Opa1642 vs opa1656

Opa1642 vs opa1656. OPA1612 or OPA1642. 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 OPA1656 in I/V Hack 0dbFS 24-bit 48kHz Note that V2 gets minimizes the higher harmonic spikes, but trades them off with rising noise. Rp55. OPA1679-Q1. The LME49860 has a wide supply range of ±2. In particular, it has good dynamics and a low level of harmonic distortion. Musician and DIY builder Expert in loudspeaker installation for optimal pace, rythm and dynamics. For this example, we are using the OPA1656 in a non-inverting configuration with a gain of 40 dB or 100V/V. 00005 % OPA1656 / OPA1612 / Burson V5i / OPA627 / Genuine NE5532 / Genuine Muse 02 / 0PA1622 / OPA1642 / OPA1602 The question of Op amps has already been debated on DIY audio, and I had used the OPA1656 and I think the opinions are unanimous, these Op amps are very good and seem to work the best with those amps. External dimensions: 127mm(L) * 109mm(W) * 25mm(H) Parameters: Input voltage: DC5V Power input OPA1611 might suit yes. Very nice presentation in the link! OPA1622 SoundPlus High-Fidelity, Bipolar-Input, Audio Operational Lead finish/ Beli OPA1642 Dual SoundPlus™ JFET Audio Op-Amp O1642A SOIC-8 Texas Instrume di Lisu Instrument. This video title is; 2Which OpAmp is Better for 20W Class A Amplifier - OPA2604 vs NE553 I want to drive a non-inverting OPA1656 from the wiper of a volume pot -- which means a range of source resistance for the OPA1656 from 0 to <del>Rpot/2<del> Rpot/4. The OPA 1642 is adopted for this circuit. Shameless plug I just highlighted the OPA1656 in my latest application note. Jan ••• The LME49860's outstanding CMRR (120dB), PSRR (120dB), and V OS (0. Joined Sep 4, 2021 Messages 9,115 Likes Below are THD+N vs. NE5532 is a very good amplifier especially for the price ($0. We suspect that the circuit is marginally stable. parametric-filter Audio Hey Gerald, Thank you for providing the datasheet. Newk Yuler Active Member. Close to zero DC mv at its output would enable removal of the dreaded electrolytic coupling caps which will definitely lower colouration and I've read about the 'Sondigo vs. The OPA1656 can operate with as little as 4. ounding-op-amps-lowest-thd-8. Two identical gain 11 amplifiers were tested. Goggle bill d mod carver c-1. Explore our portfolio of audio op amps and deliver a superior audio experience to your customers. Total Noise of OPA1656 vs OPA1612. com I had the chance to gather up a selection of opamps from my parts bin, including BB OPA2604, OPA637, AD823, LME49860, JR4556, Muses8820 and 8920, and compare them against each other along with a Burson V6 Classic (thanks to them for sending me an evaluation). the differences aren't huge, but big enough to make a change worthwhile. Can you recommend me a good Jfet to try to model the noise ? To see if it's worth it versus a simple opamp. 5). 5 V between the I measured again the noise of OPA1656 vs OPA1642. Below is a comparison between OPA1656 and OPA1642. I don't have the books you mentioned but I do have a book called Small Signal Audio Design by Douglas Self. 1 1 μV/V INPUT BIAS CURRENT VCM = 0 V ±60 ±250 nA IB Input bias current VCM = 0 V, DRG package only ±60 ±300 nA IB over temperature(2) TA = –40°C to +85°C OPA1611 vs OPA134 or OPA1612 vs OPA2134. Thread I replaced it with an OPA1642 and am sorry to say that there is a big difference sound-wise. 1 nV/√Hz at 1 kHz Switched over to OPA1642 just because of that (that one sounds fine as well). Features include 5. My own conclusions with MUSES: In I/V stage: - MUSES8920 is maybe modern production 3886 are all above average? the designs seem to take the 'typical' GBW spec as the effective minimum My guesstimate puts the safe with production variation margin local closed loop gain corner as low as 100kHz for LM3886 with a greater than 4:1 range designing for stable extra loop gain from the nice input op amp OPA1655 , OPA1656 SBOS901C – MARCH 2019 – REVISED SEPTEMBER 2022 An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications, intellectual property matters and other important disclaimers. 8. 9‑nV/ SoundPlus™, hohe Leistung, JFET-Eingang OPA1642-Q1 I have also tried opa1642, 1612 and 2134, but they are all slightly inferior to lm4562 soundwise in Aiyima a04. 6 mA of supply current per channel. 5-nV/√ Hz noise density with an ultra-low distortion of 0. 1 The OPA1655 and OPA1656 (OPA165x) are Burr-BrownTM op amps designed specifically for audio and industrial applications, where maintaining signal fidelity is crucial. Originally we used OP 275, we adopted OPA 1642 for recent lot. TI’s OPA2626 is a High-Bandwidth, High-Precision, Low THD+N, 16-Bit and 18-Bit ADC Drivers. OPA1655. The OPA1652 and OPA1654 op amps offer rail-to-rail output swing to within 800 mV with a 2-kΩ load, which increases headroom and maximizes dynamic range. Overall, don't recommend opamp rolling. 5 µV/°C), and low bias current (±5 pA) combined with very low broadband voltage noise (3 nV/√ Hz) . 25 V THD plus Noise: 0. OPA1656: High-Performance CMOS Audio Op Amp . The current noise paired with high source impedance translates into additional voltage noise on the input and this gets amplified by the gain in the design. He discusses the Sallen and Key High Pass filter in this book and also the distortion. BTW it is a real pity OPA2828 does not exist in SOIC. Since I am not interested in the V6 Vivid Dual that it comes with. The OPA169x operational amplifiers achieve a new level of performance for low-power amplifiers with a low 4. 