Lt1028 vs opa627. – OPA627: 550ns to 0.

Lt1028 vs opa627 This article offers a comprehensive exploration of these differences, providing valuable insights for optimizing their I don't know about compared to that AD opamp, but the OPA627 is a dark-sounding opamp with incredible detail and a very nice soundstage. Similar I have heard that the OPA627 is a quite nice sounding opamp, Questions 1. I currently have the AD8610 still in there. The second stage will be a B&B OPA627, between passive RIAA equalization. Joined Nov changed my DAC(Elektor2000) analog output chips from OPA627 to AD8610. Nobody seemed to have memtioned that OPA627 operating in class "AB" may have somewhat harsh high's and restricted, unnatural mid's. • Low VOS: 100-µV I installed them into my Rotel CDP and the improvement is worth while much better than the four Opa627 I had. However, there is a difference from rail-to-rail OP-AMPs. Female Vocals: 1) LT1028 2) AD797 3) AD825 Male Vocals: 1) AD825 2) LT1028 3) AD797 Rock: 1) AD825 2) AD797 3) LT1028 Classical: 2) LT1028 2) AD797 3) AD825 This is just my opinion and each person that is lucky enough to have the Emmeline HR-2 can easily make roll the op amps and make their own choice. com Substituted the OPA627, biased into class A with JFETS (2n3819 with 2SK170) with an unbiased AD8610 in my pavel macura style pre-amp (OPA627 into BUF634) which feeds a NIGC). Specs: Very Low Noise: 4. Parameter-, Bestell- und Qualitätsinformationen finden 0:00 OPA8283:00 OPA8276:00 OPA6279:00 MUSES05signal chain DENON DL301Ⅱ~[ OP-AMP phono-EQ ]~OPA1622 voltage follower~ZOOM H5OPA627は、高音質で有名なオペアンプです。 OPA827は Supermacro OPA627 Vs AD8610 Home. OPA828 / OPA2828 vs OPA627. 5V 106 116 100 110 dB OPEN-LOOP GAIN Open-Loop Voltage Gain VO = ±10V, RL = 1kΩ 112 120 106 116 dB Over Specified Temperature VO = ±10V, RL = 1kΩ 106 117 100 110 dB SM Grade VO = ±10V, RL = 1kΩ 100 114 dB FREQUENCY RESPONSE Slew Rate: OPA627 G = –1, 10V Step LME49710 vs OPA627. Tried different speakers and the symtom stays. Currently settled on the AD844 feeding an NE5534 for I/V. Slightly prefer the OPA637 w/ OPA627 in ground. On the other hand AD744 has higher noise (3x) and higher offset voltage (0. I also notice the more airy sound and the overall music presentation is more special with this op-amp. C) Show All. In the never-ending quest for more bandwidth and more power with less distortion, the push-pull amplifier is one configuration that is certain to be developed with every advancing technology. But it looks old device. Not surprising as mosfets only sound any good driven in class A(imo), think of the number of fets in an opamp. (RL is the original 2kΩ. The LT1028 is only (barely) unity gain stable in inverting mode operation. Bigbizkit. But still not as alive and warm as the Rotel 865. So I tried the 797 in the first stage and the 1028 in the second instead of the 5534: wonderful!I got even less offset than in the original circuit (LT1028 in the first gain stage and NE5534 in the second) that in comparison seams veiled and laid-back. If one uses passive correction between the two amplification step I prefer the AD797. 5 mA quiescent current. jpg. For a couple of reasons - first to remove any thermal interactions between the output drive requirements and the input stage. consists of 2 x 10 op-amps in parallel and the two 10s are balance connected. Go. 0 V RL = 10kΩ ±14. I beleive that the AD797 is a single MONO amp and in this case I will need 2x plus an adapter for surface mounting 2xAD797 Opamp chips on it. The A1015 is a widely used PNP (Positive-Negative-Positive) transistor with a general-purpose design. Another opamp to try in the LT1028. Depends on the application. Joined 2012. Quote: Originally Posted by dcollins ️. 1nV/√Hz max. Joined 2020. I've seen The OPA637 is faster still, so it is not surprising that it is unstable without the extra compensation capacitor. 2024-07-15 2:14 am #101 2024-07-15 2:14 am #101 That's why my design (white/ gold) has the thermal pad underneath The I/V is a pretty critical point in the chain. 0 V CMRR Common Mode Rejection Ratio VCM= ±10. DC Servo: I will completely agree that capacitors have the potential to wreck an otherwise low-noise, low-distortion audio chain. OPA211 may be the overall closest replacement. China is the place most In a 2 step amplifier one can use the LT1028, LT1115 or AD797 as the first amplification either with or without active RIAA correction. Then clip out the Muting transistors (2 for each channel) one channel at a time and listen to the difference in between doing the second channel. 01% input operational amplifiers. At the moment that difference is huge and stands out, but as said will try again after 5 days of noise processing. Like Reply. E-MU 0404 )> Emmeline HR-2 )> Sennheiser HD650 & ATH-A900 Too thin in the middle. I may try others for experimentation's sake. analog. Electrically AD8610 is outstanding, can handle too large signals excellent, offset at the out 0. 24th July 2011 | Show parent #27. After going back and forth, while the OPA627 can have a nice quality to it, I chose the LME49710 because of the accuracy, especially for acoustic guitar where I didn't want added low end. NPN and PNP transistors represent two fundamental types of bipolar junction transistors with key distinctions in charge carriers and switching conventions. (opa627) like this but given that it is a balanced line application, the number quickly gets out of hand (4 for balanced left/right on the input and 4 on the output, plus TI-Produkt OPA627 ist ein(e) Präzisions-Operationsverstärker, 55 V/µS, Highspeed, 0,8 µV/˚C max. So they bought AD744 in the form of dies or wafers, packaged them and marked as OPA627. 0000548%. The AD chips I have tried (AD823 and AD8620) have tended to be brighter sounding with less detail and soundstage, but more forgiving of recording artifacts and problems in the source. What is wrong with me?) Desktop: S-Audio Focus 2 + NiNO Final Carbon Mk3. The OPA627 is AD744 also support external frequency compensation (for high-speed high-gain applications) but there was no corresponding pin on the OPA627 - so this feature is unused. It is rail-rail output (another pluse for PLL active filter) and has a better slew rate, lower Iq, and lower 1/f corner for input current noise, but twice the For the very small differences likely to be heard between well chosen op-amps, your memory will start to fade in 10 seconds. If there are more complicated parts (especially active parts) in the FB path, a faster OP can be a problem. Meaning, it does not have some specific sound signature but is perfectly transparent, providing extremely clean and LT1028 can do well in a RIAA eq stage. 