Opa828 vs opa627 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. 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. 1mV) parametric The entire OPA627 line sounds obsolete compared against OPA828. Tested a lot of OP, including LME49720, OPA1612, OPA1642, MUSES8920 and MUSES8820. I will check OPA828 datasheet. Performances of OPA627 and OPA828 are very close. (3) Short-circuit to VS/2 (ground in symmetrical dual-supply setups). Specs: Very Low Noise: 4. opa627. 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. The design has special speedup circuitry in the J-FET input stage to avoid slew rate limiting and as OPA627 also has a huge differential input voltage range (no antiparallel protection diodes in input, parametric-filter Difference amplifiers; parametric-filter Fully differential amplifiers; parametric-filter Instrumentation amplifiers; parametric-filter Operational amplifiers (op amps) parametric-filter Programmable & variable gain amplifiers (PGAs & VGAs) parametric-filter Special function amplifiers; Precision op amps (Vos. I also notice the more airy sound and the overall music presentation is more special with this op-amp. ad8620 vs opa627 vs. The RKV's circuit uses a lot of feedback, and it is through this how the Opamps shape this amplifier's sound. Texas Instruments OPAx828 JFET-Input Operational Amplifier is the next generation OPA627 and OPA827 operational amplifier (op amp), combining high speed with high DC precision and AC performance. -Category Forums. Would like to try Sparkos in the tube pre-amps too but they are not so cheap. diyaudio. I have chosen the 2. Well, that was then, now I know better, like OPA828, OPA2140 and ADA4625-2. Usage. What I found out was that pretty much every IC OP amp has a weak spot, but OPA828 is now the best jfet input OP amp in general. And OPA828 looks very good. 1 Hz to 10 Hz noise. OPA828 / OPA2828 vs OPA627 Rings my alarm bell too much :) www. Temperature Sensor. 0000x Compared to OPA627 and OPA827, OPA828 has improved headroom. 5 mA quiescent current. Media. OPA827 is also a great op amp for the signal path. Joined 2003. As simple as a resistor from V- to output, biasing the op-amp in to class-A at between 5 to 10ma. Audio Company. You have to be careful with the resistor values you select to place around the op amps. Sounded like you had a cheap hobby, Motherone ! But i did read you first posting earlier, thank We would like to show you a description here but the site won’t allow us. And this preamp sounds MUCH better than Audio Research The performance of the CMOS audio op amps is actually fairly close and maybe slightly better than the OPA627, which was somewhat famous for its performance in this use case. Inductance Sensor. 45 μV/°C typical), low bias current (1 pA typical), and low noise (4 nV/√Hz typical) with only 60 nV RMS 0. Highly Input signals that can swing more than 0. Related items. In final have to say, that OPA1656 is best of the best in I/V for me to now. single. 7k resistor from the opamp output to -Vs. Thank you all for great suggestions! Yep, they released the OPA828 which supposedly is an upgrade for both the OPA827 and OPA627. The OPA627 1 kHz noise is rated at 5. Theory. New posts Search forums Subscribe. com Yep, they released the OPA828 which supposedly is an upgrade for both the OPA827 and OPA627. I also really liked the OPA627 that I had in an audio-gd dac years ago. The high, mid, and low frequencies are nice and balanced. output amplitude. Noise and distortion wise OPA1641 or OPA827 perform better. keep in mind that the OPA828 is much faster than the OPA627, 45MHz compared The entire OPA627 line sounds obsolete compared against OPA828. 45 μV/°C typical), low bias current (1 pA typical), and low noise opa627 chips should measure roughly 48kohms to 56kohms both ways across pins 1 and 5 and should draw about 7 to 7. rhythmsandy. While they share some similarities, they also have differences that make them suitable for different applications. asc. 1uF cap across V+/V- would be sufficient. Even more expensive, but cost is not important to me. JohnYang1997 Master Contributor. 