6 Electrical Characteristics: VS = ±15 V at TA = 25°C, RL = 2 kΩ, and VCM = VOUT = midsupply, unless otherwise noted PARAMETER TEST CONDITIONS MIN TYP MAX UNIT AUDIO PERFORMANCE THD + N Total harmonic distortion + noise 0. Funny you should ask about the audio version of OPA2156 (will be called OPA1656). I talked yesterday to my buddy Greg B. 7mA based on your OPIC LDC, rogs. Tangent didn't mention AD826 and LT1364, which are my best choices. What's new. The OPA1622 op amp is unity-gain stable and provides excellent dynamic behavior over a wide range of load conditions. The OPA1656 has very good THD + N. OPA1652 Output voltage vs. Forum Donor. I used opa1642 in 2015 though #17 2022-10-29 7:38 am #17 The thread was started in 2014. (Normally one would probably point to LM4562 as being the best compromise, but I think the Quiescent Current of 10mA is OPA1611, OPA1612 SBOS450C–JULY 2009–REVISED AUGUST 2014 www. By the way, what is the continuous voltage between the inputs of the I/V converter opa1656 真的是一款 几乎没有，基极电流不应该有大的变化。如果真的负面影响很大，厂商的推荐电路就应该用OPA1642 OPA1642 on adapter, make sure to check decoupling and make sure to check for oscillation. Current visitors. Combined with its Audiophonics is proud to present its OPA line-up with the OPA1642 based on a authentic Texas Instruments chip. When we developed the OPA1656, this was also a major Rail-to-rail output. I did not know that packaging of 75 vs 2500 will affect the pricing. The gate oxide of the input MOSFETs on most CMOS op amps can not handle differential voltages up to the supplies. OPA1602, OPA1604 PARAMETER CONDITIONS MIN TYP MAX UNIT The advantage of OPA1656 is that it has JFET inputs rather than bipolar, so its input bias current is much lower, making it easier to keep the output DC offset low in some applications. This OPA1642 OPA is mounted on a DIP8 socket, enabling it to be easily connected to a circuit accepting this format. The OPA1642 is significantly inferior to the OPA1612 in many regards (GPW product, output drive, distortion vs output load, input voltage noise for example). MUSES8820 is the best, IMHO. Datasheet: 764Kb/21P. There are some things to watch out for when swapping op amps. Unique features, such as rail-to-rail input and output voltage ranges, wide bandwidth (25 OPA137 — Single, 36-V, 1-MHz operational amplifier with rail-to-rail input to V+ OPA141 JFET-Input Audio Op Amps OPA1642 Burr-Brown™ single audio operational amplifier OPA1656 However it draws quite substantial current when idle. I have the Opa1656 and it’s fantastic! I’m dying to try the Opa1692 as I’ve heard it’s nice sounding and more importantly great in the voltage stage of your rig. By georgehifi March 22, 2022 in Stereo Amplifiers & Pre-Amps Share This is how I got a set of these including OPA1642 and OPA827. I have my preference for one of these three references because I hear it OPA1642 Datasheet. The OPA1662 (dual) and OPA1664 (quad) series of bipolar-input operational amplifiers achieve a low 3. 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 Some OpAmps references such as the OPA1656, OPA828 or OPA1642 (there are others) are available from TI and are perfectly suited to the circuit of this amplifier. Hi there probaly a simple question maybe not. I like the OPA1642 due to its MUCH reduced bandwidth compared to the 1656 (11MHz vs, 55 MHz)---thus much less chance of oscillation in vintage circuits. X-fi Prelude' comparison a few threads down and I basically concluded from that the AD8620 might be considered better than the default LM4562. I had read it many times before posting this threat. The OPA1655 and OPA1656 (OPA165x) are Burr-Brown™ op From the data sheet, in comparison to the OPA1642, I see that the OPA1656 has slightly less voltage noise but also slightly more current noise; slightly faster and OPA1642: vs. OPA1656 had respectable slew rate without slew boosting so I opted to forego that circuitry in the audio part. Burr-Brown™ single audio operational amplifier OPA1656 So, I generally would recommend replacing the LME49720s with OPA1642 or OPA1656- with a slight preference for the cheaper, lower current OPA1642. Comes with original box and power supply. The OPA1642 has more open at the high frequency, it is The OPA1641-Q1 (single) and OPA1642-Q1 (dual) series are JFET-input, ultra-low distortion, low-noise operational amplifiers (op amps) fully specified for audio Which of the two mentioned OP Amps (OPA1612 or OPA1656) is the better one, in a scientific point of view. 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. Also comparisons of the OPA627 and OPA637 would be good. There are several hundred LM4562 DIP (UK supplier) that I got up to Oct 2016. Find parameters, ordering and quality information. Although specifications of OPA1612 (bipolar) indicate they are superior to that of OPA1642 (JFET inputs) in practice OPA1642 performs slightly better. Find parameters, ordering and quality information I'm gonna get the 1656 samples next week and have my surface mounting friend get them on dip adapters. But this time it's a bit more interesting. Listen to the V3 with different dual op-amps socketed and experience the changes in sound! The demonstrated op-amps include NE5532, JRC4580D, Sparkos SS3602, OPA1642 (Enog) vs OPA1656 (Jnog). amb Site Admin Posts: 12153 Likes: 285 posts Liked in: 766 posts T2 computer USB sound card DAC fever HIFI decoder optional fiber coaxial USB Input Dual TDA1305T parallel output Optional fiber/coaxial/USB Input Dual TDA1305T parallel output USB with drivers, plug in the computer and install it by itself. Output Current characteristic curves seem to behave in opposite manners. VOS Input offset voltage VS = ±15 V ±100 ±500 μV dVOS/dT VOS over temperature(2) TA = –40°C to +85°C 1 4 μV/°C PSRR Power-supply rejection ratio VS = ±2. 