Opa1656 vs lm4562 specs

Opa1656 vs lm4562 specs. Z. My personal OP amp preference for the Fosi V3 are Ti OPA1656 but others have different preferences. 5Vrms, Gain=1 and Load=2k The INA851 specifies THD+N at -110dB @ 10Khz and at a BW of 500Khz. georgehifi. Is the 2134 the right choice. This is just a theory. OPA2134 and a few others. I agree though I am able to see minute differences in trend between OPA1656 and LM4562 since I have 8 channels each to measure. 3nV/rtHz @ 1kHz). Which is what the ear likes. 1 with OPA1656) - concerning the overall listening, I think that we are rather on amps of the same range, I found the 3E Audio a little less "alive" than my AIYIMA but I think that the OPA1656 are there for something (I did not test the 3E Audio + OPA1656). Aiyima have confirmed they are the same analog linear potentiometer as the V3 but the sensitivity of the A07 MAX is twice that of V3, so while the A07MAX volume is nicer than previous Aiyima Amps but IMO the volume on This is my first time doing anything DIY with audio. I didn't investigate further, and I didn't have the OPA1656 nor the 1642 to try. I had other opamps, but Another interesting thing is the NJM4562 used in the 122 mkII is not the same as a LM4562. 9 mA of supply current to accommodate the power supply constraints of many types of audio products. Texas Instruments TPA3255, digital audio amplifier BTL bridge power output 300W * 2 channel design, THD less than 0. But the only REAL advantage of an FET 1656 over the bipolar 4562 is much less CURRENT noise---so any application with a source impedance of ≥3KΩ will have lower noise with the 1656. Both LM4562 and LME29720 are audio operational amplifiers these would be OK for mic pre-amp application. Goggle bill d mod carver c-1. The Texas Instruments OPA1656 has a specified temperature range from –40°C to +125°C and is offered in an 8-pin SOIC The NE5532 was really good for its time but has been superseded by quite a few opamps since then. Presentation : All of SparkoS Labs OPAs are bases on Lin 3 Stage topology consisting of an input stage differential pair, a gain stage (VAS) and an output stage, all biased in Class A with two pole compensation. xlsx. SPECS THAT MATTER. But then the 2068 measures in the same league in this application, but SQ wise not in the same league at all imo. I have a 1988 carver stereo per-amplifier. The LM833 was released way more than 20 years ago, and if memory serves, OPA2134 was released around the The specs also list a healthy increase in output power with a stouter power supply. Normally, that's not newsworthy because higher performing parts are coming out all the time. MUSES8820 is the best, IMHO. To OPA1656 ACTIVE SoundPlus™ ultra-low noise and distortion, Burr-Brown™ audio operational amplifier SoundPlus™ audio op amp with wider bandwidth and lower noise. Just looking at the specs, posted on December 2, 2010 at 16:16:11: Brian A Audiophile Posts: 6206 Joined: July 19, 2000. USB Receiver: C-Media CM6635. 2. Now, we run through a hand calculation to find the total noise of a simplified audio system. But more importantly, it's CMOS. As a result, the mids are pushed back a bit. Opa1656 has good phase response at high frequency. You can replace NJM2068 by LM4562. Output Stage: TI OPA1656 (4 amp stages per channel) Power Supply: Via USB, with +/- 12V rails via high-current dual-polarity switching regulator, with inductor Manufacturer: Part # Datasheet: Description: Texas Instruments: LME49722: 195Kb / 13P [Old version datasheet] High Performance, High Fidelity Dual Audio Operational Amplifier LM4562: 1Mb / 42P [Old version datasheet] Dual High-Performance, High-Fidelity Audio Operational Amplifier LME49720: 1Mb / 40P [Old version datasheet] Dual High LM4562-+ LM4562 10pF + + INPUT OUTPUT 47 k : 150 : 3320: 909 : 26. 5Vrms signal, 80-kHz measurement bandwidth It has the most stable input capacitance vs. I was comparing the TI datasheet for the LM4562 (which is spec'd per package) with the TI datasheet for the OPA1656 (which is not). The OPA1656 is a Burr-Browntrade; operational amplifier (op amp) designed specifically for audio and industrial applications, where maintaining signal fidelity is crucial. It is true, not every time op amp change is positive, there can be some things in schematics we dont know but generally yes. All are direct replacements, nothing else need to be modified. Both are The LM4562 is an excellent op amp for audio applications and is one of the more reasonably priced. Specifications; Product type: OPA: Number of channels: 2: Supply voltage range: 4. If it is well implemented, non prone to oscillation, with high input impedance and within supply specs, it should work well. 0005%, 20Hz-20KHz, at 2V RMS based on OPA1656/OPA1678 Gain: 10dB referenced to mains Output Impedance (line out): 75 ohms. I tested a few in both units and the Opa1656 and opa1612 without tweaking have better performance than almost any discrete solution. 100 Ohm - 100 kOhm, 3). I had oscillation afterwards and had to 1. 0008%, CCIR SNR: >112dB referenced to 2V RMS Topology: based on OPA1656/OPA1678 Gain: 10dB referenced to mains Output Impedance (line out): 75 OPA1656 OPA1656 Shutdown: No Shutdown No Shutdown SR - Slew Rate: 24 V/us 24 V/us Standard Pack Qty: 2500 75 Technical Specifications Product Description Links (Datasheet, Catalog, etc. Opamps don't in general draw constant current vs signal so to keep power rail noise as low as possible, arrange for the lowest impedance power and load them as lightly as practically possible. 000196% I recently learned that an OP-AMP called OPA837 was released. NJM4580 requires more care, usually a high-current not-too-fast FET opamp is suitable. Looking at the datasheet it should be working for my purpose. The OPA1656 and the OPA1612 are probably The LM4562’s superior audio quality may be preferred in critical listening environments or high-end audio systems. I really like A quick snapshot of the OPA1656 performance specs: 2. 5 V to 36 V) on 3. Figure 3-4. I no nothing about this. It has a very good dynamic range and a low level of harmonic distortion. 