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. MUSES8820 is the best, IMHO. 45μV/°C 典型值）、低偏置电流（1pA 典型值）和低噪声（4nV/√Hz 典型值），噪声仅为 60nVRMS 0. com The OPA828 JFET is the next generation OPA627 and OPA827 operational amplifier (op amp), combining high speed with high DC precision and AC performance. I previously owned a Maverick D2 DAC with 3 OPA627 op-amps and found Part Number: OPA828 Other Parts Discussed in Thread: OPA627, OPA140, OPA2828, OPA827 Hello, We have legacy TIA for photodiode that was using OPA627. 2012-08-24 7:28 pm #1 2012-08-24 7:28 pm #1 hi i The OPA627 sounds less defined and more blurry in comparision. Technical Expert. – OPA627: 550ns to 0. OPA828 was better. Dont make me laugh, if you can't hear the difference 5532 vs OPA1612 than you should not be very concerned about SQ (in your case). This presented itself as a more refined and detailed version of the OPA2604. There are no DIP versions, but there is a dual version which could be good for small portable amplifiers. Equipment Forums. But of course, how they're implemented and how they interact with the sound system as a whole makes all the difference. double. 5 nV/vHz at 10 kHz but they are pricy (€40/pc) ! They are still manufactured and available. OPA627 seems to have a tiny bit more clarity. The OPA627 is mainly good for very low input bias - usually no need for this with audio. The effect is in clearer mids and highs and the overall In September I wrote about our discrete OP amp vs. It has a more forward presentation, with a much wider soundstage. 5 mA/channel, typical. Forums. 5. The entire OPA627 line sounds obsolete compared against OPA828. opa637 vs. It depends very much on the circuit if a faster OP can be used. Tried in this place OP275, OPA1612, OPA1642, OPA1656 and OPA828. Computer Audio. However, since music signals are not suitable for measurement purposes, I think it makes sense to extend the measurement frequency for the sinus signal much more further outside the audio range - I would say between 100KHz and 300KHz. Reply reply bgravato • I had The only online material left on the Headsave Classic is my Head-Fi thread from 2005. The OPA627 and OPA637 (OPA6x7) operational amplifiers (op amps) OPA828 ACTIVE High-speed (45 MHz and 150 V/μs), 36-V, low-noise (4 nV/√Hz) RRO JFET operational amplifier Wider bandwidth higher slew rate rail-to-rail output JFET op amp. (800) 346-6873. Since they have identical response within the audioband, It is most likely that the standard ideal opamp should work well for audio active filters. 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 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. Joined 2012. 2020-01-19 10:28 pm #103 2020-01-19 10:28 pm #103 OPA627 and OPA827, combining high speed with high dc precision and ac performance. Find more 44, 200333150 and 100000306 products. And I know Burson advises the use of a film cap across V+/V- for the V6. The biggest factor giving me doubts is the price difference between 1641 and 211 or its audio grade 1611. J. Reply reply The OPA828 was not on my radar at all and seems to outperform both the venerable OPA627 as well as all the newish TI opamps that everybody is using these days and that seem to be good already for -140 dB distortion in practical DAC and ADC applications so it is hard to believe the older (though more expensive) OPA828 should be that much better yet. That's the reason why the RKV is virtually immune to tuberolling. Did anybody so far try the quite new OPA828 as I/V for PCM1704 or the like ? It is marketed as an modern upgrade for OPA627/637 and 827 at a fraction of their costs. Since noise dominates the THDN at lower amplitudes, it will continue to reduce vs. I do hear a difference between two different Burr Brown numbers. Newer op amps provide a far more detailed and precise sound, which in turn also results in a broader tonal range. I have OPA627's on a Stokes SDS class A headphone amplifier, before those i tried lower priced opamps. For OPA627, the improvement is substantial. Nvarcher OPA828 Single /Dual OP AMP third generation upgrade OPA627 AD797 For HIFI Amplifier DAC board. And for IM measurements a two tone sine wave 199KHz+200KHz The AD797 and OPA627 are both high-performance operational amplifiers (op-amps) known for their precision and low noise characteristics. Joined 2004. And it is huge, I hear much more details and nuances with a discrete solution in my favorite music. 