1-nV/√ Hz noise density with an ultralow distortion of 0. As the TL072 is an op-amp with FET input stages, it is wildly different from the other op-amps that have BJT inputs. The FET-input architecture achieves a low 2. The OPA2156 is the first in a planned new generation of 36-V, rail-to-rail operational amplifiers (op amps). Its low gain bandwidth makes OPA1642 a nice option for retrofits, it will work fine on an oldskool PCB. 25V min / CMOS OPA1642 - ADA4898-2 - OPA1656 (if the circuit around it is right, it performs like opamps which are much more expensive, because of the FET Input stage it doesn't produce so much noise even with higher resistor values on its inputs) - AD8599 It's made on the same process as OPA1612, OPA1642, OPA1622, OPA1692, and many others. Dual customzied solution will give unmeasurable distortion This cheap op-amp is the most natural sounding op-amp compare to the bright sounding OPA1642. Security & privacy We respect your privacy so your personal details are safe. I was finding 30-40% to be below-par in terms of burst noise. This appears to be confirmed by the datasheets and is not a trivial difference---about 6 db; This is my first time doing anything DIY with audio. To Tubey, better late than never - I just replaced all NE5532 amps in Benchmark DAC1 with OPA1612 and play it so far for few hours. Voltage Feedback vs. 2V, 50MHz, Low-Noise, Single-Supply Rail-to-Rail Operational Amplifier. OPA1679. Find parameters, ordering and quality information TI’s OPA1642-Q1 is a Dual automotive soundplus™ high-performance, JFET-input audio op amps. 3 nV/√ Hz noise density with an ultralow distortion of 0. html#post6555025 that is saying that the OPA1656 is quite a bit noisier than the OPA1642 AT LOW FREQUENCIES (100 Hz). DOUGLAS SELF) Introduction: Audio design has for many years relied on a Figure 3-4. FWIW, I felt the opamp swap made a much bigger difference sonically compared to the V2, which from I understand was mostly a firmware trick to do different maths on the signal. 100uV offset x gain of 5 = 0,5mV . measurements of their other amplifier, which was impressive. I don't know all the differences between the two parts, OPA2140 is obviously trimmed for lower offset and therefore more expensive, but no idea if there are any other differences and what they are. 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. (or the 2156) The opamp has good phase margin and seems quite tolerant of sub-optimal layout. Other Parts Discussed in Thread: OPA4134, , OPA1656, OPA828, OPA627, TL072, OPA1612, JFE150, OPA202, BUF634A, INA1620, OPA1678, TL074, OPA1679, OPA1641, OPA1655, OPA1611, OPA637 This is a set of measurements of 19+20kHz IMD distortion of the following opamps: AD4627, ADA4898, AD8597, OPA140, OPA141, OPA1641, OPA209, OPA1611, OPA637, NE5534. 1nV/√Hz @ 1 kHz, with distortion of only 0. AliExpress assurance. Last edited: Low voltage noise JFET and CMOS (OPA1642, OPA827, OPA828, OPA1656/2156). Slew rate: 24 V/µs; Gain bandwidth product: 53 MHz; Rail-to-rail output; Wide supply range: ±2. Donations. When the device is configured as a transimpedance amplifier (TIA), the 1. 5nV/√ Hz noise density with an ultralow distortion of 0. I was expecting them to do a decent implementation with OPA1656 and they didn't disappoint. Depends on at what frequency you look; noise-wise, the OPA1642 is better below 500 Hz and the OPA1656 above 500 Hz. Review Index. 25V to ±18V At TA = +25°C and RL = 2kΩ, unless otherwise noted. TI 的 OPA1656 是一款 SoundPlus™ 超低噪声和失真、Burr-Brown™ 压摆率：24 V/µs; 增益带宽积：53 MHz; JFET 输入音频运算放大器 OPA1641-Q1 — 单通道汽车类 Sound-Plus 高性能、JFET 输入音频运算放大器 OPA1642 However they measure and perform worse than SOTA audio ICs like lme49720, opa1612, opa1656 etc. antcollinet Master Contributor. If I could also request test of: OPA1642 ~ 2 Euro OPA1656 ~ 2. 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. The temperature range is specified from –40°C to +125°C. 2-nV/√ Hz noise density and distortion of –127 dB at 1 kHz. 5V to ±22V. In 2022 one would suggest OPA1642 and OPA1656 methinks. New posts Search forums. 18 Aquí nos gustaría mostrarte una descripción, pero el sitio web que estás mirando no lo permite. This latest addition of high-voltage CMOS operational amplifiers, in conjunction with the OPAx171 and OPAx170, provide a family of bandwidth, noise, and Choosing of best sounding OP AMPs for the lowest possible THD+N - really the best Approach ?? First some extracts from the rubric "Integrated Opamps and their Properties" (From page 109-165 in the book "Small Signal Audio Design" - go to Facebook from Mr. Joined Mar 5, 2019 Messages 155 Likes 252. common mode voltage that I've measured on any op amp. I was literally sitting in the lab with the systems engineer for that part, measuring a composite amplifier made up of OPA1656 + BUF634A, when we saw your post. who builds large PA speaker systems. Easiest is to replace LF351N and LF353N for the OPA134 and OPA2134 just like the shop in Idaho did. 4 nV/rthz. Normally, that's not newsworthy because higher performing parts are coming out all the time. It needs an adapter though. OPA1662-Q1. Parameter-, Bestell- und Qualitätsinformationen finden OPA1642 SR - Slew Rate: 20 V/us 20 V/us Standard Pack Qty: 100 2500 Subcategory: Audio ICs Audio ICs Supply Voltage - Max: 18 V 18 V Supply Voltage - Min: 2. $90 $80 - Friends and Contributors $100 $90 - everyone else . The schematic, spectrum and results are given Opa1656 and opa1612 without tweaking have better performance than almost any discrete solution. (1) Please see Thermal Considerations section for information on ambient vs device junction temperature 6. 25 V) to +36 V (±18 V). It was recently re-capped and all new guts put in . Regarding the tone stack, if there is enough gain in the front-end, the input-referred noise may not be impacted by the resistances. Logged hummusdude. 000015% at 1 kHz. The OPA1622 is a slow device compared to the OPA1612/OPA1656. Three different gain outputs, (high, medium, and low). Select from TI's Operational amplifiers (op amps) family of devices. Would you recommend your OPA1656 for this task, or the OPA1642 (i'd be using SOIC to DIP adapters as the older TL072's are in DIP IC sockets). I wasn't quite sure how much current the voltage multiplier would consume, but I came to an estimate of ~1. The OPA1641, OPA1642, OPA1656 AKTIV Burr-Brown™-Audio-Operationsverstärker SoundPlus™, extrem rauscharm und verzerrungsarm SoundPlus™ audio op amp with wider bandwidth and lower noise. 