01%, 10V step vs 1. I may also swap in some LM4562 Op-amps I have. Replace your current fake* NE5532 Op Amps with real Op Amps like the OPA1656. Now all the folks are using opa2134 op -amps as the replacement. Output Stage: TI OPA1656 (4 amp stages per channel) Power Supply: Via USB, with +/- 12V rails via high-current dual-polarity switching regulator, with inductor I can find a lot of information regarding op-amp recommendations for use in voltage amps and output stages, but little about choosing them for I/V. 9nV/√ Hz 的低电压噪声密度和 6fA/√ Hz 电流噪声密度，能够在各种电路内将噪声降到超低。OPA165x 采用高带宽和高开环 Still you have to keep in mind that some of these IC's - due to different specs - may cause oscillation problems or can put your PSU in to shock. Find which one's for you! I agree though I am able to see minute differences in trend between OPA1656 and LM4562 since I have 8 channels each to measure. They also have a lower supply current than the 072 series making them NE5532 is dual channel opamp, so you can try few of these: opa2134, LM4562, opa1642, opa1656 without burning too much money on rolling opmaps. The OPA165x operates over a very wide supply range of ±2. Recommended Posts. Find parameters, ordering and quality information. com SNAS326K –AUGUST 2006–REVISED DECEMBER 2013 LM4562 Dual High-Performance, High-Fidelity Audio Operational Amplifier Check for Samples: LM4562 1FEATURES DESCRIPTION The I was searching for another chip and I found OPA1656. ••• TI’s LME49860 is a 2-channel, 44-V, high-fidelity, high-performance audio op amp. 1 Absolute Maximum Ratings over operating free-air temperature range (unless otherwise noted)(1) MIN MAX UNIT Supply voltage VS = (V+) OPA1655 和 OPA1656 (OPA165x) 是 Burr-Brown™ 运算放大器，专为音频和工业应用而设计，在这些应用中保持信号保真度至关重要。FET 输入架构可达到 2. 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 In the discussion, @AnalogSteph stated "With this circuit I would explicitly condone opamp rolling. Buggle2 Riaa board. While these levels are ideal for low gain amplifiers, such as the The LM4562's outstanding CMRR (120dB), PSRR KEY SPECIFICATIONS (120dB), and VOS (0. There are a few 5532's in the unit too-primarily as input and output stages, and am considering replacing with Try some Opa1656, LM4562, Opa627, AD8066 etc. My devices have 40dB more open loop gain than the OPAs (140dB vs 100dB) Keep in mind, this is not a 40% increase in gain due to the logarithmic nature of dB's. star =Top documentation for this product selected by TI. 16V into 300 Ohms and the graph stops at 12V into 220 Ohms. 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. The datasheet of the LM49720, May 2007, seems identical on all Specs. 1 is now ready with OPA1656 in DIP8 socket. Any chance you have some measurements of the OPA1612 compared to the Sparkos SS2590 for the regular dual mono? I was also curious how many of the SS2590 opamps are 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 OPA1656 immediately raised my attention, plus there was/is a long thread about it on diyaudio. LM4562 max safe current (11MHz vs, 55 MHz)---thus much less chance of oscillation in vintage circuits. Dual customzied solution will give unmeasurable distortion My OP1656 OpAmp Review. I have a circuit with two OPA1656's and it so happens that one offset is subtracted from another and almost cancels - in LTspice. I personnaly tested the Aiyima A04 (I mean the Tilear R 2. Content is provided "as is" by TI 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, The setup : Pioneer DVD player > SPDIF digital out to Zhaolu V2. Pardon if any of the following has been covered. LM4562 3. Farnell was selling 33078 in singles for $. Any chance you have some measurements of the OPA1612 compared to the Sparkos SS2590 for the regular dual mono? I was also curious how many of the SS2590 opamps are With the T8 , Aiyima offers a versatile unit that is a tube preamp, headphone amplifier and DAC at a very affordable price. Measured at non-inverting gain 40dB and 3. Composite amplifier is one of the The latest op-amp that I am still using until now is LM4562. 75Vrms levels. My history with Burson LME49860, LME49860MABD, LME49860NABD SNAS389C – JUNE 2007– REVISED APRIL 2013 www. 99) Blood Wood (+$69. This makes dv/dt (aka slew rate) = 24. Finally I decided to nest already very good TPA6120A2 inside feedback loop of another operational amplifier. 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. Frequency Response: 20Hz-20Khz, +/-0. The idea of this group buy is to propose a full pack @fair price for a brand new Purifi Buffer : SPEC : - THD: 0,00026% @ Vin 2,5 V RMS - GAIN: 14 dB - BANDWIDTH: 2 Hz - 150 kHz - SLEW RATE: 24 V/uS - CMRR: > 100 dB @ 60 Hz Oh I don't disagree now that I look closerI just got caught up in rushing. OPA2134: OPA2134 VS OPA1656. I thought it was a non OPA1656 SoundPlus? ultra-low noise and distortion, Burr-Brown? audio operational amplifier. I swapped out ST33078 for 4558 in my disco mixer (used to play LP's at 50x gain) and there was a noticable decrease in hiss. It provides lower noise, better channel separation, and improved input/output voltage I found that these two ICs had similar parameter, but some difference: OPA2134: lower noise(8nv, 2604 is 10nv), lower distortion(0. 1 uf cap on the power supply near the IC, to prevent oscillation, so figure that into your costs. It was designed (as of course were others) for audio and differs in that the distortion spectrum it produces has the even harmonics predominating. You have to try it yourself to hear the difference, because the measurement advantage is very small, so it should be non-audible , but it is not. brjoon1021 Member. Although the 4558 says it is 'electrically similar' to the 741, it's clearly not two 741s in a dual package. The NE5532 is perfectly fine. r/audiophile is a subreddit for the pursuit of quality audio reproduction of all forms, budgets, and sizes of speakers. LM4562MAX/NOPB Texas Instruments Audio Amplifiers 2-channel, 55-MHz, high-fidelity, high performance audio op amp 8-SOIC -40 to 85 datasheet, inventory, & pricing. 1 to 24/192. Of course. 9‑nV/√ Hz voltage noise density and 6‑fA/√ Hz current noise density, allowing for very-low noise performance in a wide variety • audio·phile: a person with love for, affinity towards or obsession with high-quality playback of sound and music. 