5mA/channel (typical). 1 Portable: AK100-II + Dita Truth. 45 μV/°C typical), low bias current (1 pA typical), and low noise I'm considering the OPA828 for my Whammy build (+/-15V discrete reg). 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. The LT1028 and OPA627 each represent a pinnacle of op-amp engineering, renowned for their precision, low noise, and versatility. IC OP amps and mentioned that OPA627 was the best jfet input OP amp I knew. OPA627 and OPA827, combining high speed with high dc precision and ac performance. Google probably thinks it's old news like everyone else. Any takers? Home. Earlier you listed OPA828 together with the 14x series, but this one is clearly advertised as the successor of 627/827 and it uses EF output and likely similar overall topology. Customer Reviews Specifications Description Store More to love . Actually, 2604 is a little expensive than 2134. opa627：纵向和横向声场宽广，三频平衡，低频下潜够深，量一般，中频不过不失，高频通透，延伸好，在加装散热片的前提下，电压提高到±18v 我用opa2107换紫珊diy便携无损播放器中的贴片2134（i/v – OPA627: 550ns to 0. 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). Customer Reviews (2) Specifications Description 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. But, both have great 1/f nose and THDN overall, and fairly flat open-loop output impedance, so there shouldn't be any major audible differences. ? For use with this DAC, my preference order is like: AD843AQ > OPA627 > OPA828 > OPA1656 > OPA1612. There's no shortage of candidates here, and the new OPA1656 is a great option, but you could also check out: OPA1642, OPA1678, OPA827, and the newer OPA828, or also OPA2810. lm4562 Home. Re noise, 4nV/rtHz is good enough for me. 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 It uses OPA627 and BUF634. 1Hz 至 10Hz。 Hi since end of the 90's the OPA627 has been a very good audio grade operational amplifier. www. So, the OPA828 might need extra efforts referring to layout and decoupling. 5 V beyond the supply rails must be current-limited to 10 mA or less. If 2134 is better here, AD744/AD746 or OPA627/OPA637 uses two voltage gain stage in the NFB-loop (LTP-VAS-Buffer) My lord the difference in imaging was such that I thought I had Dolby upmixing on and my center channel was going! Interestingly, Maverick does offer an op amp upgraded version of their product with the “opa627” installed. Sounds like those are amazing though. The OPAx828 operate over a wide supply-voltage range of ±4 V to ±18 V and a supply current of 5. For +/-18v The opamp is supplied from +/-18. Share Dec 8, 2006 at 9:17 PM. I'm curious if anyone thinks there's a risk for oscillation in the Whammy? Also looks like TI recommends a decoupling cap on the supply pins. Lower current noise will accept higher source and FB impedances. OPA637 data sheet, product information and support | TI. Color: single. 2 sold. I make it for myself or in a very small lot. OPA828 Third Generation Upgrade OPA627 AD797 Single and Dual Op Amp. TonyJZX Major Contributor. Just figured 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 keep in mind that the OPA828 is much faster than the OPA627, 45MHz compared to 16MHz and 150V/µs versus 55V/µs. Joined Mar 1, 2006 Posts 10,891 Operational amplifiers (op-amps) are foundational components in the world of electronics, serving as the building blocks for a wide range of applications, from precision instrumentation to high-fidelity audio equipment. Jump to Latest R. The OPA1641 would be a good alternative for the OPA627 in the servo, or for that matter, in the signal path. The OPAx828 operate over a wide supply-voltage opa827 vs opa627 Home. . The RKV also has an auto-bias circuit on top of that, so differences between tubes (manufatcurer, age, etc. But of course, how they're Blind listening with headphones saw me select OPA627 and 827 with the same character and resolution of bassline behind piano (maintaining timbre), against a small Lm4562 DAC chips came with the Cyenne Dac originally, but I found that despite their low THD, they sounded clean, but lean in expression. opa627_vs_ideal_opamp_mod. If they are too high in value their thermal noise will exceed the voltage noise of the op amps, and degrade the overall noise performance of the amplifier stage. Model Number. May be 828 will be better, but i have to do some thing in the board to extract best of it. DIY (Do-It-Yourself) Discussions. In my opinion, better than the OPA627 but it has not yet earned its stripes in the audio community. lme49713 vs opa627 vs AD815 vs opa2134 vs opa1612 vs opa2836. Dear all, I would like to ask a question about output voltage range. I got OPA828 as soon as it was released, loved it, and have been using it for over OPA627はあらゆる点でバランスの良い音が出る優等生です♪ OPA828はとてもそれに近い血統の製品ですが、それとはかなり違う音のカンジがします。 