25 V to ±18 V supplies while maintaining excellent performance. 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 The original amp has the OPA1656 and the other has the OPA1642. I trying opa1612, opa1656 and opa2156. ah so much other untested opa's 1678 still on my list ina1620. 1 nV/√Hz at 1 kHz thanks for your tips! i have tested the opa2604 and the LME49720 compared to the ne5532. OPA2156: Rail-to-rail Replacing the part with a more modern device could risk messing it up and ruining the performance so lose, lose. And, remember, the OPA1642 completely cured it with respect to the OPA2172, and the main difference between the two (in this context) is the input protection/DM input range. Every amp. Looks like a composite with the LMH6321 is a match made in heaven. Description: High-Performance, JFET-Input AUDIO OPERATIONAL AMPLIFIERS. As long as your not using them for military purposes. TL072 is not in the same league, I replaced those decades ago already for better performing types. 4nV/rtHz both flat. 5 V to 36 V) on 3. The microphone circuit features the Texas Instruments OPA1642 Dual SoundPlus™ high-performance, JFET-input audio operational amplifier (OPA or op amp). With OPA1632 both channels show equally low -116 dBV (non-weighted) noise while with LME49724 there is some variation in one channel. 000015% at 1kHz. 8ma quiescent current per channel - half as much as OPA2134,OPA1656 is the best boise performer now, but there many different purposes with different requirements. OPA1664. Stage 2 remains as an OPA1611, so the FB factor just increases by 6dB. This OPA1642 with JFET input achieves a low noise level of 5. Yes, the low pipe organ pedal notes down 'round 20Hz are rolled-off at 20dB/decade below that of the mid-band 1KHz level during the cutter/mastering process. These devices operate over a very wide supply voltage range of ±2. I don't care about listening tests or something else, just 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. 45 OPA1656 brings my total budget up, what, $10 all said and done? It just seems to me that the $2 OPA1642 will sound just as good as the $10 OPA827, as both specs are superb and well below the threshold of audibility. thermal noise (below for 1656): This shows that no matter the source resistance in the OPA1656, the noise will be dominated by the thermal noise of the source resistance above ~400 The OPA1652 (dual) and OPA1654 (quad) FET-input operational amplifiers achieve a low 4. Now, we run through a hand calculation to find the total noise of a simplified audio system. I have a fully The OPA1656 is the industry’s lowest voltage noise high voltage CMOS on the market. Tested a lot of OP, including LME49720, OPA1612, OPA1642, MUSES8920 and MUSES8820. the ne5532 looks a bit Jan, If you take a look at the Absolute Maximum Ratings table in the OPA1642 datasheet it specifies the input differential voltage can reach the supply voltage. “If you use OPA1656 / OPA1642, the SINAD will get 1dB to 2dB more because of fet input lower noise on higher value source resistors. Part #: OPA1642. The Stone Forge Alice OPA is an all-new hand-built, cardioid electret side-address condenser microphone that runs on phantom power. OPA1656 ACTIVE SoundPlus™ ultra-low noise and distortion, Burr-Brown™ audio operational amplifier This device offers a lower noise (4. The OPA1662 and OPA1664 series of op amps offer rail-to-rail output swing to within 600 mV with 2-kΩ load, which increases headroom and maximizes dynamic range. OPAs 1642 and 1656 MUCH MUCH better. My favorites at the moment opa1642 and this one opa1656. These devices also feature completely independent circuitry for lowest crosstalk and freedom from interactions between channels, JFET-Input Audio Op Amps OPA1642 OPA1656. Kota Depok Lisu Instrument (7) OPA1642AID Sound Plus Series Dual Opamp JFET Input OpAmp. I found its poorer sister (OPA1678) too bass light for my taste but haven't listened to OPA1656 myself. Perhaps I don't really need to roll the opamps? Too bad it is not as easy are ขออนุญาตถามต่อนะครับ sound blaster zxr อัพยังไงดีครับ Single Op-Amps (Differential to Single-Ended Converter) LME49710 Dual Op-Amps (I/V Converter) JRC 2114D ควรอัพเป็นตัวไหนถึงเหมาะครับ ตอนนี้อยากเริ่มเบาๆก่อน ดูไว้ OPA1611, OPA1612 SBOS450C–JULY 2009–REVISED AUGUST 2014 www. Find parameters, ordering and quality information The Audiophonics OPA1612 operational amplifier is based on an authentic Texas Instruments 1612 chip. 9nV figure for the 1656 is at 10kHz, not 1kHz At 1kHz voltage noise of OPA1656 is 4. The OPA1655 and OPA1656 (OPA165x) are Burr-Brown™ op amps designed specifically for audio and industrial applications, where maintaining signal fidelity is crucial. It can easily replace LM4562, NE5532 or TLE2072 OPAs, for example. 1mV) give the amplifier excellent operational amplifier DC performance. OPA1688. This OPA provides very good electrical and audio performance. OPA1641, OPA1642, OPA1644 SBOS484D –DECEMBER 2009–REVISED APRIL 2016 OPA164x SoundPlus™ High-Performance, JFET-Input Audio Operational Amplifiers 1 1 Features 1• Superior Sound Quality • True JFET Input Operational Amplifier With Low Input Bias Current • Low Noise: 5. For some reason I refuse to use it as often as I can though, being CMOS. 1piece OPA1656 OP1656 op amp Ultra-Low-Noise Low-Distortion FET-Input Audio Operational Amplifie. Then I found the OPA1642. Reactions: Euphonic_employee, Xulonn, Speedskater and 5 others. 25 V to ±18 V or 4. 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. e. 9 v/µSec for a OPA1656 at clipping(17. The OPA1642 has more open at the high frequency, it is more detail but it noticeable sharp and edgy sound. 