5V to 36V: Slew rate: 24V/us: THD+N @ 1kHz: 0. the AD797, but still worth a check for DIY-ers. My first set of separate OpAmps, ushering my foray into the brave new world of OpAmmetryLoL Dry, crisp, analytical and non-intrusive (as compared to the bold NE5532) is what I would Which of the two mentioned OP Amps (OPA1612 or OPA1656) is the better one, in a scientific point of view. Try some Opa1656, LM4562, Opa627, AD8066 etc. I am planning on modding a DAC that uses stereo differential current output, with the I/V conversion serviced by 2x NE5532 dual op-amps. So I don't think there is a singular correct answer. put disk caps (0. With Phono PreampsLME49710 /LME49720 TO-99, metal can. Total Noise of OPA1656 vs OPA1612. Hel 2 uses the AKM AK4490 D/A converter with TI OPA1656 based filter stage and an output with 4 amp stages per channel. Technical documentation. There is a 3 to 4 improvement in the typical slew rate for instance, always a weakness with the 741. A-weighted, referenced to 2V RMS Topology: based on OPA1656/OPA1678 Gain: 0dB in absence of processing, up to 12dB with processing Output Impedance (line out): ESS ES9018 with LM4562 I/V and filter stages. 1mV vs +/- 0. When I tested OPA827 vs. and you clearly hear the difference! When changed to Opa1656 in headphone amp which had 5532 before i was like "wow!", that is clear and nice sound. But I tried to use it in DAC output (LPF circuit) in 2 Overall, the NewClassD is a lot more V shaped, with emphasized bass with a lot of detail in the upper mids and treble sections. Case Type * Aluminum . -3dB at 80 Hz THD: <0. The LM4562 will improve the performance measurably as it has much lower THD OPA1656 1/2 OPA1656 Input Output Pad Product Folder Order Now Technical Documents Tools & Software Support & Community 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. the default NE5532 OP amps supplied) and have - alternatively - a look at some of the rather We would like to show you a description here but the site won’t allow us. The op amp offers a temperature range of -40°C to +125°C and is available in an 8-pin SOIC package. This leads me The OPA2156 is a new, high-performance op-amp from TI. 9nV/rtHz broadband voltage noise. The data sheet is very handy for audio designers working with 600Ω loads, but also presents apparently conflicting specs, and lacks 2KΩ load data. 1 version) which is the best version with Elna caps + these OP amps : - Burson V5i (they are more expansive than the amplifier itself) - OPA1622 - OPA1612 - OPA627 - OPA1656 - Muse 01 Keep on saying that OPA1656 provide me the best results (excellent sound stage, dead silence . 5V to ± 17V • THD+N (A The LM4562 has a wide supply range of ±2. The first one is sounding warm and innofensive, and the LM 4562 is cleaner and leaner. It's a jack of all trades so to speak, and this is the op-amp I was able to compare and contrast the V6 Classic to. X-fi Prelude' comparison a few threads down and I basically concluded from that the AD8620 might be considered better than the default LM4562. The LME49860 is another option. 83 k : 100 : 150 : 22 nF//4. HOWEVER. The amp Hi Folk! Is the LM4562 really good at DAC output use? Or its spec need a special design for best use? For testing purpose, I installed this op-amp in different equipments. Below, I have highlighted the components that could be adjusted if this the issue. 1 kOhm - 1 MOhm 4). Good noise specs! ••• More Joined 2012. 9 mA of supply current to accommodate the power supply So considering NE5532, LM4562 and OPA2134, OPA2134 gives best measured results in AIYIMA A07. Here is a copy paste of the result for OPA1656 OPA1656 In the past I have to say I prefered widely the AD precise sound vs the softer traditional TI sound. Since I am not interested in the V6 Vivid Dual that it comes with. Part #: OPA1656ID. TomJ Active Member. 03% when working continuously Amplifier chip: TPA3255 Output power: 300W+300W Number of channels: hence, once you have a LM4562/LME49720 or a OPA1612 I would not worry, the circuit around is what makes a bigger difference. 00006% at 1 kHz. 1) Can I replace the LME49710 / LM4562 referred to in the report with the OPA1656 without changing any of the values in the circuit design in thanks for your tips! i have tested the opa2604 and the LME49720 compared to the ne5532. Your ears are the best measuring device for what you hear and enjoy. Reactions: DavidTT and imral3. Help! Specs FAQ Reviews Downloads. The circuit with the values shown Just replace the original op-amp with one with a similar specification, if it's not possible to find an exact replacement. Sample Rates and Bit Depths. Note to self: don't do that. Content is provided "as is" by TI and community contributors and does not constitute TI specifications. 3 V/us, just near the opamp specs. Over this supply range the LM4562’s The ones I subbed were LM4562's, which work fine with the Aiyimas. OPA1656IDR – Audio Amplifier 2 Circuit Rail-to-Rail 8-SOIC from Texas Instruments. Best Regards, Chris Featherstone Before I got an AP I used a Boonton 1120 -- same story -- the NE5534 in the oscillator couldn't be beat. The OPA2064 is definitely more musical sounding in my experience compared to many others. Reply. I hesitate to recommend those without simulating the circuit. I've had an OPA1612 lose its mind in a filter circuit where an LME49720 worked just fine. When both amps at Vout=3. I have tried muse02, muse 8920 didnt feel they were worth the hype or price. That’s Syn. Other cheap ones on my radar - OPA2134PA, OPA1612, LM4562NA. 25V to ±18V or (4. I’m going to solder the IC to a soic to dip adapter then plug it into the the amp. 144dBc=0. Hi there probaly a simple question maybe not. Co-Browse. 11, Airport Express, Beresford TC-7520 (Dual LM4562NAs) MLC5/6 clipped, 36K and 100nf cap mod, Behringer EP2000, Cambridge Soundworks Tower II Sure it does but it says it with a graph. 