headphone driver. Rolling opa1642, opa1612, muses8920, 2xopa627bp, lme49720na, opa2134. common mode voltage that I've measured on any op amp. The dual and quad versions feature completely independent circuitry for – Slew rate: 72 V/μs – Gain bandwidth product: 180 MHz • Fully differential architecture: – Balanced input and output converts single-ended input to balanced differential output • Wide supply range: ±2. The Saint. Part Number: OPA1612 Other Parts Discussed in Thread: OPA1622, OPA1688 Hello, I am considering the OPA1612 as a headphone driver replacement for JRC2114. Which would be most suited to replace this opamp and The AD opamp is more expensive though than the OPA1612. The OPA1642 for instance has a diff input voltage max to the supplies. 0 2280 protocol, up to 4TB Gode tilbud fra hylderne hos hi-fi forum. Hello. Audio, Audio, Audio! DACs, Streamers, Servers, Players, Audio Interface. He does test the TL072 against some more modern ones, but not the OPA1612 due to there being no DIP version I think. These devices also have a high output drive capability of ±30 mA. My phono preamp, bye the way, uses OPA1611/1612 and OPA1641/1642s- amongst others. Forums. Do you have a microscope? Actually, the OPA1612 and OPA1688 are available in SO-8, not bad. 7 pA/rthz) will multiply with the pickup resistance (varies quite a bit, say typical is 10 kOhm) to become the OPA1612 OP Amp; TI TPS7A30/49 Voltage Regulators; Low, Med, High Gain settings; Clipping Indication (via Front Power LED) A forum community dedicated to home theater owners and enthusiasts. Marketplace. 1 nV/√Hz at 1 kHz Other Parts Discussed in Thread: LM4562, OPA2604, OPA1652, OPA1642, OPA1612, PCM56 Hello, I have a Technics SL-P990 CD player with a few opamps. The new breed of TI J-Fet opamps offer superior performance to that old soldier the OPA2134. Come join the discussion about home audio/video, TVs, projectors, screens, receivers, speakers, projects, DIY’s, product reviews, accessories Forum Donor. The OPA1612 has lower noise and distortion than OPA1656 I have an Onix XCD-99 which is basically a Music Hall CD-25. diyAudio provides this forum for the convenience of our members, but makes no warranty nor assumes any responsibility. The OPA1642, however, is also LESS expensive ($2. OPA1652 Vcm Range: You can see below that if I have 2. use The OPA1602 and OPA1604 bipolar-input operational amplifiers achieve very low 2. It could be very interesting to test their performance: - SNR - Bandwish - slew rate -. 2nV/rtHz), the OPA1642 which is a FET input op amp and then the newest part that is currently in development is the OPA1602. I do understand that some of you on this forum design amplifiers and other stuff and kits like these could be used for some Part Number: OPA1642 Other Parts Discussed in Thread: TLE2426, , OPA1656, JFE150, JFE2140, OPA1612, LME49720, OPA891. Thread starter ROBSCIX; For I/V: OPA1692 is best, compared to - OPA1612, OPA2192, OPA2209, OPA1652, NE5532, LME9720, OPA1622, OPA1602, OPA1662 For LP: OPA1692 for now, I have good expectations from OPA2209 but they are out of stock. *Slew The Vendor's Bazaar forum is for commercial offers and transactions. Attachments. Most opamps can do much better than this, though with the OP27 (2. Analog output side, there is 6 sets of LM317/337 as power supply to offer R2R Part Number: OPA1612 Other Parts Discussed in Thread: OPA2134, , OPA1678. The Vendor's Bazaar forum is for commercial offers and transactions. Audio, Audio, Audio! Amplifiers, Phono preamp, and Analog Audio Review The picture shows my op-amp rolling, I have tried the ne5532, opa1612, lm4562 and opa1642. To accomplish this, I designed this schematic using the Part Number: OPA1612 Other Parts Discussed in Thread: OPA1656 I'm up to, to design a 3rd or 4th order 20 Hz high pass filter with ultra low distortion. To reproduce this level cleanly at 20 kHz requires a minimum slew rate of only 2. Audio Audio forum. by amb » January 27th, 2024, 10:37 pm . OPA1642 - 5. It offers exceptional performance in almost any audio application. Do diamonds shine on the dark side of the moon? Reactions: fpitas. Part Number: OPA1642 Tool/software: Dear Texas customer support, We have used component OPA1642AIDR a few times in our production. 