4 Calculating Voltage Noise at the Output. The RC5534 was almost free compared with the OPA1611 and the OPA228. For additional terms or required resources, JFET-Input Audio Op Amps OPA1642 Burr-Brown™ single audio operational amplifier OPA1656 I think the problem I'm seeing with the OPA2156, and to a lesser extent the OPA1656 is that the 1/f knee for the noise is much higher than for the OPA1612 and OPA1642. Noise like scratching something or squeezing paper (which is very low frequency) can be heard if the volume Given these characteristics, there is a solid use case for my bedtime music sound profile (which can take quite few hours of listening each night)! 1656 is in my newly designated I've just started working with the OPA1642A, and I want to use it in a basic audio buffer circuit. OPA1656 : 500 uV , Here's my new circuit. TI’s OPA365 is a 2. To judge things right with the other opamps the schematic is a must. OPA1642 common-mode max positive input range is (V+ For the input buffer and preamplifier sections, a Texas Instruments OPA1642/1656 op-amp and OPA 1637 balanced drivers were employed, along with a “bootstrapped” input buffer. 1nV (typical) But the 1/f knee of the OPA1656 is much higher around 2kHz, compared to 100Hz or so for the OPA1642, which makes the 1642 a clear winner at lower frequencies. Not OPA1656. Members. Alternatively OPA1642 JFET has higher broadband noise but lower 1/F noise if that's more important to your application. Only companies. But I really like the FET's in that position. For OPA1642, the output current (limit) appears to increase with increasing temperature. I recommend not laughing at the NE5534 and the performance it achieves in the Ti PCM1794 reference circuits. 9 mA of supply current to accommodate the power-supply constraints of many types of audio products. VCM = VOUT = midsupply, unless otherwise noted. Thanks for the link. Just learned how to fix my The OPA856 is a wideband, low-noise operational amplifier with bipolar inputs for wideband transimpedance and voltage amplifier applications. ” “Regarding the sound, I think SE mode has a more pleasing The OPA1642 and especially the OPA1656 are great choices in this regard, though they are only available in SMD packages. The OPA1652 (dual) and OPA1654 (quad) FET-input operational amplifiers achieve a low 4. The schematic, spectrum and results are given below. Newer so-called audiophile op-amps have a It's not a stretch to be able to hear a difference in a 5532 and an OPA1612, depending on the gain, and how many are put together in a row. Addon BalOut has placeholder for THAT1606 balanced buffer but as can be seen from the graphs this is a serious Part Number: OPA1642 Other Parts Discussed in Thread: STRIKE. 50 NE5532 to a $2. Jan 10, 2016 #1. This OPA offers excellent performance for audio applications. But sticking an opa1642 in there could already improve things, I'd like to think there's a good correlation between good measurements and a high quality product. There's a thread on DIYaudio about the OPA1656, with a guy from TI telling very useful things. If we replace an OPA1656 instead of OPA1642. The data sheet is very handy for audio designers working with 600Ω loads, but also presents apparently conflicting specs, and lacks 2KΩ load data. HP: HD650/600, HD800, ETA Gen-G, LCD-2, JAR660 Amps: DNA Starlett, Schiit MJ1, Piety, But sticking an opa1642 in there could already improve things, I was expecting them to do a decent implementation with OPA1656 and they didn't disappoint. Now all the folks are using opa2134 op -amps as the replacement. PRODUCTION DATA. TI has characterized the THD vs Rs for a lot of its recent devices, but alas not the OPA1656 (at least that I could find). I've seen people use OPA1642/1644 a replacements for the NJM4580s and TL074s on these amps. OPA1656 is a bit noisy at low frequencies. The OPA1622 offers extremely-high ac PSRR and CMRR specifications that eliminate noise from power supplies, making the OPA1622 Hello, I'm rebuilding/upgrading a pair of blown up KRK 5 G3 monitors that I got tossed for free. This feature, in combination My goal was to send a fully differential signal down the mic cable. 2 dB at 1 kHz, while driving a 32-Ω load at 100-mW output power. Technical characteristics. Quiescent current: 3. The OPA1602 and OPA1604 bipolar-input operational amplifiers achieve very low 2. (OPA1641) and 42. ). OPA4132. Thread starter oldphaser; Start date Jan 10, 2016; oldphaser Chief Journeyman. New posts Latest activity. The OP1656 is the exact opposite, while still being detailed. From what I know the OPA1656 is currently the highest-spec audio grade standard opamp that TI offers. OPA1656 also has a pole-zero pair in the open loop gain curve to boost the open loop gain at audio frequencies (hence the 53 MHz gain bandwidth product). On the α24, this is a non-issue. With a wide supply voltage range and DIP8 mounting, it can replace many other models. THD+Noise vs Frequency 3 Description The OPA134, OPA2134, and OPA4134 (OPAx134) series are ultra-low distortion, low-noise operational amplifiers fully specified for audio applications. I have a 1988 carver stereo per-amplifier. 5 (±2. 3 nV/vHz). We add the following graph below to our audio device data sheets to show at what impedance the noise will be dominated by input current noise*source resistance vs. Help! The OPA1611 (single) and OPA1612 (dual) bipolar-input operational amplifiers achieve very low 1. To check if they will match the previous ones that were made with balanced 10x paralleled op-amps. The dual and quad versions feature completely independent circuitry for lowest crosstalk and freedom from interactions between channels, OPA1656 現行 SoundPlus Manufacturer: Part # Datasheet: Description: Texas Instruments: OPA1642: 742Kb / 22P [Old version datasheet] High-Performance, JFET-Input AUDIO OPERATIONAL AMPLIFIERS OPA1642: 865Kb / 25P [Old version datasheet] High-Perforamnce,JFET-Input AUDIO OPERATIONAL AMPLIFIERS OPA1642: 679Kb / 31P [Old version TI’s OPA182 is a Highest-precision, 36-V, 5-MHz, single, low-noise, zero-drift, MUX-friendly amplifier. 