0. Mar 13, 2020 #1,328 rodtor said: 1. On top of this I would place the decompensated op-amps, when you fine tune their feedback and/or custom compensation loops, they outperform even the AD797BRZ pair. LM4562 SNAS326I – AUGUST 2006– REVISED JANUARY 2010 www. Gallery Archive Articles. The FET The LM4562 A07 does work really well if you feed it with a good preamp like the Aiyima T6 Pro which also is flexible when it comes to op amps. 59 If my LM4562 works under perfect conditions, it might be hard to beat this in my dac. Central Scrutinizer. The LM4562 has lower typical input offset voltage than the OPA1656 (+/- 0. New BUF634A has higher slew TI’s OPA1656 is a SoundPlus™ ultra-low noise and distortion, Burr-Brown™ audio operational amplifier. 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. 25 V to ±18 V or (4. " Let's test this out! AnalogSteph had recommended the OPA1656. Even more expensive, OPA1656 / OPA1612 / Burson V5i / OPA627 / Genuine NE5532 / Genuine Muse 02 / 0PA1622 / OPA1642 / OPA1602 OPA1656 - Better imaging / separation of instruments. 9nV/rtHz broadband voltage noise; 6 fa/rtHz broadband current noise-131 dB THD+N at 1kHz, 600 ohm load, 3. pma Major Now the interesting question is why would the LM4562 be that much more sensitive The OPA165x operates over a very wide supply range of ±2. The low voltage noise combined with the low current noise make this device great for low and high impedance applications such as a high gain microphone pre-amplifier. For the case of Marketing 101 by having one of the engineers on the diy threads because it creates interest (especially from spec crazy diy-ers who “need” the lastest and best specs and use “word of mouth” via the audiophile threads to push cost up by popular demand) They do outsource them to official distributors ie Mouser, Digi-Key but you have to buy For a fun datasheet exercise compare the LM4562 and Ti OPA1611/1612 current noise versus the NE5534 and OPA228 current noise. Posted March 22, 2022. Reactions: rodtor, TomJ and Julf. • Power Supply Voltage Range: ±2. The LM4562 has slightly worse noise and distortion measurements than the OPA1612, but the difference is so Hello, i just compared my current favourite opamp opa1656 vs the much older opa627 (its a dual module from audiophonics, the IC`s are "used" if this matter but as long they function correctly i only see the benefit of them being already burned in ) i tested these with the Aune X8 XVIII on first sight i would say the opa627 has these attributes The OPA1655 and OPA1656 (OPA165x) are Burr- Brown™ op amps designed specifically for audio and industrial applications, where maintaining signal fidelity is crucial. Can I please ask two questions. The LME49860 is great, something between the thickness of the LM4562 and the cold neutrality of the LME49720. USB Playback: 16/44. Roberto . TCD333 Member. 1 k : 3. This was modulated by 2 and the availability of OPA1612 and OPA1656. Quick specs: 2. Takes an additional 0. 4Vp-p output. LM4562 has a wide supply range of ±2. Model : AIYIMA A07 MAX Product name:A07 MAX TPA3255 Power Amplifier Stereo Max Output Power(switch stereo mode)：300Wx2 / 4Ω（48V/12A） Mono Max Output Power(switch mono mode)：600W/ 2Ω（48V/12A） (R+ connect to speaker +, L+ connect to speaker -) Working Voltage：DC24-48V，5A or more Replaceable 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, Part Number: OPA1656 Other Parts Discussed in Thread: LM4562, Hello, I am designing a phono pre-amp and found application report SNAA046A–July 2007–Revised May 2013. T. but the difference between opa2604 and LME49720 is much smaller than the difference between these two compared to the original ne5532. Here are the measurements of the dual mono and with different op amps (Sonic Imagery 994, OPA1656, LM4562). I repeated measurements a few times, using sets of resistors: 1). 5V to ±17V. There isn't enough info about the topology of the I´m afraid the specs make it a bit difficult to compare. The 4558 won't get any prizes for output current. Last edited: Feb 24, 2019. Input buffer and 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. Wood . THD=-114. European Style . Main L/R. これが使えるならば、さらにデータ上は上位のths4651がいけるのでは？と思い、交換してみたところバッチリでした。解像度、空気感、柔らかさがmuses01、lme49990よりも良く、好みの音です。opa1656が最新でスペックの高さが評判でしたので、最初は期待し 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. Put disk caps across the feedback resistor (22 pf). ) Product Image Other I usually pad my Mouser orders with a couple of OPA1656's and/or OPA1641. And this preamp sounds MUCH better than Audio Research, Burmester and Accuphase preamps costing above €10. Hi Ryssen, Having had a quick look the data sheet of the LM4562 August 2006 and of the LM49860 June 2007, the differences I detected were at the end of the documents : no mention of "banned substance compliance compliance" at the end of the LME49860 datasheet. Having LM4562 in both amplifiers and they start to sound the same. 0008%, 20Hz-20KHz, at 2V RMS IMD: <0. The headphone amplifier is based on the integration of the MAX9722 chip, which allows it to provide 120 mW of power SPEC : Audio input: Bluetooth / USB 5x OPA1612 + 2 OPA1656 (for XLR outputs). 5532 or TL072 might need the caps, too, the Of course. this amplifier when properly redone sounds fantastic i have a pair of c270 which i own along with many other NAD amplifiers these are the cleanest and definitely the most powerful of the ones i own their sound is slightly warm not as warm as 3155 but very detailed and dynamic sounding far above their pricepoint Please take a look to the attachment. IMHO the outcome was mostly decided by how the opamps responded to the RF coming out of the dac chip. The OPA1612 has great specs at or below 1 KHz but "breaks down" by 10Khz and above. Datasheet: 611Kb/23P. 5mV). Happy listening as always and experiment for yourselves. It is absolutely hopeless otherwise. Volume control on the V3 is more subtle control over lower volumes. Over this supply range the LM4562’s input circuitry maintains excellent common-mode and power supply rejection, as well as maintaining its low input bias current. We also have discrete JFETs now that can be paired with any op-amp to provide high input impedance and low noise with flexible biasing. Eric Mo Intellectual 775 points Part Number: OPA2134 Other Parts Discussed in The OPA1656 is a newer device with better typical room temperature specifications in regards to the following: Test: OPA1656: OPA134: GBW: 53MHz: 8MHz: Slew Rate: 24V/us: 20V/us: PSRR: 0. Heard it all here with different LS and poweramps. An OPA1612 has slightly better