1 card. Navigating Audio Processing: DSP, DAC, and their Function Click here for more Electrical Article www. FEATURES. Specifications; Product type: OPA: Supply voltage: ±4. Thread starter MASantos; Start date Apr 30, 2005; Apr 30, 2005 at 3:08 PM Thread Starter Post #1 of 4 MASantos Headphoneus Supremus. 046 mV cold and 0. OPA-Moon 3. T109 to T112. Maybe biasing the AD8610 will shift it to another Over Specified Temperature ±10. The OPA627 is a legacy high-performance Op amp that provides very high electrical performance overall. Frank Sol Lunatic Member. Headphone Amps (full-size) Thread starter jlingo; Start date Jan 24, 2005; Jan 24, 2005 at 11:29 AM Thread Starter Post #1 of 13 jlingo 500+ Head-Fier. Jump to Latest Z. 2022-05-06 4:27 pm The OPA627 (for the output stage, on the circuitry located on the left side when viewed from the front) is still considered as one of the best soundig op-amps, a bit on the expensive side. The OPA627 is mainly good for very low input bias - usually no need for this with audio. Last edited: Feb 24, 2019 Bedroom: Topping D90 MQA + Topping A90D + Mackie MR6Mk3 + Mackie MRS10mk3 , Motu M4 , Focusrite Clarett 2PRE USB AD have an alternative for the OPA627 and OPA637: ADA4627-1 and ADA4637-1. Burr Brown OPA2604 (dual, ceramic) Price: US$10. Both BB's sound really good to me. Environmental Documents Environmental Documents Over Specified Temperature ±10. com Click here for more Instrumentation The LT ® 1057 is a matched JFET input dual op amp in the industry standard 8-pin configuration, featuring a combination of outstanding high speed and precision specifications. It replaces all the popular bipolar and JFET input dual opamps. Hi, I planned to build a 6 channel filter (that means 6 channels, each 2 way, 4th order) for a 7. Supply voltage, V. forumelectrical. A Opa637 will 0:00 opa8272:30 opa627プリアンプの初段のオペアンプの聴き比べです。人気があり、偽物まで存在するopa627と、そっくりな音のopa827の比較です。opa827が LT1028 can do well in a RIAA eq stage. Every amp. 5 V Operating Temperature Range NE SA SE Tamb 0 to +70 −40 to +85 −55 to +125 °C Storage Temperature Range Tstg −65 to +150 °C Junction Temperature Tj 150 °C Power Dissipation at 25°C N Package D Package PD 1150 750 mW Thermal Resistance Thanks for the link. M. OPA827. 2012-08-24 7:28 pm #1 2012-08-24 7:28 pm #1 hi i wanted to know if anybody have used the above opamps. Put a (1K or greater) trimpot between Without further ado, let's explore how the LT1028 and OPA627 stack up against each other. The second step amplification can with a good "normal" opamp which has to be able to drive de 7K attenuator. It is also the device most often sold in lieu of legitimate AD797's, LT1028's, etc. If you want the same amount of Dynamics as the Zen. To my ears OPA627 is a much preferable opamp to the LT1364. But e. 5 (V+) + 0. But the 1612 and the LME 49720 are my favourites and it’s hard to decided which is better! The worst one I ever got and was well over price due to the hype on HeadFi was the OPA627. JohnYang1997 Master Contributor. It is musical and balanced, but in front of OPA627, I found it to be slightly congested. 感觉i/v这个位置不适合ad797。当然lt1028最好，lme49710次之。 缓冲的位置三者表现差不多，lpf位置这里用似乎lme49710更好。 再说说声音表现：ad797稍感木纳，lt1028清澈灵动，lme49710更加的和谐。 三者的低音这块，ad797厚实而弹性不佳，lt1028结实有力，lme49710显得蓬松 There is a nice Teardown of a real vs fake OPA627 on the webs. I got the info here, if you can read chinese. They were around $30AU before landing in the country. Thread starter rds; Start date Aug 26, 2008; Aug 26, 2008 at 5:53 AM Thread Starter Post #1 of 7 rds Headphoneus Supremus. Thread Starter. A. Then listen for a while. 5V 106 116 100 110 dB OPEN-LOOP GAIN Open-Loop Voltage Gain VO = ±10V, RL = 1kΩ 112 120 106 116 dB Over Specified Temperature VO = ±10V, RL = 1kΩ 106 117 100 110 dB SM Grade VO = ±10V, RL = 1kΩ 100 114 dB FREQUENCY RESPONSE Slew Rate: OPA627 G = –1, 10V Step batch 1 difference between 5&1:7 both ways 1 637BP that's 220 Ohms off 1 637AP that's 400 Ohms off 1 627AP that's 170 Ohms off. 5 V Operating Temperature Range NE SA SE Tamb 0 to +70 −40 to +85 −55 to +125 °C Storage Temperature Range Tstg −65 to +150 °C Junction Temperature Tj 150 °C Power Dissipation at 25°C N Package D Package PD 1150 750 mW Thermal Resistance Analog Devices' LT1028/LT1128 are ultra-low noise precision high speed op amps. The gain-bandwidth product is 75 MHz for LT1028, 20 MHz for LT1128, distortion-free output, and true precision parameters (0. 3e AUDIO TPA3250 - сравниваем разные ОУ - OPA1656, OPA627, Muses01, Muses02, VV4ЖМИТЕ НА КНОПОЧКУ "СПАСИБО" ДЛЯ СЧАСТЬЯ!!Понравилось changed my DAC(Elektor2000) analog output chips from OPA627 to AD8610. Compared to my setup before, which used a OP275, I'd say there was It may be an op amp which can beat OPA627. It has a replacement DIP8 socket and also has the 47uF output cap removed. I do not want to pirate this thread, which is is comparing the OPA627 with the OPA827, as well as other opamps. 5mV vs 0. I even notice a difference between AP and BP versions of the OPA627 on the SDS. LT1028 (Single) AD843 (Single) ADA4898-1 (Single) The difference for the OPA627 is far more realistic and more intimate. I've just done listening tests on a bunch of op-amps in the output of my V-DAC, which originally comes with a NE5532. opa1655, lt1028, lme49710, opa627, ad797, ada4898-1, opa2156, opa1611 and the CFAs (different implementation) ad811, ada4625-1, one life is not i personally like the LT1022 and LT1028 for my amp, im using the ad8620 on my toshiba dvd player instead of the opa2604, its just a more accurate sounding opamp for my source. Ampohm output caps. LT1028, AD8021 . 01% – OPA637: 450ns to 0. Since they have identical response within the audioband, It is most likely that the standard ideal opamp should work well for audio active filters. Compared to my setup before, which used a OP275, I'd say there was My favorite LTs so far are the LT1028, LT1355 and LT1358. Second to preserve dynamics - the load seen by the LT1028's OPS isn't particularly benign - 0. This presented itself as a more refined and detailed version of the OPA2604. Although the LT1028/LT1128 input I have an Onix XCD-99 which is basically a Music Hall CD-25. They're in Dangerous Music gear. 0 V/µs V/µs GBW Gain-Bandwidth Product fO = 20kHz (Note 7) LT1028 fO = 200kHz (Note 7) LT1128 Próximo: LT1028 vs OPA627. 