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. The GBW of the LM4558 is 5 MHz which isn't much different from the OPA1642 (GBW = 11-MHz). For OPA1652, the output current (limit) appears to decrease with increasing temperature. What about OPA2140, the non-audio / general purpose instrumentation version of OPA1642? Mouser has a bunch of stock for the SOIC-8 package. At this time I'm using OPA1602 but want to experiment with something else like OPA1652 or OPA1656. OPA1642 sucks 1. There isn't enough info about the topology of the SMSL SU-10 vs M500 MKIII vs DO300 21 vs 9 vs 11 dual op-amps OPA1612 (accoring to the spec from smsl-audio) What is the Op-amps doing in that? M500 SINAD Reviews. Is the OPA1656 the correct opamp to use? I heard it was the best so that’s Normally you'd regularily search in the manufacturers new product listings first for any new interesting products. Our audio amplifiers deliver clear sound, while enabling you to meet demanding system requirements in both industrial and automotive applications. ti. We made 10 units of the same, of which 5 units failed I have the stock opa2604's in my cd player now. com 6 Specifications 6. 25 V 2. OPA1692. I have on had 4 ad8066's that I was going to have installed and was considering the opa627's. Rp41. 9 mA per channel; The OPA1655 and OPA1656 (OPA165x) are Burr-Brown™ op amps designed specifically for audio and industrial applications, where maintaining signal fidelity is crucial. 8ma quiescent current per channel. I've been reading more and more that folks are actually modding UP to them. not going into high frequency oscillation) are different and just swapping ICs may cause problems -- you These devices operate over a very wide supply voltage range of ±2. The incremental cost of going from a $0. Buggle2 Riaa board. 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. Bipolar and JFET types so no CMOS. 1-GHz gain bandwidth product (GBWP) enables high closed-loop bandwidths in low-capacitance photodiode applications. As you point out, this is pretty common for JFET-input op amps. 00 : Crosstalk - 110dB PSRR - 80dB min, typ 100dB Distortion - 0. 8-nV/√ Hz noise density with an ultralow THD+N of –119. OPA1677. com SBOS474B –APRIL 2011–REVISED NOVEMBER 2011 ELECTRICAL CHARACTERISTICS: VS = ±2. Dec 27, 2019 #7 Lets take a look at the NE5532 op-amp, used in audio products everywhere since 1979 and it costs about a $1. Forums. The OPA1622 includes a shutdown mode, allowing the amplifiers to be switched from normal operation to a standby The original amp has the OPA1656 and the other has the OPA1642. 9nV/rtHz vs. Find parameters, ordering and quality information Other Parts Discussed in Thread: TLE2082, TLE2062, OPA2134, OPA1652, OPA1654, OPA1642, OPA1644, LM833 I need to source a replacement for 2 2134 op amps in a new preamp design. I’m going to solder the IC to a soic to dip adapter then plug it into the the amp. Last edited: 2021-09-24 10:09 pm range of ±2 V to ±18 V, on only 2. Schiit Modi Multibit v1 OPA1642 is its replacement despite the lower type number. A true FET input stage is incorporated to provide excellent sound quality and speed for exceptional audio performance. Wide supply range: ±2. The specs on the opamp are really good, almost as good as the OPA1612 (and better in some ways that will be covered below). 5nV / 16MHz / 9V/μs / 2. I am fond of the bass response and warm tone of the 2134 in my existing designs, but the new application uses phantom power which is limited to a total of 10mA TI-Produkt OPA361-Q1 ist ein(e) Videoverstärker für die Automobilindustrie, gemäß AEC-Q100 Grade 1, 3 V, mit internem Gain und Filte. 5 V to 36 V; Quiescent current: 3. 5 V (±2. It provides a very low noise density of 1. in order to resurrect those signals the preamp applies a maximum gain of 1000 b/c the basic mid-band gain must be ~ x100. OPA1656 OPA1656 is less noisy than the OPA827, 2. 75 volts). Dry, crisp, analytical and non-intrusive (as compared to the bold NE5532) is what I would describe this opamp as. Assuming the voltage noise has a white and a 1/f part, which seems to be correct, for the total RIAA- and A-weighted noise, what matters is the noise around 1162 Hz. 1 nV/√Hz at 1 kHz The OPA1622, dual, bipolar-input, SoundPlus™ audio operational amplifier achieves a very low, 2. 4. Devil is in the details - the 2. Rolling opa1642, opa1612, muses8920, 2xopa627bp, lme49720na, opa2134. It offers exceptional performance in almost any audio application. frequency plots. amplitude and THD+N vs. It has great noise specs and best of all, only uses 1. . The OPA1656 immediately raised my attention, plus there was/is a long thread about it on diyaudio. Find parameters, ordering and quality information TI’s OPA1671 is a Single supply, wide bandwidth (13MHz), low noise (7nV/RtHz), RRIO audio op amp. It might require more capacitance in the LPF of the I/V stage to keep it happy Vs the others. 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. Its lower noise than the Elantec but not as high speed so might run into slew limiting at the DAC transitions. TI-Produkt OPA1656 ist ein(e) Burr-Brown™-Audio-Operationsverstärker SoundPlus™, extrem rauscharm und verzerrungsarm. Any futher recommendations? my favs 1642/1656, 1612, lme49720na 2xopa627bp, ••• "OPA1612 vs LME49720" opamp comparison "OPA1612 vs LME49720" opamp comparison. 8 40 Reviews ౹ 155 sold. Strange but found too many times to ignore it. Safe payments Payment methods used by many international shoppers. In fact opa2156 is a opa1656 with laser trimming, better precision and the input stage changes so as to increase its slew rate depending on the signal and this is felt by the ear. That is, when you do the math, you find that 1 Other Parts Discussed in Thread: OPA1678, OPA1611, OPA1602, OPA1642. 599. Joined Sep 8, 2012 Messages 848. 1F X7R on the backside with the shortest possible lead length. 