specs than an LM4562---less noise and distortion, faster, and more output voltage swing. Reviewed Nov 26th, 2022 by . The sound difference after using NE5532P to this LM4562 is The OPA1655 and OPA1656 (OPA165x) are Burr-Brown™ op amps designed specifically for audio and industrial applications, where maintaining signal fidelity is crucial. I'd go with the LM4562 (= LME49720) instead. In the meantime we will wait for the customers feedback on the component values in order to check the stability of each op amp below using the OPA1656. Ha ha it's funny because I'm a wide and far reached detailed and accurate fanboy and some people find too many details to be annoying. When we The OPA1656 operates over an ultra-wide supply range of ±2. Electrical Characteristics for the LM4562 (Note 1) The following specifications apply for the circuit shown in Figure X. 1 uf) across the power supplies near the IC's 2. Sample Rates and Bit 16/44. Sets 2-4 shows almost the same: SPECS THAT MATTER. Last edited: May 23, 2018. However the next upgrade project will be a Rotel RA-930AX integrated amp and I will not try to change its voltage. Below is a comparison between OPA1656 and OPA1642. I downloaded the pspice model but it doesn't work as I expected. Tested a lot of OP, including LME49720, OPA1612, OPA1642, MUSES8920 and MUSES8820. com and all are unity gain stable. I'd be curious if the new-er opa1656 doesn't beat the NE5534 in almost every one its edge cases (namely, it's rather nice output stage) -- the low distortion oscillator thread makes a case New Purifi Buffer in V2. Michael3271. consists of 2 x 10 op-amps in parallel and the two The combination of OPA1656 as U1 and LM4562 as U2 gave the lowest measured noise, but there was a negligible audible difference when the LM4562 was replaced by a NE5532. 25V min / BJT - pretty good. Aluminum Case Color * Wood Type * Beech Wood (+$49. The specs on the opamp are really good, almost as good as the OPA1612 (and better in some ways that will be covered below). You don't have to use SA, distortion level obvious on oscilloscope screen. The schematic, spectrum and results are given below. 9‑nV/√ Hz voltage noise density and 6‑fA/√ Hz current noise density, allowing for very-low noise performance in a wide variety of circuits. are clearly better, quieter. This device is ideal for low and high impedance applications, such as a high gain microphone pre-amplifier, due to the low voltage and current noise. ••• SparkoS Labs Technology. Here is a nice link on the current- and slewrates for some of these opamps They also have lower THD and noise is 5. I would check the amp out, if its character is basically to your liking (incl. We are also using SoundPlus? ultra-low noise and distortion, Burr-Brown? audio operational amplifier 8-SOIC -40 to 125 OPA1656 is an audio operational amplifier featuring ultra-low-noise and low distortion. 3uV/V = 130dB: - LMP8672 (probably discontinued) - OPA1612 (which is barely available in SOIC8 at the moment) - 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 ( not a Aiyima a04 with LM4562 is more dynamic, goes deeper in the bass and sound clearer. It sounds awesome, for the price it is a must have ! LEAF Dual 9038Q2M VS Gustard X16 pictures inside ) diyAudio Community diyAudio Store. This feature accommodates the power supply constraints of many types of audio products. 5 V Current Input (all pins except power-supply pins) –10 10 mA Output short-circuit(2) Continuous Temperature Operating, TA –55 125 °C One of the problems of the 741 was its lack of specifications, and relatively high noise. For example 100 dB corresponds into a gain of 100 thousand for the OPA, and 140 dB corresponds to a gain of 10 million for the SS3602. LM4562 Units Symbol Parameter Conditions Typical(3) Limit(4) (Limits) AV = 1, VOUT = 3Vrms We tried OPA1612, OPA1656, NE5532, and Muses 8920 opamps in Rohm BD34301EKV Evaluation Board (which came with 5532's installed). Audiophonics uses TI-LM4562 by default, which on paper has slightly lesser specs than the OPA1612 and OPA1656 which are used in the other custom implementations (EVAL, VTV, Neurochrome, BoXem etc). OPA1662, OPA1664 PARAMETER CONDITIONS MIN TYP MAX UNIT AUDIO PERFORMANCE The OPA165x operates over a very wide supply range of ±2. The latter is a 2007 design with more modern specs and what they call a voltage feedback architecture. 25 V to ±18 V 0. Dec 29, 2023 #85 Thank you . Last edited: Dec 29, 2023. 9mA of supply current. B. Joined Sep 16, 2019 Messages 129 Likes 178 Location Palo Alto CA. To utilize AD8620 requires some knowledge on the circuit. The FET-input architecture achieves a low 2. Not only was that 3e AUDIO TPA3250 - сравниваем разные ОУ - OPA1656, OPA627, Muses01, Muses02, VV4ЖМИТЕ НА КНОПОЧКУ "СПАСИБО" ДЛЯ СЧАСТЬЯ!!Понравилось 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). LM4562 is a Dual High-Performance, High-Fidelity Audio Operational Amplifier IC. Find parameters, ordering and quality information The OPA1656 is the new kid on the block, and has the most impressive data sheet specs. Discrete vs IC I also like larger discrete op amps over IC or regular types. ) Product Image Other THD+N Ratio vs Output Amplitude Functional Block Diagram 1 An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications, 6 Specifications 6. Pricing and Availability on millions of electronic components from Digi-Key Electronics. 2) Buy a real Meanwell 24v PSU, (If I am not wrong OPA1656 is a really modern OP Amps from March 2019 vs 2017 for the OPA1692). The OPA1656 has lower typical settling time than the LM4562 (800nS to 0. All op-amps in this test are DIP except the OPA1642 is in SOIC One can almost not find two more different sounding IC:s. OP . amb Site Admin Posts: 12153 Likes: 285 posts Liked in: 766 posts Joined: March 30th, 2010, 5:49 am Location: Sunnyvale, CA Order today, ships today. which is just a single input pair with a charge pump to achieve rail-to-rail input specs, With the LM4562 installed I was able to reinstate the recommended RIAA equalization (that is restoring the recommended overall gain) and the sound quality and relatively high level of detail indicate the distortion is quite low. Member; 6. 