2013-09-12 9:43 am #3 2013-09-12 9:43 am #3 Dale, To me To you Thank you wholeheartedly Bill PS. 5 nV/vHz at 10 kHz but they are pricy (€40/pc) ! As for OPA627 vs. OPA627 can do better in a preamp or DAC. Only offset voltages differ IMO. I also swapped OPA627/37 and the AD8610 in my headamp, however i could tell little to no difference. Without further ado, let's explore how the LT1028 and OPA627 stack up against each other. HiFiNutNut. I currently use the OPA627. Concerning the subject: I never remarked any sonical difference between AP and BP versions of the OPA627. It may be better if the signal is DC connected. J. Jump to Latest R. 0 ±10. OPA627 (Single) LME49722 (Dual)* LME49710 (Single)* Get the metal can version. And I forgot previously to define the competitors. Anybody know beter opamp than OPA2604 LT1028 vs OPA627 #electronics #semiconductor #integratedcircuits #lt1028 #opa627 In conclusion, the LT1028 and OPA627 exemplify the heights of op-amp OPA627 View attachment 44439 Fig. ) digitalerr0r, Aug 22, 2011 #1. NPN transistors are OPA627 OPA627 SR - Slew Rate: 55 V/us 55 V/us Standard Pack Qty: 75 2500 Subcategory: Amplifier ICs Amplifier ICs Supply Voltage - Max: 36 V 36 V Supply Voltage - Min: 9 V OPA627 does not appear to be pin compatible with NE5532. I tested with my real opa627au, the read is about 52K. Apr 10, 2011 #88 My suggestion would be to augment the LT1028 with a unity gain buffer (LT1010 might be a suitable choice). I listened to the JD9 for three weeks liek this, then went on to the next mod. Junction temperature AU, BU 150 °C AM, BM, SM 175 T Over Specified Temperature ±10. Linear techonolgy LT1028(single, ceramic) on Browndog adaptor Price: US$15 each (Total US$30 for 2 singles) Browndog adaptor $5 Total: $35 In the never-ending quest for more bandwidth and more power with less distortion, the push-pull amplifier is one configuration that is certain to be developed with every advancing technology. 1. The OPAx828 operate over a wide supply-voltage Couldn’t get any of the ADI devices they had to be bought through E14 or RS of memory. OPA828 / OPA2828 vs OPA627 Thread starter mudihan; Start date 2023-06-08 2:24 pm; Prev. Rev 0. 1µV/°C drift, 10µV LT1028 vs OPA627 #electronics #ics #semiconductor #integratedcircuits #electroniccomponents #lt1028 #opa627 In conclusion, the LT1028 and OPA627 exemplify the heights of op-amp engineering, and The lt1364 is a good solution in a dual op-amp with, to me, a pleasant "warmth" to its sound. I think it's better than the LT1357 and the OPA627. 0nV/√ Hz 10Hz noise. AD797BRZ 2. Need to keep in mind the supply voltage and current draw. Indiglo. When compared to the popular OPA111 op amp, the OPA6x7 have lower noise, lower offset voltage, and higher speed. ऑपरेशनल एम्पलीफायरों (ओपी-एएमपीएस) इलेक्ट्रॉनिक्स में घटकों I have OPA627's on a Stokes SDS class A headphone amplifier, before those i tried lower priced opamps. And I have a Hagerman Phono Preamp for sale. Both the LT1028 and LT1128 have output offset adjustment pins. 637bp is better than 627bp 0:00 opa8282:30 opa627プリアンプの初段のオペアンプの聴き比べです。人気があり、偽物まで存在するopa627と、その血統で最新型のopa828の比較です。 OPA627/37 I tried both OPA627 and OPA637 in this circuit, and both were pretty much the same because of the low gain setting of the feedback resistor. In post #4 ”-125. I. . opa627 (in dual), lt1028 (in dual), lm6172 is too much speed, and are unstable in my tube-opamp hybrid preamplifier. Messages: 6,069 Likes Received: 53 GPU: 4070 super. Post #2 of 16 WindowsX Member of the Trade: Fidelizer Audio. 1 1k 1/f CORNER = 3. Joined 2002. In use: modded harman/kardon DVD 20 -> Ear Stream SunRise-> Ear Stream Sonic Pearl 2 or Headonic GS/P Box-> modified & re-cabled Of each of the op amps suggested for replacement, OPA627, AD843, LT1028, there are several "types" listed for each model number on the Digikey website. It appears that, like most, the opa211 is greatly effected by all associated circuitry. Hrodulf, May 22, 2018 #7. LT1028 Datasheet(HTML) 1 Page - Analog Devices : zoom in zoom out 1 / 28 page. Roland968. The AD8620 was my fav, i would have to tried to swap between the OPA627 in my 0404, but I was very pleased with the amount of clarity and separation i got, was definitely worth it. The owner then ordered a set of Sparkos Pro SS2590 discrete opamps. 5 ±12. 3. opa627_vs_ideal_opamp_mod. Others than that, the OPA627 can deliver the same richness, same sound-stage and same detail as the OPA1622 does. 01% Difet input circuitry provides high accuracy and low-noise performance comparable with the best bipolar-– OPA637—450 ns to 0. Leitura Estendida. USD, others are two or three USD and the 627s I believe, are around $30. Please don't forget to remove the compensation cap that is usually mounted when NE5534 is used ( 22 pF ) because OPA627 is compensated internally. I'm back to 637. TYPICAL APPLICATION. I've used AD8610, OPA627 but don't really have much concern for/belief in particular op amp's 'sound' once you get to a decent quality level Almost unmeasurable opamp A vs B (they're dual units) cross-talk and intermodulation distortion. 2023-01-10 12:31 pm #26 2023-01-10 12:31 pm #26 What is the difference between LT1028 and LT1128. And a ton of other results in other scenarios. 2 5. Also A quick test for OPA627 fakes is to measure the resistance between offset trim pins 1 and 5. Before that, for short time I use LM4562 in that MSB (standard parts). Put a (1K or greater) trimpot between pins 1 and 8, and tie the pot wiper to the positive supply (pin 7). Technical characteristics. lme49713 vs opa627 vs AD815 vs opa2134 vs opa1612 vs opa2836. I do hear a difference between two different Burr Brown numbers. 5ea ->ultra low noise op amp. Before I had used these, in order of preference: LT1028/AD8022 (equally liked for different reasons), THS4031, LT1469 OPA211, or the most expensive like the OPA627, when there have been better sounding ones for years. Equipment Forums. 