ユニティーゲイン 627は今更なカンジもしますが、827、828はどうなんでしょうね？ データーシート的な観点からは、MCカートリッジのような信号源インピーダンスの高い入力には828 OPA828 and Burson V5i seem to be worthy contenders for the OPA627. Color: OPA828 Single OP. Joined May 4, 2008 Posts 2,045 Likes 31. What's new. 1 Absolute Maximum Ratings over operating free-air temperature range (unless otherwise noted)(1) MIN MAX UNIT Supply voltage, VS = (V+) – (V Buy OPA828 third generation upgrade OPA627 AD797 super op amp single op amp dual op amp at Aliexpress for . Thread starter chinesekiwi; Start date Aug 28, 2008; Aug 28, 2008 at 2:59 AM Thread Starter Post #1 of 9 chinesekiwi Headphoneus Supremus. I even notice a difference between AP and BP versions of the OPA627 on the SDS. I was just wondering if some better alternative (price does not matter) has come along the last decade ? opa627 628の次世代と謳ってるのを痛感しました！ ある程度のOPAMPならばと思っていましたがOPA828 の音は手持ちのOPAMPにはない音がしています かと言って低中域も固い音、柔らかい音もでるのでジャンル問わず聞けるOPAMPでも有ります OPA627 and OPA827, combining high speed with high dc precision and ac performance. 1-Hz to 10-Hz noise. is_customized. +44 (0) The OPA828 operates over a wide supply-voltage range, ±4V to ±18V, on a supply current of 5. joensd. If there are more complicated parts (especially active parts) in the FB path, a faster OP can be a problem. Joined Aug 20, 2021 Messages 2,450 Likes OPA828. 6 nV/√Hz typical, while the OPA134 is rated at 8 nV/√Hz typical. AD843AQ has best clarity and authority. HiFiNutNut. 2013-09-12 9:43 am #3 2013-09-12 9:43 am #3 Dale, To me To you Thank you wholeheartedly Bill PS. 🙂 OPA828 will have lower THD20kHz - my guess. Member. New media New comments Search media. The OPAx828 Low-Offset, Low-Drift, Low-Noise, 45-MHz, 36-V JFET-Input, Operational Amplifiers, OPA828 Datasheet, OPA828 circuit, OPA828 data sheet : TI, alldatasheet, Datasheet, Datasheet search site for Electronic Components OPA627 and OPA827, combining high speed with high dc precision and ac performance. The OPA828 JFET is the next generation OPA627 and OPA827 operational amplifier (op amp), combining high speed with high DC precision and AC performance. Misc. New posts New media New media comments New profile posts Latest activity. Thread starter rds; Start date Aug 26, 2008; Aug 26, 2008 at 5:53 AM Thread Starter Post #1 of 7 rds Headphoneus Supremus. At higher gain, I use OPA637. Joined 2002. 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). I wonder if a 0. I doubt I will jump up enough to try a Sparkos or Burson. When the output voltage range of the OPA627 was confirmed, only the case where the power supply voltage was ± 15 V was described as follows. I Note the OPA627 graph shows THDN at +/- 10 V, whereas the OPA1644 and OPA828 use +/3 V. I’ve got a D1+ on order with these in there and will be listening with them and then with the Bursons. This op amp supplies low-offset voltage (50 μV), low-drift over temperature (0. I hear OPA828 is the new version of the OPA627, so I may try that one out. Hign-concerned Chemical. 7. I will keep you updated once I am through with comparing. The OPA828 datasheet calls for bypass caps. The OPAx828 operate over a wide supply-voltage OPA828ID Texas Instruments Operational Amplifiers - Op Amps High-speed (45 MHz and 150 V/ s), 36-V, low-noise (4 nV/vHz) RRO JFET operational amplifier 8-SOIC -40 to 125 datasheet, inventory, & pricing. After 24 hour run-in, I could not really tell the difference in sound. TI lists OPA828 as being a "drop-in" replacement for it First point of comparison was with amplifier input having Toshiba 2SK170/2SJ74 input, where input JFET buffer pair was replaced with OPA828 in the unity gain configuration. none. But I do hear the difference between OPA627 and V6 Vivid. com. It was not only my opinion. There is a nice Teardown of a real vs fake OPA627 on the webs. Best SQ have with 1656. 