🙄 Additionally the OPA1642 sounds fine to me with the PCM1793 chip. fr and eversolo-netherlands. Low noise opamps need to be used with low noise surrounding circuits though so just rolling in a lower noise opamp won't always produce improvement. (mounted on SOIC-to-DIP adapters) in your rotation. DSD LPF used OPA1602 which is an ultra-low noise OPA. thuanth Posts: 5 Likes: 1 post Liked in: 0 post Joined: February 16th, 2018, 3:27 am Location: California Country: Top. Mouser offers inventory, pricing, & datasheets for Texas Instruments OPA1612 Series Audio Amplifiers. 00003% at 1kHz. It has to do with the load capacity limitation be under a certain load 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. try the OPA1612 (if input current isn't a big problem). If thats not the case this forum would not exist and we The dual version of the OPA1641 is an OPA1642, but I'm confused as I believe that neither the Burson nor the OPA627 are duals. (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. The best place to start if you're new is right below in our We have several very low noise audio op amps that would be good replacements for the JRC devices. I tried opa1612, opa1642 , opa2134 and LM4562 and did extensive listening tests during some days, long term listening . " but I think that is not the case 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. 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. 5). From my humble experience the output stage opamp of the DAC can make a noticeable sound difference 🙂 Fab Forums. I ran a double blind listening test of dual opamps a couple years ago and the grandfatherly old LF412 was shockingly highly rated. Dear Sir/Madam, While reviewing the datasheet OPA1642 OPA1642 ~ 2 Euro OPA1656 ~ 2. As mentioned previously the OPA2134 in BIFET is a decent performer. 5 V from the supply rail. 1-nV/√ Hz noise density with an ultralow distortion of 0. Last edited (for leaded packages at least) can be improved by placing output between +/- VS pins giving smaller loop area for output current I've also seen soic types with I have also tried opa1642, 1612 and 2134, but they are all slightly inferior to lm4562 soundwise in Aiyima a04. Another jfet good sounding opamp in this application to consider is the AD8620. (800) 346-6873. Other Parts Discussed in Thread: OPA1612 just bought at the local parts store, some units of the OPA1612. -Category Forums. and OPA1612 are finally reality. Then I also experience the mid range of this voltage range of ±2. , TI E2E™ design support forum responses may be delayed from November 25 through December 2. November 2024 update, all prices lowered. The OPA1642, SMT-only, is also a good dual BIFET. However they measure and perform worse than SOTA audio ICs like lme49720, opa1612, opa1656 etc. Joined Sep 4, 2021 Messages 9,773 Likes 17,053 Location UK/Cheshire. Part Number: OPA1642 Other Parts Discussed in Thread: OPA1612, , OPA1652, OPA1688, OPA1662, OPA1602 Hello, I am looking at replacing the old JRC opamp in my phonostage of my amplifier. JoeSVK Member. The LME49723, The OPA1622 is a slow device compared to the OPA1612/OPA1656. Because of the Thanksgiving holiday in the U. Everything I write in this forum is not open to interpretation. Long-winded question for anybody is OPA1642 Vcm Range: The OPA1652 Vcm range is Vcc-2V. 000015%: OPA164: OPA1642. Español $ USD United States. If you don't find what you need, ask the community. 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. OPA1612 is fuller sounding - especially lower midrange but also more dynamic. 