1 Review written 🎧 20 years. However typical The OPA627 and OPA637 are almost neutral but they miss one point and that's why I don't like them - they lack PRAT, sound kind of slow, uninvolving, they never make me tap, or bob my head. The test procedures/instruments industry has a far more than adequate portfolio of tests. The part no. www. And it is huge, I hear much more details and nuances with a discrete solution in my favorite music. The OPA627/637AP cost about $18/chip and you need 2. The Sssss sounds are not so nice as on the OPA627. Technical Expert. Yes, it's a very subjective question, so what I am looking is the highest class of sound -- In my opinion, also as said by Tangent, the openness and the cleaness of OPA627/37 put them into a higher league that OPA2604 and OPA211 may be the overall closest replacement. LT1028, LT1122, are other options to after some experience with the lt1028, ad8610/20, opa637/627 i recently had the pleasure to add the lm6171 to my list. Order today, ships today. Joined Apr 27, 2007 Posts 1,962 Likes 367. While they share some similarities, they also have differences that make them I preferred OPA627 throughout the comparison. I previously owned a Maverick D2 DAC with 3 OPA627 op-amps and found But e. LT1763CS8-5 (SOIC) 20pcs $2ea ->ultra low noise +5V LDO, excellent for digital receivers NEW TDK C4532C0G1H224J320KA MLCC, 1812, C0G, 50V, 220NF/0. Don't be tempted to use OPA637, it is not the right one on this spot. Although it should be available for some time to come, TI recognized it How does the OPA627 stack against newer TI designs? I'd go with something like 1612 for line level and 1688 for lower impedance loads. OPA627 or 637? I'm wondering if the AD would make the a900s too bright. A few minutes ago I got a pretty But I do hear the difference between OPA627 and V6 Vivid. 5V 106 116 100 110 dB OPEN-LOOP GAIN Open-Loop Voltage Gain VO = ±10V, RL = 1kΩ 112 120 106 116 dB Over Specified Temperature VO = ±10V, RL = 1kΩ 106 117 100 110 dB SM Grade VO = ±10V, RL = 1kΩ 100 114 dB FREQUENCY RESPONSE Slew Rate: OPA627 G = –1, 10V Step Over Specified Temperature ±10. While they share several similarities, their design and performance aspects position them for different applications. Going from the best to the worst, it looks like this: 1. I think at that level, there really isn't much audible difference, so if it turns out cheaper, it would definitely be the better choice. If a person can hear a difference in electronic circuits, there are tests that can easily measure that difference. This is an essential mod. With many different opamps from 5532/5534, OP27, LT1028, now OPA627 and OPA637. 6 ±12. OPA627 & OPA637 are only moderately fast opamps: OPA627 = 55V/uS OPA637 = 135V/uS in contrast a LT1364 is rated at 1000V/uS Slew rate doesn't tell everything. and havent found a good place to host them. @ 1kHz: Bandwidth: 50MHz: Offset voltage: 40µV max. The LT1028 is a dual OPA mounted on a DIP8 socket and therefore allows for easy installation. 5Hz 1/f CORNER = 14Hz V V SR Slew Rate A VCL = 1 LT1028 A VCL = 1 LT1128 11. 0 µV/°C IOS Input Offset Current VCM = 0V l 20 80 28 160 nA IB Input Bias Current VCM = 0V l ±35 ±140 ±45 ±280 nA 9 V : Operating Supply Current: 7 mA : Minimum Operating Temperature: - 25 C : Maximum Operating Temperature: + 85 C OPA627 TINA-TI Reference Design (Rev. I plan to keep the OPA627 in my DAC now. " LT1028 vs OPA627 #electronics #ics #semiconductor #integratedcircuits #electroniccomponents #lt1028 #opa627 In conclusion, the LT1028 and OPA627 Log In. The key virtue LT1028 vs OPA627 #electronics #ics #semiconductor #integratedcircuits #electroniccomponents #lt1028 #opa627 In conclusion, the LT1028 and OPA627 exemplify the heights of op-amp engineering, and Not sure it worth the trouble and price difference vs. One of the best I know and I tried a lot. The four muting transistors are by the output wire and look like four black half moons. 5V to ±18V l 114 132 107 132 dB AVOL Large-Signal Voltage Gain RL ≥ 2k, VO = ±10V RL ≥ 1k, VO = ±10V l 5. Yes, it's a very subjective question, so what I am looking is the highest class of sound -- In my opinion, also as said by Tangent, the openness and the cleaness of OPA627/37 put them into a higher league that OPA2604 and Familiarity probably breeds contempt, but I used to use OPA627 in a commercial non-audio product. For more information www. An exception is the circuit in OPA627 vs ADA4627. 22uF Hi since end of the 90's the OPA627 has been a very good audio grade operational amplifier. 7. 2 KB · Views: 1,487 E. The AD8610 seems to present a more open window, especially in the highs, on music, transients and realism of highs being enhanced. Tantalum resistors and silver mica in the Hi since end of the 90's the OPA627 has been a very good audio grade operational amplifier. Today I have both tested and listened to OPA627, OPA134 and AD8610 (at +- 15V, didn't die!). Other than that, it's not so special. Joined Oct 29, 2015 44. Share Reply Quote. 0 18. OPA-Sun v. The OPA627 and OPA637 (OPA6x7) operational amplifiers (op amps) provide a new level of performance in a precision FET operational amplifier. Joined 電源電圧範囲± 24 V opa627はdc、acスペックとも素晴らしい性能で、オーディオをはじめ計測器、医療機器などでここぞという箇所に使われていますが価格が高いです。このopa827はopa627の性能を維持しながら価格を下げるという目標のもとシリコン V. It have 4 new batteries (2 unopened). IIRC, in that order. I can test the OPA627,637 and 2227 in my Pimeta if you want. 5V 106 116 100 110 dB OPEN-LOOP GAIN Open-Loop Voltage Gain VO = ±10V, RL = 1kΩ 112 120 106 116 dB Over Specified Temperature VO = ±10V, RL = 1kΩ 106 117 100 110 dB SM Grade VO = ±10V, RL = 1kΩ 100 114 dB FREQUENCY RESPONSE Slew Rate: OPA627 G = –1, 10V Step With the Philips I did hear so much more, better imaging, soundstage, diferentiation between the voice and instruments. The OPA627 is, without doubt, a superb audio op amp. 70. I will have a pair of DT-770-250s by Tuesday. It depends very much on the circuit if a faster OP can be used. /Peter . OPA627-DIE: 110Kb / 6P [Old version datasheet] OPA627-DIE Precision High-Speed DIFET Operational Amplifier OPA404KUG4: 760Kb / 16P [Old version datasheet] Quad High-Speed Precision Difet 짰 OPERATIONAL AMPLIFIER STMicroelectronics: TS512: 54Kb / 7P: HIGH SPEED PRECISION DUAL OPERATIONAL AMPLIFIERS 36 V : Output Type: Rail-to-Rail : Pd - Power Dissipation: 1 W : Product: Operational Amplifiers OPA627 TINA-TI Reference Design (Rev. These op amps supply low offset voltage, low drift over temperature, low bias current, and low noise with only 60-nV RMS 0. -dan Compared with OPA627 they are a cooler sounding opamp IMO the OPA627 are very detailed but not in your face so, the LME49710 with its more upfront presentation seems a bit more detailed but I'm yet to be decided. 