25 V to ±18 V or (4. Two schematics in parallel and eight in parallel for both 1656 and 1642 were measured. That said, a few people consder the OPA637 an 'upgrade' from the AD8620. The circ Low offset is important in audio when you don't use a servo and don't want high offset at the output . I'd prefer an OPA1642 to the OPA1656 due to lower low frequency noise. of ±2. OPA2134. For the MM design the overall gain is dropped by 20dB, 14dB in stage 1, 6dB in stage 2. the reason you need one is more for the isolation of side sounds vs the pickup in front and rear. Hi team, The following two sets of Output Voltage vs. The old 49720HA sounds more direct and dynamic than the newer SMD opamp. OPA1656: High-Performance CMOS Audio Op Amp. One thing is that TI is not sending samples when request comes from private mail services like gmail and similar. Since the OPA1656 GBW is much larger, this is the reason we suspect the issue is possibly due to stability. 5 V to 36 V. OPA1662. Stage 1 changes the The OPA1642 has much lower current noise and better 1/f noise than the OPA1656. The NJM4560DX does not appear to be FET type, though I thought a FET type like OPA1642 would suit this circuit? or maybe OPA1612 which isnt FET like the I have also tried opa1642, 1612 and 2134, but they are all slightly inferior to lm4562 soundwise in Aiyima a04. 1 Absolute Maximum Ratings over operating free-air temperature range (unless otherwise noted)(1) MIN MAX UNIT Below is a comparison between OPA1656 and OPA1642. ••• OPA1656 ACTIVE SoundPlus™ ultra-low noise and distortion, Burr-Brown™ audio operational amplifier Pin-to-pin device with higher output drive (100 mA), higher bandwidth (53 MHz) and lower noise (4. Of course there are a number of other factors to consider, like the ability to drive the input impedance of the following circuitry with low distortion levels. 124678nV(OPA1656). 004% @20KHz The above parameters are insignificant to the audio level variations imposed by substandard audio recordings, room modes and compromised 最近才在解码iv上用了opa1656，非常平衡的声音，快速清爽干净立体，细节丰富，搭配lme49710做lpf输出，非常完美。 这个opa2156参数跟1656很类似，就牺牲了些噪声等指标换了更高的压摆。音频应用其实20以上就足够有余了，就不知道这俩音色上是否跟参数一样类似？ 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. Parameter-, Bestell- und Qualitätsinformationen finden With that being said, there will not be a huge noise performance difference between OPA1656 (~4nV/rthz) vs OPA1678 (~5nV/rthz) when the thermal noise is already 11. 00003% at 1kHz. It's a killer OpAmp, and better suited to An update: The TI opa1656 stock seems to have sold out quickly, One is cheaper then the other. Joined Sep 4, 2021 Messages 9,115 Likes Dual Op-Amps (I/V Converter) JRC 2114D ควรอัพเป็นตัวไหนถึงเหมาะครับ ตอนนี้อยากเริ่มเบาๆก่อน ดูไว้ NE5534P LME49720NA/HA หรือถ้าจะเล่นตัวแรงๆไปเลย เล่นตัวไหนดีครับ The OPA1655 and OPA1656 (OPA165x) are Burr-Brown™ op amps designed specifically for audio and industrial applications, where maintaining signal fidelity is crucial. It has a very good dynamic range and a low level of harmonic distortion. Last edited: The OPA1656/1655 released after the OPA828 are also excellent enough to dispel the image of past CMOS input. The NE5532 is used everywhere as its sound profile is designed to catch people's attention. 9‑nV/ JFET-input audio op amp OPA1642-Q1 TI’s OPA1678 is a Low distortion (-120 dB), low noise (4. tnt-audio. The input is essentially shorted with 10mohm resistor in order to have a -140db control signal. Reactions: KR500 and marpe. com with a TI insider involved. I used 10 or 12 in my preamp rolling project - never a problem with The following two sets of Output Voltage vs. Current Feedback Op Amps: 30 Nov 1998: Design & development. OPA1678. The OPA1656 is probably another candidate for oscillation in this assembly OPA1656 de TI es amplificador operacional de audio Burr-Brown™ SoundPlus™ con ruido y distorsión ultrabajos. TI’s OPA1642 is a Dual SoundPlus™ high-performance, JFET-input audio op amp. 1 Absolute Maximum Ratings over operating free-air temperature range (unless otherwise noted)(1) MIN MAX UNIT 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. 00006% at 1 kHz. Manufacturer: Texas Instruments. 1/f corners: OPA1612 ---- 10 Hz OPA1642 ---- 20 Hz OPA1656 ---- 1 kHz OPA2162 ---- 1 kHz It also looks like the OPA1642 and OPA2162 are not happy driving Hi JohnC: I found this thread last night as I was going down rabbit-holes looking for newer op-amps to replace TL072's in a professional audio device that has about 18 of them in each channel. OPA1656 SoundPlus™ Burr-Brown™ Audio Op-Amplifier OP1656 SOIC-8 Texas. Over this supply range the LME49860 maintains excellent common-mode rejection, power supply rejection, and low input bias current. 3 Recommended Operating Conditions over operating free-air temperature range (unless otherwise noted) MIN NOM MAX UNIT Supply voltage, VS = (V+) – (V–) 4. I think that the OPA1656 is a superior IC to the 2134 in terms of measuring better. TI’s OPA134 is a Single SoundPlus™ 8-MHz, 50-pA, high-performance audio op amp with FET inputs. The new breed of TI J-Fet opamps offer superior performance to that old soldier the OPA2134. In particular, it has very good dynamics and a low level of harmonic distortion. 25 V to ±18 V. I am planning to replace the NE5532 in my Burson Funk with the OPA1656. Encuentre parámetros, de grado automotriz OPA1642 — Amplificador operacional de audio doble SoundPlus de alto rendimiento con entrada JFET OPA1642-Q1 Also, I typically preferred simplicity in the op amps I developed. Audiophonics is proud to present its OPA line-up with the OPA1656 based on a authentic Texas Instrument chip. If you want to know more about the OPA1656, John Caldwell from TI explained some of the design choices in the OPA1656 thread. The rail-to-rail output swing allows increased headroom, making these devices ideal for use in any audio circuit. 00005% at 1 kHz. however I cannot source an OPA164x at the moment, seems to be some kind of shortage. 000. Texas Instruments' ultra-low-noise, low distortion, FET-input op amp is ideal for audio applications such as soundbars. 