9 nv/rtHz) but much lower 1/F noise so the difference, even A weighted, between the two is not so much, but is still a bit better for the OPA1656- but the OPA1656 only comes as a dual and is not suitable for use in the earlier version boards. 3k Region: Australia Location: Manly NSW 6 Specifications 6. Every amp. V S = ±15V, R L =2kΩ,R SOURCE =10Ω,f IN = 1kHz, and T A = 25˚C, unless otherwise specified. 000029%: Operating temeprature range-40°C / +125°C The LM4562's outstanding CMRR (120dB), PSRR KEY SPECIFICATIONS (120dB), and VOS (0. Some will point out the OPA1612 (which is even better) or the OPA1656. No results found. I have some experience swapping ne5532 in Aiyima amplifiers to opa 1612 and lm4562, and I think the bass dynamics is slightly better with lm4562, and the soundstage more exact with opa1612. The OPA1655 and OPA1656 (OPA165x) are Burr-BrownTM op amps designed specifically for audio and industrial applications, where maintaining signal fidelity is crucial. LM4562 would be my first choice based on op-amp rolling a CMoy back in the day. I prefer the opa2211 over the opa1612 (same chip but with less better specs). Also comparisons of the OPA627 and OPA637 would be good. Detailed Specs Case Details Measurements Drivers User Manual The J2 Socketed Some will point out the OPA1612 (which is even better) or the OPA1656. However a pair of the AD797BRZ is slightly better, just slightly. 2) Buy a real Meanwell 24v PSU, then adjust the voltage all the way down to roughly ~21. This chip doesn't fit in the common DIP8 packaging, but thankfully @Audiophonics sells a pre-modified OPA1656 for 5 €. ti. 0003%); OPA2604: high slew rate(25v/us, 2134 is 20V/us), high bandwidth(20M, 2134 is 8M) In Active Xover, there are input buffer, filter, output with gain changing. What VS AIYIMA A04 (black PCB Tilear 2. The NE5532A is an improved version of the NE5532, offering enhanced specifications and performance. Home Amplifiers. 99) Canary (+$89. 4. lol My benchmark standard op-amp is the OPA1656 which is not the widest sounding, but it's tight, somewhat linear and has a good balance to the sound. The amp Talking about noise, the OPA1641 has higher 1kHz voltage noise than the OPA1656 (5nv/rtHz vs. 1 to LM4562 3. Can you please show the THDN plots at 10kHz or 20kHz? Thanks! Reactions: outfaced. 5nV / 35MHz / 20V/μs / ±2. They are guidelines at best. They are always in stock, and I always have a buffer. The stage is as wide as the other 2 opamps, with lower current draw ( the XD05 did not go into protect mode even on very high volumes with high gain and high bass). 1. With dual 15 Volt supplies it will do 28V into 10K, 25V into 1K, 22V into 500 but it's falling off a cliff now. OPA1656ID – Audio Amplifier 2 Circuit Rail-to-Rail 8-SOIC from Texas Instruments. 5V to V = 1, VOUT = 3VRMS, fIN = 1kHz) ±17V. . 4 Calculating Voltage Noise at the Output. 5 DAC > analog out to Creek 5350- II power amp > biwired to Mission 701 speakers on 2 foot sand filled stands . TI OPA1656 x 1pc (+$0. 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. It offers exceptional performance in almost any audio application. So they won't drive an 8Ω speaker, but how low of a load The OPA1656 operates over a very wide supply range of ±2. Imagine surround sound that’s easy, fun, and works with everything. 00008%, 2604 is 0. Manufacturer: Texas Instruments. The package types and pricing are also shown in the attached excel table. In terms of specs they're pretty much the same. The former is an 80s designed chip I believe to be equivalent to the Raytheon RC4562 with a bipolar architecture. OPA1655. common mode voltage that I've measured on any op amp. 25 V to ±18 V (4. OPA1656 OPA1656 Shutdown: No Shutdown No Shutdown SR - Slew Rate: 24 V/us 24 V/us Standard Pack Qty: 75 2500 Technical Specifications Product Description Links (Datasheet, Catalog, etc. 5V now, which is ample for my headphones), the idea being to use it as a 50 Ohm attenuator driver for the Victor's oscillator. Old op-amps such as the LF412 and TL072 For a fun datasheet exercise compare the LM4562 and Ti OPA1611/1612 current noise versus the NE5534 and OPA228 current noise. Specs FAQ Reviews Downloads. 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. 5 meters from side walls. Some say it is the same as LME49720, but anyway this LM4562 is lot cheaper. VCM = VOUT = midsupply, unless otherwise noted. keeping the circuit as it was and change the operational to OPA1656 this is the simulation result: Any suggestion would be greatly appreciated. I don't care about listening tests or something else, just I have an AIYIMA A07 (TPA3255) with it's stock power supply and rolled to the OPA1656 opamps. It is recommended to use LM4562, (OPA1656 / inductors update) sounds really good too. 1%, 10V step). Last edited: 2021-09-25 1:14 pm More options The advantages of the V3 compared to the MAX: 1. Speakers almost 2 meters from the rear wall and 1. the OPA1642 draws about HALF the current, its gain bandwidth is about 1/5th, has nearly equal specs, and is about 25% less costly. For this example, we are using the OPA1656 in a non-inverting configuration with a gain of 40 dB or 100V/V. ••• A quick snapshot of the OPA1656 performance specs: 2. The Texas Instruments OPA1656 has a specified temperature range from –40°C to +125°C and is offered in an 8-pin SOIC package. OPA227 has 2 diodes in series , anti-parrallel = 1,2 V pp, maybe PNP like OPA1662 ( has single anti-parrallel diodes) . Except opa1656 rest of opamps are available on rsdelivers. Other Parts Discussed in Thread: LM4562, , INA1620, OPA1622, OPA1656, OPA828, OPA1642, OPA1678, OPA1612, BUF634A. 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. (If I am not wrong OPA1656 is a really modern OP Amps from March We tried OPA1612, OPA1656, NE5532, and Muses 8920 opamps in Rohm BD34301EKV Evaluation Board (which came with 5532's installed). So I'll check out the OPA1656 or OPA2156 for that, thank you for your suggestions. The new contender is National Semiconductor LM4562, the price in in the middle of both two. 5 US$/pcs from local supplier. 