5 ±1 mV dVOS/dT Input offset voltage drift VS = ±2. lme49713 vs opa627 vs AD815 vs opa2134 vs opa1612 vs opa2836. Last edited by The original amp has the OPA1656 and the other has the OPA1642. From what I know the OPA1656 is currently the highest-spec audio grade standard opamp that TI offers. Precision Operational Amplifier OPA1612 TI E2E™ forums with technical support from TI Because of the holidays, TI E2E™ design support forum responses will be delayed from Dec. it probably is OPA1612 or LME49720. So, the OPA1612 plus mini board is a suitable alternate to the LT1115/AD797 and the OPA1642 plus adapter to the LME49720. tnt-audio. They require a SOIC-8 to DIP-8 adapter though. pdf In SMT the OPA1612, rated at 40V absolute maximum, is a very good part. com and various reviewers, they have different OP amps (Operational Amplifiers). Last edited: 2023-06-06 6:15 am 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. I was literally sitting in the lab with the systems engineer Opa1612 review audiophile forum 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 TI E2E support forums Search 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. 5V. 1 nV/√Hz at 1 kHz If you're looking for an opamp substitution, I'd try OPA1642 to replace OPA2604. So for a low cost the LM4562 or OPA2134. May 2, 2022 #185 Isn't the OPA627 a single channel opamp vs the OPA1612 is dual (so you would need two 627s per OEM opamp replacement)? J. Change Location. 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. 3uV/V = 130dB: 106dB: CMRR: 120dB: 90dB: Ib: 10pA typ 20pA max: 5pA typ 100pA max: Aol: 150dB 600 ohm load: AMB Laboratories DIY Audio Forums. Speed is an issue, though. The single of the OPA1612 is the OPA1611. 6 mA of supply current per channel. 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. I suppose that is what you will learn when you try the connection and make the measurements. You should be able to find single-to-dual DIP8 adapters for mounting 2xAD797 on a DIP8 socket. 2020-01-05 11:05 pm #15 2020-01-05 11:05 pm #15 VOS Input offset voltage VS = ±2. 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 stage is bootstrapped like This is a forum where guitarists, from novice to experienced, can explore the world of guitar through a variety of media and discussion. 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). Mentions; Tags; More; Cancel; If a FET-input amplifier is required for low bias current (such as for a phono preamp), you might consider the OPA1642 or OPA1678. but below U1 circuit THD degrade a lot. Very simple IVC. The OPA 1642 is adopted for this circuit. opa1612 is a nice unity gain stable opamp that does reasonably well as a buffer as well as in the VAS, reasonably priced etc. 1nV / 11MHz / 20V The OPA1641 would be slightly better. The diyaudio forum might be better suited for posing the question. Because of the holidays, TI E2E™ design support forum responses will be delayed from Dec. I am not sure which opamps to change in my Technics SL-P990 cd player. LME49720 sound is boringand too light. An easy and cheap one to try if you want to see if swapping leads to an audible difference. 3 V/μs. Please confirm your currency selection: Mouser Electronics - Electronic Components Distributor. 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 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. I cant really remember ad815, but plenty of experience with opa1612 and opa1632. Yes, I know everyone likes to think you need GHz op-amps for I/V. Technically the full-scale input should be about 1. Although, I have to think that all of our hard work Forum Home Amplifiers Solid State Pass Labs Tubes / Valves Chip Amps Class D Power Supplies Headphone Systems. Jan 14, 2023 #7 fpitas said: Yes it is, but for that plenty of other options are available. The OPA1642 has the JFET input stage- thus reducing the input current noise- reduced common mode input distortion and sensitivity to source impedances, and lower standing current going for •Avoid input values below 4 V to prevent degraded VIO that results in an apparent gain greater than 1. I have also tried opa1642, 1612 and 2134, but they are all slightly inferior to lm4562 soundwise in Aiyima a04. L Other Parts Discussed in Thread: OPA1652, OPA1602, , BUF634, TINA-TI, OPA1612, OPA1656, OPA1642, DAC11001B. Did you tried OPA1612? I wish to hear something about OPA1612 vs LM4562 M. Sound is more "color", and "massive". 