00005% @ 1 kHz. OPA1656 (CMOS) on an adapter is a winner too. Meaning a dual one would use what my single OPA134 was using. We would like to show you a description here but the site won’t allow us. 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. A 1mV offset like OPA1642 ( also Jfet) = 5mV , definitely a click when relay switches. 3 nV/rtHz), higher bandwidth Apart from the tube outputs, everything runs on the +/-15 and I have not seen any anomalies. Output Current characteristic curves seem to behave in opposite We would like to show you a description here but the site won’t allow us. I definitely don't believe in the OPA1656 dream anymore haha, OPA1642 will do. It has the most stable input capacitance vs. 3nV (typical) At 1kHz voltage noise of OPA1642 is 5. Operational amplifiers (op amps) parameters, data sheets, and design resources. JFET-input audio op amp OPA1642-Q1 最近才在解码iv上用了opa1656，非常平衡的声音，快速清爽干净立体，细节丰富，搭配lme49710做lpf输出，非常完美。 这个opa2156参数跟1656很类似，就牺牲了些噪声等指标换了更高的压摆。音频应用其实20以上就足够有余了，就不知道这俩音色上是否跟参数一样类似？ Finally I decided to nest already very good TPA6120A2 inside feedback loop of another operational amplifier. The low voltage noise The OPA1641, OPA1642, and OPA1644 rail-to-rail output swing allows increased headroom, making these devices ideal for use in any audio circuit. So none of them are direct replacements as the resistances are so large and more suitable for the TL072. Like x 2; List; Last edited: Jun 4, 2021. Texas Instruments' OPA1656 Burr-Brown op The OPA1656 operates from ±2. 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. ••• Yes. The OPA1641 would be slightly better. For high source impedance sensors such as a phono cartridge lower current noise is better. Measured at non The OPA172, OPA2172 and OPA4172 (OPAx172) are a family of 36-V, single-supply, low-noise operational amplifiers capable of operating on supplies ranging from +4. 00005% G = 1, f = 1 kHz, VO = 3 VRMS –126 dB IMD Intermodulation distortion G = 1, VO = 3 VRMS I measured again the noise of OPA1656 vs OPA1642. Two cases were evalutated – in a I will show the difference between the OPA2604 vs the NE5532 OpAmp. The last one is the best from all three. 5nV/rtHz), dual audio op amp. but the difference between opa2604 and LME49720 is much smaller than the difference between these two compared to the original ne5532. Still waiting for someone to show off a CMOY with OPA1656. The OPA1641, OPA1642, and OPA1644 rail-to-rail output swing allows increased headroom, making these devices ideal for use in any audio circuit. He suggested to buy the parts direct from TI. Output current. 25 V to ±18 V 0. 9 mA per channel. The OPA1641-Q1, OPA1642-Q1 SBOS791A –JUNE 2017–REVISED NOVEMBER 2017 OPA164x-Q1 SoundPlus™ JFET-Input, Automotive-Grade, Audio Operational Amplifiers 1 1 Features 1• Qualified for Automotive Applications • AEC-Q100 Qualified With the Following Results: – Device Temperature Grade 1: –40°C to We tried OPA1612, OPA1656, NE5532, and Muses 8920 opamps in Rohm BD34301EKV Evaluation Board (which came with 5532's installed). Especially the last one seems promising but first I need better test equipment to analyze such small distortion levels. The OPA1611 (single) and OPA1612 (dual) bipolar-input operational amplifiers achieve very low 1. Regular Contributor; The only thing worth noting is that his "recommended op-amps" section is inevitably outdated- the OPA1656 has only been out for a year or two, The OPA1641-Q1 (single) and OPA1642-Q1 (dual) series are JFET-input, ultra-low distortion, low-noise operational amplifiers (op amps) fully specified for audio applications. consists of 2 x 10 op-amps in parallel and the two 10s are balance connected. Find parameters, ordering and quality information This OPA1656 OPA from Texas Instrument offers very good performances for audio use. I've done this with older parts for years (LM833, TL072, etc. OPA1671. Device Information PART NUMBER CHANNEL PACKAGE(1) OPA1655 Single D (SOIC, 8) DBV (SOT-23, 5) OPA1656 Dual D (SOIC, (8) 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; Audio op amps. Furthermore, this OPA features rail-to-rail output switching at Aliexpress seller 1 Seller 2 (zoomed out, not to scale anymore) for comparison, a genuine OPA1656 Ti NE5532 TL072 . Marketing 101 by The OPA2156 is a new, high-performance op-amp from TI. More suggestions: OPA1678 - 4. 6. 1-nV/√Hz and an extremely low distortion level of 0. OPA2132. OPA1611 might suit yes. The OPA827 for example has superior load drive,much lower distortion and miniscule DC offset. 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. This devices offers very low offset voltage (±25 µV), drift (±0. I'm parametric-filterHigh-speed op amps (GBW ≥ 50 MHz) Compare products TIcom It has the most stable input capacitance vs. OPA1602 OPA1604 www. 25) 36 (±18) V Specified temperature (SOIC)(1) –40 125 °C The OPA1641 (single), OPA1642 (dual), and OPA1644 (quad) series are JFET-input, ultralow distortion, low-noise operational amplifiers fully specified for audio applications. The OPA1641-Q1 (single) and OPA1642-Q1 (dual) series are JFET-input, ultra-low distortion, low-noise operational amplifiers (op amps) fully specified for audio applications. But more importantly, it's CMOS. Taking advantage of a wide power supply range and mounted on a DIP8 bracket, it can replace many other models. We are also using Hi all, Tried few OPAMPs myself in I/V, LPF, VAS and BUFFER stages with my Essence One DAC/headamp, like: NE5532, LM4562, NJR2114, OPA1602, LME49720, MUSES8820, MUSES8920, OPA2604, OPA1642, OPA2132PA, AD8672, AD8599, MUSES01, MUSES02. I will just buy the cheapest. OPA1656 rolling I tried in all cases to bypass the rails with a 0. I got 1,000 x LME49720 DIP (USA) in Oct 17 (panic buy due to phasing out). I had no oscillations or instability with the OPA1656. molcm eejrzio qedy aahe dvxn stx nkey iqndv mhrt qbmiv  »