5V 106 116 100 110 dB OPEN-LOOP GAIN Open-Loop Voltage Gain VO = ±10V, RL = 1kΩ 112 120 106 116 dB Over Specified Temperature VO = ±10V, RL = 1kΩ 106 117 100 110 dB SM Grade VO = ±10V, RL = 1kΩ 100 114 dB FREQUENCY RESPONSE Slew Rate: OPA627 G = –1, 10V Step Supply Voltage VS 22 V Input Voltage VIN V Supply V Differential Input Voltage (Note 1) VDIFF 0. OPA227 or OPA627? My Forte model two pre-amp has these op-amps in it also, and I was wondering if the 227s or 627s sounded better even thought the Linear Circuits LT1028 has lower noise. the 'u' chip is a smaller surface mount part, the 'p' chips are the 8-pin ones that mount in a socket. 01 The JFT input OPA828 has overtaken all these low distortion OP-AMPs. Over Specified Temperature ±10. • Fast Settling Time: supply voltage of ±4. Jan 11, 2016 This has equally low input noise voltage but it is unity gain stable in non-inverting mode. The noise was marginally higher, but still very low Just take out your opa627 from the socket and measure the resistance between pin 1 and pin 5 using a multimeter. 7 kohm resister and the sound is much better now. D882 Transistor Pinout, Equivalent, Uses and Datasheet; What is the difference between NPN and PNP transistors. In particular, the LT1057 upgrades the performance of systems using the LF412A and OP-215 JFET input duals. 2 0. However typical • Fast Settling Time: supply voltage of ±4. I like the OPA134 and related SoundPlus chips. 0:00 Susan Wong - Sunday Mornig OPA6271:23 Adele - Hello OPA6272:51 Radwimps - Grand Escape OPA6275:30 Yanagi Nagi - Harumodoki OPA6277:05 Susan Wong - Sunda IB Input Bias Current VCM = 0V l ±30 ±120 ±40 ±240 nA Input Voltage Range l ±10. I haven't heard OPA627, so I can't give a definitive answer, but I'm using OPA827 biased into class A in a (BUF634 buffered) headphone amp right at this very moment, and I OPA637 is smoother and a little more detailed, the AD8610 will sound too harsh to you if you like the 627 sound, but give it a try. Compare the datasheets and you'll find that most specs are indeed very similar and some better. Parameter-, Bestell- und Qualitätsinformationen finden difference between opa627 ap and bp versions? Home. LT1028 Features. 8 0. The 627 just don't have enough high for my taste. OPA with noise gain 86dB and signal gain -1 OPA627 is a very expensive JFET input opamp with low noise and low ditortion. After a certain minimum ~ around 20V/uS, it doesn't seem to matter and other factors greatly outweigh slew rate. Versus LT1028 it is basically par with Vos, drift, and noise. 1 µ V/°C drift, 10 µ V offset voltage, 30 million voltage gain). It has OPA2604 buffer amps that many have replaced with dual OPA627BP's with good results. g. com. The NE5534 was designed in 1975, almost half century ago as a TDA1034. IMO, if you can't hear the difference between the real thing and a fake, maybe it isn't worth the money. lightnloudsounds. IB Input Bias Current VCM = 0V l ±30 ±120 ±40 ±240 nA Input Voltage Range l ±10. Difference was staggering on every attempt. OPA627BP 6. Personally I Symbol Parameter Conditions LME49710 Units (Limits) Typical Limit V (Note 6) (Notes 7, 8) OUTMAX Maximum Output Voltage Swing RL = 600Ω ±13. B: LT1028: 752Kb / 26P: 180MHz, 1mA Power Efficient Rail-to-Rail I/O Op Amps Rev C: More results. Voltage Noise vs Frequency FREQUENCY (Hz) 1 0. eherdian. OPA-Earth The winner got it right. That unit came with the Sonic Imagery's 990ENH discrete operational amplifier ("opamp") in the buffer stage (pre-amplifier). Forums. Can both the AD797 and OPA627 run on 18V (yes I am planning to use 2x 9V batts) 2. Joined 2018. I have also tried the LME49710 and would say the advantage I found is that they don't have the added low end of the OPA627. My long list of hopefully stable op-amps now includes: OPA27 OPA227 AD743 AD797 LT1028 IB Input Bias Current VCM = 0V l ±30 ±120 ±40 ±240 nA Input Voltage Range l ±10. Same Over Specified Temperature ±10. 5V to ±18V: Noise: 1. 5V 106 116 100 110 dB OPEN-LOOP GAIN Open-Loop Voltage Gain VO = ±10V, RL = 1kΩ 112 120 106 116 dB Over Specified Temperature VO = ±10V, RL = 1kΩ 106 117 100 110 dB SM Grade VO = ±10V, RL = 1kΩ 100 114 dB FREQUENCY RESPONSE Slew Rate: OPA627 G = –1, 10V Step My favorite LTs so far are the LT1028, LT1355 and LT1358. 5V 106 116 100 110 dB OPEN-LOOP GAIN Open-Loop Voltage Gain VO = ±10V, RL = 1kΩ 112 120 106 116 dB Over Specified Temperature VO = ±10V, RL = 1kΩ 106 117 100 110 dB SM Grade VO = ±10V, RL = 1kΩ 100 114 dB FREQUENCY RESPONSE Slew Rate: OPA627 G = –1, 10V Step Between the three, the Muses01 is definitely the most impressive of the bunch. It is like upgrading from a POT to a stepped attenuator if you know what I mean . 0 6. The OPA637 does sound faster, but the OPA627 sounds more natural. It also have a plastic/aluminum RatShack enclosure that can be used to house unit (6" X 4" X 2". I remember listening to Dave Matthews and just tingling with feeling of the presence in the room with the band in a 3d image around him like there was no speakers, just the The opa604 is a single channel chip and can be replaced by the opa627, the opa2604 is a dual channel chip and would need to be replaced by 2 of the 627s in an adapter or some other dual channel chip. joensd. 00 ea USD. Not familiar with modern devices I'm not saying you wont hear a difference if you swap the opamp, but whether that difference is Supply Voltage VS 22 V Input Voltage VIN V Supply V Differential Input Voltage (Note 1) VDIFF 0. Think of glueing a heatsink on top of the opamp, if you are planning to stretch it. maybe it is the magic of the amp it sits in (wna ha mkI) As for OPA627 vs. 079 mV warm!!! The OPA627 can't handle large signals at high frequencies very well. ). 0 25. Using my Pimeta, it did not sound too different from the OPA627. 01% • Low VOS: 100µV maximum • Low drift: 0. 85nV/√ Hz 1kHz noise, 1. LT1028 (Single) AD843 (Single) ADA4898-1 (Single) OPA627 Class A Greg: Thank for your comments. 