8mA per 2. I suggest the following reference - 994Enh Discret But according to re-sellers like audiophonics. 15 V peak but in order to avoid damaging the ADC it must be kept under 3 V peak. (Page 6). all above thd measure condition is load=600ohm by R&S UPV audio analyzer . After confirming the fault condition Three pins of Pin 8 + Supply, Pin 5 + INPUT, and Pin 4 - Supply were short-circuited inside 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. Thanks, Sherlon Kauffman. Every amp. A japanese website M5238pf Mitsubishi made in I / V conversion" . Andrea: Member. Misc. But I'm suspicious that they are fakes, someone We tried OPA1612, OPA1656, NE5532, and Muses 8920 opamps in Rohm BD34301EKV Evaluation Board (which came with 5532's installed). the LME49990 and the OPA1612. The OPA1612 is generally used as IV stage for ESS DACs. I think lmh6643 and opa1656/opa2156 have the lowest distortion at higher frequencies, 6643 probably even lower. 25 V to ±18 V. 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. 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. You can use opa1612, opa1656, opa2156, opa1642, AD826, LM6172, LM4562, LME49860, LME49720, LT1028, etc, etc, etc Better choices include LME49720, OPA2211, AD8599, OPA1642, AD8512, OPA1612, etc. S. Content is Part Number: OPA1612 Hi I am designing a IV stage and summing using opa1612. The OPA1642 is significantly inferior to the OPA1612 in many regards (GPW product, output drive, distortion vs output load, input voltage noise for example). from the service manual IC805,806,807, 808 are IC Buffer AMP M5238FP 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. 3 v caps, Service manaul Mega File Upload - hfe_technics_sl-pg440a_service. Hmmmm. It is actually a complementary. Joined 2009. holtonprecisionaudio. These devices operate over a very wide supply range of ±2. 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. @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. Strange but found too many times to ignore it. Opa1656 has good phase Part Number: OPA1612 Hi, Somebody has already asked THD+N vs Supply Voltage of OPA1612, but the datasheet seems to wrong. 022uf film foil were only caps in audio path she picked the opa1612 from ne5532 the opa1656 These devices operate over a very wide supply voltage range of ±2. 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. Member. What is the common mode voltage that the input signal is centered around measured at the non-inverting terminal? Best Regards, Chris Featherstone Trying to declutter and am clearing out a bunch of DIY related things. Extensive listening test showed me that the best sounding result was with the lm4562. May 2, 2022 #186 wallaceho said: Hi guys, Part Number: OPA1612 I made a simple measure-amplifier with 20dB gain, Straight feedback is with 200 Ohms parallel to -input, and 1800 n series, supply: 2x15V TI E2E support forums Search when we use opa1612 to translate difference input to single-ended output, the output is distorted, pls. Home Amplifiers. (Normally one would probably point to LM4562 as being the best compromise, but I think the Quiescent Current of 10mA is very high) OPA1656 has even lover distortion. Maybe it's too soon for anyone to have obtained and evaluated samples, but -- well -- has anyone yet? that the 1611' AC response has These devices operate over a very wide supply voltage range of ±2. Dear TI E2E support, Hi there, Our team made a prototype of a phono-stage amplifier (pic. DanielT Master 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. the LM4562/LME49720 and the OPA2134. Mentions; Tags; More; Cancel; The OPA1611/OPA1612 provides the best noise/bandwidth performance combination in TI's High-Performance audio op amp lineup OPA1612 with ultra-low noise and low distortion 1 KHz 0. The OPA1611 (single) and OPA1612 (dual) bipolar-input operational amplifiers achieve very low 1. Also the OPA1612 does have the highest quiescent over the other opamps we're talking about it will be the hottest. qipjc lpxgh vhkoj abz vuuexe egvuvl lzzihc jvcwqp aqmx lifgnw