1. com Buggle2 Riaa board. These op amps supply low offset voltage, low drift over temperature, low bias current, and low noise with only 60-nVRMS 0. What is wrong with me?) Desktop: S-Audio Focus 2 + NiNO Final Carbon Mk3. However, there is a difference from rail-to-rail OP-AMPs. Yes. Neither of these newer op amps is available in DIP package which may be a consideration. Versus the NE5532, of course Considering the 5532 was released in 1979 and the 1656 in 2019 (it's TI's latest), that's 40 years of cumulative audio engineering in the making! Preferred the opa627 until the Sparkos ss3602 for it arrived. Upgrade your audio equipment with the versatile OPA828 integrated circuit op amp, a perfect replacement for opa627, ad797, and NE5534. When I tested OPA827 vs. 孤高のエンペラー。その音は、他を寄せ付けない圧倒的な存在感。時に威圧感すらある。透明感・ダイナミズム・開放感・表現力と、どれをとってもその辺のディスクリート回路より良い。僕はこの石に出会ってディスクリの勉強をやめた。 Buy OPA828 Third Generation Upgrade OPA627 AD797 Single and Dual Op Amp at Aliexpress for . Even AD797 or OP627 cant hold a candle vs OPA1612 in terms of SQ - the difference is HUGE! My preamp sounds best with OPA1612 for gain and OPA2192 as buffer. Technical documentation. Texas Instruments' OPA828 JFET is the next generation OPA627 and OPA827 op-amp combining high speed with high DC precision and AC performance. Any takers? Do you mean for audio? I glanced through the data sheet I understand OPA627 is a legacy Op amp. These op amps supply low offset voltage, low drift over temperature, low bias current, and low noise with only 60-nV RMS 0. I found that Texas Instruments released a successor to the OPA627 opamp in 2018, the OPA828. Hope this helps, I know there is little difference between these two OP, but I want to know which is better. 0 2 Reviews ౹ 2 sold. 5V (LM117+LM337). I read the datasheet briefly and it doesn't look like the sucessor of the OPA627. 45 μV/°C typical), low bias current (1 pA typical), and low noise OPA627 and OPA827, combining high speed with high dc precision and ac performance. OPA627, I liked OPA627 better. 01% – OPA637: 450ns to 0. Members. Next, we will take a closer look at the comparison between the AD797 and OPA627. Now I am using pairs of V5i and OPA828 with great results. Enjoy Free Shipping Worldwide! Limited Time Sale Easy Return. 01% • Low VOS: 100µV maximum • Low drift: 0. This op-amp supplies low-offset voltage (50 μV), low-drift overtemperature (0. Do you know if the OPA828 performs like the OPA827 in this aspect? 00940. Part Number: OPA627 Other Parts Discussed in Thread: TINA-TI, OPA828. Customer Reviews (0) Specifications. Ideal for DIY power amplifiers, DACs, and professional audio gear. Like The entire OPA627 line sounds obsolete compared against OPA828. 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 OPA828 JFET 是OPA627 运算放大器的升级版本，集高速度与高直流精密、高交流性能于一体。该运算放大器可实现低失调电压 (50μV)、低温漂（0. lightnloudsounds. 6 Specifications 6. 3 KB · Views: 124 H. Post #4 of 9 tomb Member of the Trade: Beezar. Maybe biasing the AD8610 will shift it to another Can you tell me the sound difference between the V3 and AO200? T. So both suggestions from you guys have been helpful (across V+/GND and V-/GND). Others than that, the OPA627 can deliver the 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。opa828がどの程度改善されたのか知りたくないですか？opa828は最新型に The OPA828 JFET is the next generation OPA627 and OPA827 operational amplifier (op amp), combining high speed with high DC precision and AC performance. /Peter . Find more , and products. ) are virtually eliminated. These op amps supply low offset OPA627 and OPA827, combining high speed with high dc precision and ac performance. Our customers are going to use with output voltage 5V. Used OPA1656 in I/V of PCM1792 in dual mono configuration. 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. The OPA627 (still) is a remarkable ultra high quality FET-OPAmp which came to the market in the 90ies, if I remember correctly. The difference for the OPA627 is far more realistic and more intimate. Thread starter rhythmsandy; Start date 2012-08-24 7:28 pm; Status Not open for further replies. mnpttykc xffoy eqv wxbjv jlb eqwwxltu aeua papbbk jeo spwkhmb