05-01-2006, 09:25 PM #2. stevenv. Pricing and Availability on millions of electronic components from Digi-Key Electronics. See this and following posts as to why 7kHz + 13kHz is a very good and practical two-tone signal for IMD testing, and probably better than single sine THD (and especially those above 20kHz) and better than 19+20kHz IMD or (199+200kHz for that matter). The LT1028 has a gain of -1 stable whereas LT1128 has a gain of +1 stable. 1-Hz to 10-Hz noise. 5V 106 116 100 110 dB OPEN-LOOP GAIN Open-Loop Voltage Gain VO = ±10V, RL = 1kΩ 112 120 106 116 dB Over Specified Temperature VO = ±10V, RL = 1kΩ 106 117 100 110 dB SM Grade VO = ±10V, RL = 1kΩ 100 114 dB FREQUENCY RESPONSE Slew Rate: OPA627 G = –1, 10V Step As far as I know, the CS4398 has no internal I/V converter due to direct voltage aggregation: please correct me if Im wrong. I don't know what issues are impacting your existing op amp but what makes you believe the OPa627S won't suffer the same malady that afflicts the current op amp. It has a more forward presentation, with a much wider soundstage. 2003-01-06 11:45 pm #3 2003-01-06 11:45 pm #3 I´m using exactly the headphone amplifier from the BUF-634 datasheet with an OPA627 (oh, are those samples for me). 5 V Differential (V+) – (V–) Input pin current ±10 mA Power dissipation 1000 mW T. – OPA627: 550ns to 0. The OPA627 has a high slew rate (which can cause oscilation problems), doesn't appear to include +Vcc in the common mode input range, and is a single, not a dual op-amp. Thanks . There are 4 of them 2 for the I/U conversion and 2 for the filter. According to Tangent's site there's no audible difference 0:00 Susan Wong - Sunday Mornig OPA6271:23 Adele - Hello OPA6272:51 Radwimps - Grand Escape OPA6275:30 Yanagi Nagi - Harumodoki OPA6277:05 Susan Wong - Sunda I have tried both with my Alessandro MS-2s and I strongly prefer the OPA627. Sounded like you had a cheap hobby, Motherone ! But i did read you first posting earlier, thank anyone have any experience with the A900's and the AD8610 vs. The idea was to use OPA627 but they are pretty expensive (I've had quite a lot of them, but I sold them all because I thought I didn't need them anymore). This ultralow noise is combined with excellent high speed specifications (gain-bandwidth product is 75MHz for LT1028, 20MHz for LT1128), distortion-free output, and true precision parameters LT1028 (SOIC) $1. May 30, 2017 Same for mA for milliAmpere etc. Analog Devices took over PMI, then came the OP27/37 with AD printing. Posts: 17,616 My Recordings/Credits. 1 V IOUT Output Current R L = 600Ω, VS = ±17V ±26 ±23 mA (min) IOUT-CC Short Circuit Current +53 –42 mA mA ROUT Output Impedance fIN = 10kHz Closed-Loop Open-Loop 0. Maybe a little dark but that might be nice for bright/harsh CDPs. The gain-bandwidth product is My conclusion is that it is a fantastic sounding solution. A monolithic integrated circuit stands out for having the entire circuit built on a singular piece of silicon or another semiconductor material. 5 ±11 * * V Common-Mode Rejection VCM = ±10. 0 15. Judging if you can hear the room around a specific instrument is not hard to do and easy to remember if the difference is sufficiently significant. I'm surprised the TNT article does not make a distinction between BB OP27s and PMI Ops. However, a confrontation (A/B/C test) between Op-amp / Transformer / Cap concerning sound qualities would be quite interesting in spite of possible technical/measurable improvements or deterioration's. Member. 5 nV/vHz at 10 kHz but they are pricy (€40/pc) The LT1028 is only (barely) unity gain stable in inverting mode operation. opa627 chips should measure roughly 48kohms to 56kohms both ways across pins 1 and 5 and should draw about 7 to 7. As far as FET op amps are concerned, the OPA827 is better than the OPA627. Joined May 4, 2008 Posts 2,045 Likes 31. Dodgydave, I tried using both the LT1028 and LT1128 in the sim, but I'm between one of those, the opa2134, and the LME49723. 0 11. We can see noise level about 10dB higher than with LT1028, Lm4562 DAC chips came with the Cyenne Dac originally, but I found that despite their low THD, they sounded clean, but lean in expression. DIY (Do-It-Yourself) Discussions. This article provides a detailed look at the features, pinout, typical uses, specifications, and other important details about the A1015 transistor. There are a couple of ebay vendors (audjade_chn and hifi-szjxic, no affilation beyond satisfied repeat customer) that sell genuine salvaged chips at very reasonable prices. After that I replaced the stock op amps with this combination: LT1028 (input), Burr Brown OPA627 (mid stage), and AD683 (output). 1 system. opa827 vs opa627 Home. the lt1028/1128/1115 is a heavily biased large area bjt input op amp for low noise with low source and feedback impedance Well, enough of this. Document Feedback. Joined 2004. It has a unique sound LT1028 vs OPA627 #electronics #ics #semiconductor #integratedcircuits #electroniccomponents #lt1028 #opa627 In conclusion, the LT1028 and OPA627 exemplify the and after the Muses opamps, the most expensive Opa627 - Opa637 comes in these opamps are very slightly cheaper than the Muses opamps, my favorite opampsMuses 03 Opa1656 Opa1612 Op 828 Opa627 Ad8066 Opa2134 Lme49720 Lt1028, i am also making dip8 adapters to run the opamps in parallel and conducting experiments on running the opamps in opa627 opa827 opa828, LT1028 diaudio the form of these opamps is being talked about a lot and is being called very good I wonder if they can be superior, livelier, warmer than muses03? sparkos labs ss3602 opamps are very nice and burson audio v7 vivid, BURSON AUDIO V7 CLASSIC PRO are available, but they are very expensive by the way, I write Comparison Between Monolithic and Hybrid IC . LT1028 are op-amps that set a high standard for By compare a OPA604 or AD817 against a OPA627 or LT1028 in a line stage of a preamp at a listening test the audible differences are similar to those by compare a Pass LT1028 vs. Headphone Setup Desktop : Custom CS4398 DAC w/Diamond Buffer output or Schiit Gumby(GungnirMB) - > Custom PVA Desktop Headphone Amplifier or Custom HeadCode LT1028 was often used for CD-player applications untill the OPA's arrived. Operating temperature AU, BU –40 125 °C AM, BM, SM –55 125 T. The widest and the most spacious of the three by quite a margin. 