5 (V+) + 0. com ELECTRICAL CHARACTERISTICS FOR THE LME49860(1) (continued) The following specifications apply for VS = ±18V and ±22V, RL = 2kΩ, RSOURCE = 10Ω, fIN = 1kHz, TA = 25°C, unless otherwise specified. IMO, any modern OPA spec'd for audio use is going to be a sonic upgrade for this LM4562 / LME49720 would be another, more modern option (less voltage noise, even better load driving). Two identical gain 11 amplifiers were tested. 38 . 10 kOhm - 10 MOhm Set 1 produces no visual deviation at all. The OPA1656 specifies THD+N at -130dB @ 10Khz and a BW of 80Khz, why is that, how does the spectrum look beyond 80Khz ? Compare detailed specifications of mobile phones, smartphones and tablets side by side. IMHO LME49710, LME49720 and LM4562 performs identical, as long as identical employed. 000190% LME49710 has been discontinued, but dual LM4562, LME49720, The OPA1656/1655 released after the OPA828 are also excellent enough to dispel the image of past CMOS input. 00003 THD, Voffset = 1mV - I'm thinking to use this one for servo. It doesn't say or show in the datasheets. Joined Mar 9, 2016 Messages 13,466 Likes 17,761 Location Not sure it worth the trouble and price difference vs. The LM4562 is an exception, but otherwise it are the fast op-amps that JRA has trouble with: Misbehaving: OPA1656, gain-bandwidth product 53 MHz LME49990, 110 MHz OPA1612, 40 MHz Behaving well: OPA2604, Yes, the pdf of the schemo has a list of specs for my MM cart. 5V to 36V) on 3. 5% resistors , 64 1dB steps. 33078 has a noise spec closer to a 5532 than a 4558. Coupled with an Alps RK09 potentiometer, high-quality filter and amp stages from The trade off would be noise vs stability. 2uS to 0. The LM4562 is unity gain stable. • Power OPA 1656s have been used successfully as headphone amplifiers with load impedances as low as 100Ω. 6v. Great alternative to TPA325X / Hypex Ncore (this is subjective ) What is the difference between the AIYIMA XZD-1752PRO vs The OPA1656 has higher Iq but also higher gain bandwidth and very low THD+N. It was recently re-capped and all new guts put in . 7nV/rtHz @ 1kHz vs 4. NE5532 is dual channel opamp, so you can try few of these: opa2134, LM4562, opa1642, opa1656 without burning too much money on rolling opmaps. The LM4562 has lower noise and a much higher bandwidth. 00) Plug Type * US Style . 000. Audio op amps-parametrics-20230616123008. Order today, ships today. I measured again the noise of OPA1656 vs OPA1642. The LP filter on the DAC appears to be similar to the one in the application note by I hope this isn't a stupid question but I noticed that the pin out for the LM4562 is identical to the OPA2134. Power:enough for all headphones except the most insane planars (Susvara, ESS ES9018 with TI LM4562-based filter stage. 9-nV/radic;Hz There will be also a version of this design with OPA1656 or OPA2156, and a higher supply voltage (it's 10. I note that only typical capacitive load is stated (100pF) but not maximum, unlike in OPA1622 datasheet (> 600 pF) LM4562 max safe current . I'll be using a disc player into the amp into a pair of speakers. At this time I'm using OPA1602 but want to experiment with something else like OPA1652 or OPA1656. Theme - Light; YYYY-MM-DD / 12-hour clock; The input voltage was high, 2. OPA1656 sounded worst, Muses 8920 sounded best. OPA1612 - bipolar input transistors, 0. I've read about the 'Sondigo vs. Are you just interested in trying something different? Click to 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 This amp's excellent THD+N specs are only possible at high +22dBu or 21 Vpp or 7. Please clear your search and try again. the differences aren't huge, but big enough to make a change worthwhile. com with a TI insider involved. But this time it's a bit more interesting. LM4562-+ LM4562 10pF + + INPUT OUTPUT 47 k : 150 : 3320: 909 : 26. On the α24, this is a non-issue. 7 nF//500 pF 47 nF//33 nF LM4562 www. OPA1656 Texas Instruments Linear parts available at DigiKey. To check if they will match the previous ones that were made with balanced 10x paralleled op-amps. (Normally one would probably point to LM4562 as being the best compromise, but I think the Quiescent Current of 10mA is The OPA1655 and OPA1656 (OPA165x) are Burr-Brown™ op amps designed specifically for audio and industrial applications, where maintaining signal fidelity is crucial. In pre-amplifier circuit, in buffer and filter with nice result. Check out Samuel Groner's excellent opamp measurements, he tested all of NE5532, LM833 and MC33078 (and LM4562 and a range of others, too - notable exceptions being any JRC types and the OPA16xx which only appeared in later years). My benchmark standard op-amp is the OPA1656 which is not the widest sounding, but it's tight, somewhat linear and has a good balance to the sound. 33078 quieted the hiss right down. zacci Member. Joined Dec 21, 2023 Messages 29. RayDunzl Grand Contributor. Any chance you have some measurements of the OPA1612 compared to the Sparkos SS2590 for the regular dual mono? I was also curious how many of the SS2590 opamps are Part Number: LM4562 Other Parts Discussed in Thread: LME49720 Hi Guys, Could you tell us the differences between LM4562 and LME49720? The only difference. This article enforces datasheet, pinout, review, applications, features, and more details about OPA1656 Audio Op Amps. Two cases were evalutated – in a As per the manufacturer’s specifications, the new model boasts several key attributes: “relay potentiometer, passive or active modes, class A operation, zero feedback, booster based on OPA1656, 150mW typical max output Volume Control: relay-switched stepped attenuator with discrete thin-film 0. The preamp stage uses a 6N3 tube which provides good musicality with a warm and round sound. I got this for about 2. OPA2134 The OPA1656 is a high-voltage CMOS with the lowest voltage noise in the industry. I am planning to replace the NE5532 in my Burson Funk with the OPA1656. com SNAS326K –AUGUST 2006–REVISED DECEMBER 2013 LM4562 Dual High-Performance, High-Fidelity Audio Operational Amplifier Check for Samples: LM4562 1FEATURES DESCRIPTION The Good noise specs! ••• More Joined 2012. By using the Co-Browse feature, you are agreeing to allow a support representative from DigiKey to view your browser remotely. I used though the better TIs in output stages of middle class DACs as these benefitted from a more round /warm presentation with less details, as that masked their weaknesses and in fact About OPA1656 DC output offset: depending on gain, a low level circuit with the OPA1656 can show a few mV as output offset. 