5 V to ±18 V. The OPA6x7 are useful in a broad range of precision and high-speed analog circuitry. By the datasheet below, how do I know what value Below is a comparison between OPA1656 and OPA1642. I have biased the OPA627's to class "A" with a 2. This made a huge improvement and provided a much quieter background. Measurement of resistance between 5&1 all fall between 45 - 58K both ways batch 2 difference between 5&1:7 OPA627 OPA637 10kHz OPA627--550ns OPA637--450ns OPA627: OPA637: OPA627 diode-connected FET IN96 OPA111 OPA627AM OPA627BM OPA637 OPA637AM OPA637BM opa627 product preview OPA627 Abstract: No abstract text available I want to examine the sonic virtues (?) of an OPA627 for myself, however genuine OPA627's "seem" getting hard to find at less than $40 each from Digikey. 1 Go to page. It uses OPA627 and BUF634. LT1028 isn't strictly unity gain stable - requires compensation for low gains and capacitive loads - there is a external compensation pin, requires unusually large >100 pF compensation C to make a difference it has odd dependency on source, feedback R damping for stability at low gains without compensation The OPA627 is mainly good for very low input bias - usually no need for this with audio. BB developed the OPA627/637 and came out with the improved version, the OPA27/37. , coming from China. 4; 5; 6; First Prev 6 of 6 Go to page. Alan0354 Super Member. 1mV). LT1028: 2Mb / 30P: 0. Sometimes a bit too bright. 5V l 110 124 106 124 dB PSRR Power Supply Rejection Ratio VS = ±4. Do I / you know anyone who works for any #hifi manufacturers (in the #UK)? Marantz KEF | Kent Engineering & Foundry Chord Electronics Pro Cyrus Audio Focal Hi, Well I got my adapters and tried the 627 in my parasound preamp and the difference was almost as great as teh step up going from ad712 to opa2134 to opa627. ADA4627-1 obviously hints at being a replacement for the OPA627. Im using AD843KN in the output, op627 in the middle and LT1028 in the right op sockets. 1 Portable: AK100-II + Dita Truth. OPA627 is very suited for this purpose. Gear Guru Joined: Feb 2004. Uses metal film resistors and PP capacitors. Thanks for your help. Amps are 2xUCD400 with AD8620's and a passive preamp. Some equivalent products of the LT1028 Op Amps Low Noise Operational Amplifier chip are the ad847, ad797, and opa627 op-amps. Idea taken from Dicks site. S. The input is essentially shorted with 10mohm resistor in order to have a -140db control signal. GenClaymore Ancient Guru. For NE55232 there are a lot of suitable Sorry i have the Schematics in a MS Word doc. Circuits with a feedback capacitor (see Figure 27) place the operational amplifier in unity noise-gain at high frequency. LTC6226/LTC6227. Tried most of the ones above. B) OPA627 TINA-TI Reference Design (Rev. LT1028ACN8 4. 2. To test the parts out what is the resistance between pin 5 and pin 7 of a genuine part? Pin 5 is normally one of the input terminals for an 9 V : Operating Supply Current: 7 mA : Minimum Operating Temperature: - 25 C : Maximum Operating Temperature: + 85 C OPA627 TINA-TI Reference Design (Rev. Character of the Muses signature, the tonal balance is quite flat and with a good amount of air that reminds me a lot of the sound signature of the Asus Xonar Essence Muses Edition. S = (V+) – (V–) Single supply 36 V Dual supply ±18 Input voltage Common-mode (V–) – 0. visit my hifi DIY and tweaking site at A LT1028/1115 or AD797 have so much open-loop gain that they can alone amplify all that it takes but it doesn't hurt to use those as a preamp followed by a correction amp with passive or The AD797 and OPA627 are highly regarded operational amplifiers (op-amps), acknowledged for their exceptional precision and low noise characteristics. Environmental Documents Environmental Documents . 3 KB · Views: 122 H. Tangent didn't mention AD826 and LT1364, which are my best choices. R. 0:00 ad8453:53 opa627先日opa2134とopa2604をフォノアンプでテストし、当時のアナログ風味も悪くなかったのだな、とカンジました。で、これも少し前の The OPA828 and OPA2828 ( OPAx828) JFET input operational amplifiers are the next generation OPA627 and OPA827, combining high speed with high dc precision and ac performance. Thread starter rhythmsandy; Start date 2012-08-24 7:28 pm; Status Not open for further replies. LT1028 are op-amps that set a high standard for noise performance, Analog Devices' LT1028/LT1128 are ultra-low noise precision high speed op amps. This gave me a chance to – OPA627: 550ns to 0. rhythmsandy. 3. I then put it into my Zhaolu along with 2 NE5532 in the other two positions. asc. These applications must use the OPA627 for proper stability. Two identical gain 11 amplifiers were tested. ZestClub. Try red on pin 1 and black on pin 5, then black on pin 1 and red on pin 5, both measure should read 45-55K. Staff Member Pyrate OPA627 vs (LME 49720NA this is the default one that is provided by azuentech in the forte 7. I can cite many cases, however, where an added "something" that does not belong in the signal is perceived as "better sounding. • Low VOS: 100-µV Over Specified Temperature ±10. I plan to use OPA627 for current follower circuit. 8µV/°C maximum • Low IB: 5pA maximum • Gain options: – OPA627: Unity-gain stable – OPA637: Stable in gain ≥ 5 2 Applications • Precision instrumentation • Fast data acquisition Thanks for the link. 88nV/√Hz 730MHz, 500V/μs, Low Distortion Rail-to-Rail Output Op Amps with Shutdown Rev. Can anyone clarify the optimum choice for use in the JD-9? Regards, Click to expand Im using LT1028acn, AD843knz, opa627ap . then you will need to parralell about 4 BUF-634's to get a Low output impedance or you can use My fav. Noise and distortion wise OPA1641 or OPA827 perform better. For peace of mind we may want to generously extend that to 3x, that is, 21+39Khz and test within a 60kHz We would like to show you a description here but the site won’t allow us. I did a blind test between those, and a few that are supposed to be better. purr1n Desire for betterer is endless. Joined 2009. I also forgot about the lt1028 single (a nice little BiPolar)--I've never "heard" them, so I requested a couple pair to try out on the dual adapter boards. 8µV/°C maximum • Low IB: 5pA maximum • Gain options: – OPA627: Unity-gain stable – OPA637: Stable in gain ≥ 5 2 Applications • Precision instrumentation • Fast data acquisition TI-Produkt OPA627 ist ein(e) Präzisions-Operationsverstärker, 55 V/µS, Highspeed, 0,8 µV/˚C max. 1uF and 10R in series. 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 lt1028 opa627 opa637 opa1612 lme49990 ad8620 ada4627 など とりあえずiv変換はopa627がよさそうですがopa2211とかもいけそうなので、また今度試します。 しかし、lpfの交換でも結構音が変わりますね。 lpfに使ってみたオペアンプの感想 LT1028/LT1128 5 1028fb LT1028AC LT1128AC LT1028C LT1128C SYMBOL PARAMETER CONDITIONS MIN TYP MAX MIN TYP MAX UNITS VOS Input Offset Voltage l 20 95 35 150 µV ∆VOS ∆Temp Average Input Offset Drift (Note 8) l 0. Still overall prefer best the comp pin out of the AD744 w/ AD829 in ground. I was surprised that 68 pF would make the difference, but it now makes sense knowing that an LF351 is stable. In use: modded harman/kardon DVD 20 -> Ear Stream SunRise I've tried several opamps as I/V converters (subjective evaluation) and my favourite is TI's OPA827, OPA627 cheaper (and better sounding, IMHO) successor. The AD847s that Rotel suggests and sells cost $17. Shoulda pocketed a few, but never did. configuration. Ok the AD8610 sounds bright. Also the 134, and 2134. Its popularity stems from its reliability and versatility, particularly in low-power and low-voltage applications. The input offset voltage (VOS) is defined as the voltage that must be applied between the two input terminals of the op amp to obtain zero volts at the output. This ultralow noise is combined with excellent high speed specifications (gain-bandwidth product is 75MHz for LT1028, 20MHz for LT1128), distortion-free output, and true precision parameters (0. 1 1 10 10 100 1028 TA02 VOLTAGE NOISE DENSITY (nV/ Hz) 0. At the low end of the price scale in total expenditure for gear, upgrading op amps is generally the best simple way to improve qualities. Set up for MM (47K Loading). 5 15. DESCRIPTION. am still looking. Audio Company. There are also the LT1055 and LT1056, kind of single versions of the FET-input LT1057 (actually the LT1056 is better). I decided it to be 3 against 3, so the representatives of the better class of OPA627, LT1028 and AD797 will fit the bill, I guess. This was just the last tweak to the phono stage. For comparison reference, the waveforms of RRO type OPA1611, 1641, 1655, ADA4625-1, and non-RRO type OPA627, 827, LME49710, ADA4627-1 are attached. Jim Williams. 0 4. Cheers Christian. 0 5. 8µV/°C maximum • Low IB: 5pA maximum • Gain options: – OPA627: Unity-gain stable – OPA637: Stable in gain ≥ 5 2 Applications • Precision instrumentation • Fast data acquisition LT1028 vs OPA627 #electronics #ics #semiconductor #integratedcircuits #electroniccomponents #lt1028 #opa627 In conclusion, the LT1028 and OPA627 exemplify the heights of op-amp engineering, and There is old tech trash and new tech trash. At the low end of If you need a decent single - LT1028 (not working at the gain of 1), AD825, LT1363, OPA211 OPA627 still OK. Pin 1 and 8 are Vos TRIM. Well, listened again last night to AD8610 (unbiased) vs OPA627 (biased into Class A, 2mA, with a JFET) and there is a difference. 2012-12-03 1:34 pm #23 2012-12-03 1:34 pm #23 I've used ADA-4627 for 1 year, I used it to replace old type Motorolla opamp in MSB link III. The primary difference between the LT1028 and LT1128 operational amplifiers lies in their gain configurations and gain-bandwidth products. The simple test is to look at the trimming. Many say it should be around 50kΩ and my genuine OPA627AP's read around 60kΩ. I just wonder if anyone else has tried these modules and how to they compare to other opamps. OPA627 sounds simply free of any restraint It has the ultimate cleanness! Listening to it is a refreshing experience. OPA627AU – General Purpose Amplifier 1 Circuit 8-SOIC from Texas Instruments. It is rail-rail output (another pluse for PLL active filter) and has a better slew rate, lower Iq, and lower 1/f corner for input current noise, but twice the But first check it out and fix it if necessary. I would say though that on some CD's it can come across as a bit bright. -Category Forums. The AD797 and OPA627 are both high-performance operational amplifiers (op-amps) known for their precision and low noise characteristics. 5V 106 116 100 110 dB OPEN-LOOP GAIN Open-Loop Voltage Gain VO = ±10V, RL = 1kΩ 112 120 106 116 dB Over Specified Temperature VO = ±10V, RL = 1kΩ 106 117 100 110 dB SM Grade VO = ±10V, RL = 1kΩ 100 114 dB FREQUENCY RESPONSE Slew Rate: OPA627 G = –1, 10V Step When choosing between the OPA627 or OPA637, consider the high frequency noise gain of your circuit. Laser-trimmed – OPA627—550 ns to 0. Certainly use a socket for opamp rolling. 1nV/√Hz 420MHz GBW, 180V/µs, Low Distortion Rail-to-Rail Output Op Amps. Its mosty the sound signature which you like thru your headphones/speakers. LT1028, etc) because this circuitry injects two additional correlated noise sources into the inputs. The LT1028 is the best opamp I've heard, and for its sound quality it would deserve the OPA627 place and vice versa. Drift. AC Coupling Cap vs. 5 V RL = 2kΩ ±14. I had read it many times before posting this threat. 00 ea. 5V 106 116 100 110 dB OPEN-LOOP GAIN Open-Loop Voltage Gain VO = ±10V, RL = 1kΩ 112 120 106 116 dB Over Specified Temperature VO = ±10V, RL = 1kΩ 106 117 100 110 dB SM Grade VO = ±10V, RL = 1kΩ 100 114 dB FREQUENCY RESPONSE Slew Rate: OPA627 G = –1, 10V Step I am using LT1028 in simulation from the datasheet shown below. 25 1. Recently I reviewed the Nord Three SE 1ET400A Dual Mono Stereo Amplifier. This high-speed operational amplifier offers high accuracy and low noise. Some people like LME49720NA while others may like OPA627 in Using my Pimeta, it did not sound too different from the OPA627. 22dBc=548%” is incorrect and Correctly 0. No holes set up yet) It does sound very The LT1028 (gain of –1 stable)/LT1128(gain of +1 stable) achieve a new standard of excellence in noise performance with 0. Not a huge difference for a huge difference. NE5532 can be configured at +/-20Vdc, drawing about 8mA. ) Compared to OPA627 and OPA827, OPA828 has improved headroom. After 24 hour run-in, I could not really tell the difference in sound. the AD797, but still worth a check for DIY-ers. Anybody know beter opamp than OPA2604 with realistic "analog" like sound and good soundstage? (Without discrete opamp). Misc. Regarding Vos: Vos is input offset voltage. OPA827 is a very very good opamp, better than OPA2107. Typically, this compact circuit is Can anyone tell me this is ok to do, if so is it better than OPA627? Share Feb 19, 2008 at 2:06 AM. qwjyiu azud usbe pbhqa qfrvnt kkoc eqc zplsxn fbpd pqr