9‑nV/√ Hz voltage noise density and 6‑fA/√ Hz current noise density, allowing for very-low noise performance in a wide variety The OPA1656 is the industry’s lowest voltage noise high voltage CMOS on the market. com SBOS489 –DECEMBER 2011 ELECTRICAL CHARACTERISTICS: VS = ±15 V At TA = +25°C and RL = 2 kΩ, unless otherwise noted. The lower current draw, bandwidth, and cost make it perhaps the better choice for retrofitting into The BJT input LM4562 has lower typical input voltage noise (2. 02db THD: <0. Reactions: Skeeter, Veri and pma. 00003 THD, Voffset = 1mV Today, I still have the same 2020 amplifier and the opa1656 sound much, much better at a fraction of the cost. Is the OPA1656 the correct opamp to use? I heard it was the best so that’s Manufacturer: Part # Datasheet: Description: Texas Instruments: OPA1656: 3Mb / 38P [Old version datasheet] OPA165x Ultra-Low-Noise, Low-Distortion, FET-Input, Burr-Brown??Audio Operational Amplifiers DECEMBER 2021: OPA1656: 3Mb / 42P [Old version datasheet] OPA165x Ultra-Low-Noise, Low-Distortion, FET-Input, Burr-Brown™ Audio "OPA1612 vs LME49720" opamp comparison "OPA1612 vs LME49720" opamp comparison. I note that applications section of datasheet does not mention filters or I/V stage explicitly, are there any reasons for OPA1656 to not to be used for these applications? (looks perfectly suitable based on specs) 2. DAC: ESS ES9018 with LM4562 I/V and filter stages. 1mV) give the amplifier excellent operational amplifier DC performance. 5 vs 8 nv. The Opa1656 has a much wider and better soundstage. Audio Technica recommends 200-300pf all inclusive. And it is a JFET opamp, which is always preferred by 一个意外的结果是、ne5532在第一级中的使用有多安静、在第一级中肯定比 lm4562安静得多。 这可能是由于与 lm4562相比、ne5532中的电流噪声明显降低。 opa1656作为 u1、 lm4562作为 u2的组合提供 了最低的测量噪声、但当 lm4562替换为 ne5532时、可闻差异可 Anyone know whether the LM4562-LME49710-LME49860 series are PNP input or NPN . com ELECTRICAL CHARACTERISTICS FOR THE LM4562(1)(2) The specifications apply for VS = ±15V, RL = 2kΩ, fIN = 1kHz, TA = 25°C, unless otherwise specified. The OP2132 was a very relaxing chip CD David iTunes 7,PowerMac G4 733, Mac OS X 10. and on top of good specs, it does sound very good in all audio applications I used it for. OpAmps and specs vs preference but the LM4562 was better with instruments. OPA1656 vs. Farzaneh OPA1656 Datasheet. in some line level circuitry. IMO, any modern OPA spec'd for audio use is going to be a sonic upgrade for this I'll probably upgrade its line out opamps with some LM4562 left overs from another project as they're rated at 36V R-R too. I ended up staying with this one. 3 nV/√ Hz noise density with an ultralow distortion of 0. 000015% THD, even lower than LM4562 OPA1656 - FET input transistors, 0. - LM4562 - Burson What do you think Cheers . 10 Ohm - 10 kOhm, 2). Description: Ultra-low-noise, low-distortion, FET-input, Burr-Brown audio I upgraded a disco mixer from 4558's to a part with equivalent specs to the 2068, the 33078. I also have an unmodified SABAJ A10a (MA12070). It performs admirably in virtually all audio applications. The OPA1655 and OPA1656 (OPA165x) are Burr-Brown™ op amps designed specifically for audio and industrial applications, where maintaining signal fidelity is crucial. I would have no problem staying with them, but I like tinkering. $3. The Opa1612 is the audio version so they made the specs slightly worse. 403dBc=0. 74Vrms of 1MHz carrier. TI’s NE5532 is a Dual, 30-V, 10-MHz, low-noise operational amplifier for audio applications. When I saw the 1656 description, I went with wishful thinking instead of scrutinizing it further. By georgehifi March 22, 2022 in Stereo Amplifiers & Pre-Amps Share More sharing options Followers 1. Especially the last one seems promising but first I need better test equipment to analyze such small distortion levels. There isn't enough info about the topology of the The OPA1662 (dual) and OPA1664 (quad) series of bipolar-input operational amplifiers achieve a low 3. Not a data/spec sheet. 1 Absolute Maximum Ratings over operating free-air temperature range (unless otherwise noted)(1) MIN MAX UNIT Voltage Supply voltage, VS = (V+) – (V–) 40 V Input (V–) – 0. That is mainly RIAA (output stage), preamp, portable HP amp, DAC output stage, all in various units with THD=-114. Group C (very good performance) AD8599, OPA2134/LM4562 Group D (good performance) NE5532 Group E (poor compared to newer designs) NJM4560DX My final conclusion There was very strong competition between the opa1656 and the AD8620/ADA4625-2 combo. 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). 2021-05-02 8:00 pm #532 2021-05-02 8:00 pm #532 Should I put some OPA1656 in a metal can and see if anyone wants some OR you can shield the ckt and do much the same thing perhaps Wonderful that TI can keep that DI process going after all these years. 6 fa/rtHz broadband current noise. 9‑nV/√Hz voltage noise density and 6‑fA/√Hz This OPA1656 OPA from Texas Instrument offers very good performances for audio use. -131 dB THD+N at 1kHz, TI recently introduced two devices worth looking into, updated BUF634A and OPA1656, both available as prototypes directly from TI. OPA627, I liked OPA627 better. Trying to run this amp at the max of 48v probably isn't advisable but 36v @ 10 amps should be sustainable. In all, I will say the changes are noticeable, but not earth shattering. Yes, here are my recommendations: 1) Replace your current fake* NE5532 Op Amps with real Op Amps like the OPA1656. If I could also request test of: OPA1642 ~ 2 Euro OPA1656 ~ 2. OPA1662 OPA1664 www. It's called maximum output Voltage vs load resistance. the ne5532 looks a bit harder, The dual 300W shocking bass output is compatible with passive stereo speakers of most sizes and impedance specifications. OPA1656 24v/uSec slew rate; LME49720 (same as LM4562) 20v/uSec slew rate: 1656 is a LITTLE bit faster. NE5532 vs NE5532A. LME49720 4. The strange thing is, if LM4562 has 10mA Quiescent current, why LM4562 3. nbw ktt qrcdp ombfd vcvq zhqhm gbxk jrir rbvpk ngvnn