Opa1642 vs opa1656

Opa1642 vs opa1656. Jul 22, 2021 · I can't imagine the OPA1656 with an ESS unless some special whisperer secrets were applied. Dec 9, 2019 · Technically speaking, it's really hard to beat opamps like AD797, AD8599, OPA1612, OPA1656, so it might be safer to use one of these over the "exotic" ones, unless swapping opamps is really fun for you and you have enough money to spend on this hobby. 4 nV/rthz. (I believe). However it draws quite substantial current when idle. 00005% at 1 kHz. プライバシーポリシー 当サイトでは、以下のとおり個人情報保護方針を定め、個人情報保護の仕組みを構築し、個人情報保護の重要性の認識と取組みを徹底することにより、個人情報の保護を推進致します。 Products Precision op amps (Vos<1mV) INA1620 — High-fidelity audio operational amplifier with integrated thin-film resistors and EMI filtering OPA130 — Single, 1-MHz, 20-pA bias current, 530-µA power, FET operational amplifier OPA131 — Single, 4-MHz, 50-pA bias current, 750-µA power, FET operational amplifier OPA140 — Single-channel, 11-MHz, low-noise 36-V JFET precision operational Mar 17, 2019 · I replaced it with an OPA1642 and am sorry to say that there is a big difference sound-wise. Output Current characteristic curves seem to behave in opposite manners. If a FET-input amplifier is required for low bias current (such as for a phono preamp), you might consider the OPA1642 or OPA1678. 8 mA per channel. 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. But this time it's a bit more interesting. 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 ran The OPA1611 (single) and OPA1612 (dual) bipolar-input operational amplifiers achieve very low 1. 1-nV/√Hz noise, low THD+N (0. But more importantly, it's CMOS. If you have an account with TI, the OPA 1612 can still be ordered as samples. 5-nV/√ Hz noise density with an ultra-low distortion of 0. Two schematics in parallel and eight in parallel for both 1656 and 1642 were measured. Every amp. 00003% at 1kHz. I had no oscillations or instability with the OPA1656. Mar 17, 2019 · Rolling opa1642, opa1612, muses8920, 2xopa627bp, lme49720na, opa2134. . Dec 28, 2017 · There are some things to watch out for when swapping op amps. 9 mA of supply current to accommodate the power supply constraints of many types of audio products. Depending on the actual application circuit, there are alternatives with better noise performance. Sometimes the company decides to go from two letters to three in the part number and parts get stuck in the middle. See the LM4562 vs LME49720 for Jun 19, 2021 · The OPA1642 has more open at the high frequency, it is more detail but it noticeable sharp and edgy sound. I’m going to solder the IC to a soic to dip adapter then plug it into the the amp. Two identical gain 11 amplifiers were tested. ah so much other untested opa's 1678 still on my list ina1620. I would tend to use the OPA1642 for buffering, filtering and EQ. 9‑nV/√ Hz voltage noise density and 6‑fA/√ Hz current noise density, allowing for very-low noise performance in a wide variety Mar 17, 2019 · The OPA1641 would be slightly better. Dec 10, 2021 · This is my first time doing anything DIY with audio. The OPA1641, OPA1642, and OPA1644 rail-to-rail output swing allows increased headroom, making these devices ideal for use in any audio circuit. OPA1642 sucks 1. 1F X7R on the backside with the shortest possible lead length. Opa1612 is generally slightly light weighted but very balanced otherwise. NE5532 is a very good amplifier especially for the price ($0. 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 Jun 8, 2023 · I read that many like OPA1656/1655 very much. 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. Stage 1 changes the opamp to a OPA1641. ••• The OPA1656 is the industry’s lowest voltage noise high voltage CMOS on the market. Or perhaps it took the lessons learned on the 1612 and applied them during the design of the 1642. Jun 14, 2023 · OPA1656. To date, bipolar opamps have ruled when Mar 22, 2022 · I’ve known about the OPA 1612 when they were 1st released. OPA1656 sounded worst, Muses 8920 sounded best. The schematic, spectrum and results are given below. The package types and pricing are also shown in the attached excel table. OPA1642. Regarding the tone stack, if there is enough gain in the front-end, the input-referred noise may not be impacted by the resistances. Hmmmm. I did check OPA1656 in voltage regulators and didn’t like elevated LF noise (compared to JFET opamps). The OPA1656 has higher Iq but also higher gain bandwidth and very low THD+N. Mar 17, 2019 · Noise OPA827 vs OPA1656. But I really like the FET's in that position. Got these when they first released them b4 the acquisition of LME from National. Mar 17, 2019 · I seem to recall that the OPA1642 is newer than the OPA1612. 2-nV/√ Hz noise density and distortion of –127 dB at 1 kHz. Tested a lot of OP, including LME49720, OPA1612, OPA1642, MUSES8920 and MUSES8820. It needs an adapter though. 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, We would like to show you a description here but the site won’t allow us. ti. As long as your not using them for military purposes. Other Parts Discussed in Thread: OPA1612, OPA1642, RC4136 I use these amplifiers for pro audio. I had a vision in mind with the Modi 3+ and the OPA1656 happened to work and achieve this vision. My favorites at the moment opa1642 and this one opa1656. . I have tried muse02, muse 8920 didnt feel they were worth the hype or price. com and all are unity gain stable. Jul 4, 2009 · You are not “wrong“ in describing the Opa1656, it is recommended to be used in portable devices I/V stage because it has a input fet like the opa1612 and the opa1642. ounding-op-amps-lowest-thd-8. 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. e. I also refurbish large format recording consoles. Jul 4, 2009 · 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 them in bulk (we’re talking 100s to 1000s) and The OPA1652 (dual) and OPA1654 (quad) FET-input operational amplifiers achieve a low 4. r/audiophile is a subreddit for the pursuit of quality audio reproduction of all forms, budgets, and sizes of speakers. The op amp offers a temperature range of -40°C to +125°C and is available in an 8-pin SOIC package. 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 The OPA1655 and OPA1656 (OPA165x) are Burr-Brown™ op amps designed specifically for audio and industrial applications, where maintaining signal fidelity is crucial. 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. A forum member who used to work in development at National (and then got laid off after TI took over) tipped me off many years ago to try the metal can. Hi team, The following two sets of Output Voltage vs. 1-nV/√ Hz noise density with an ultralow distortion of 0. Stage 2 remains as an OPA1611, so the FB factor just increases by 6dB. 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. Since I am not interested in the V6 Vivid Dual that it comes with. It has to do with the load capacity limitation be under a certain load capacity of 50 ohms. 000015% at 1 kHz. IMHO the outcome was mostly decided by how the opamps responded to the RF coming out of the dac chip. I am planning to replace the NE5532 in my Burson Funk with the OPA1656. com with a TI insider involved. 00005%), a low input bias current of 2 pA, and low quiescent current of 1. Mar 17, 2019 · OPA1656 rolling I tried in all cases to bypass the rails with a 0. OPA1641-Q1, OPA1642-Q1 SBOS791A–JUNE 2017–REVISED NOVEMBER 2017 www. There's no shortage of candidates here, and the new OPA1656 is a great option, but you could also check out: OPA1642, OPA1678, OPA827, and the newer OPA828, or also OPA2810. Currently, I require opamps in the DIP package. Easiest is to replace LF351N and LF353N for the OPA134 and OPA2134 just like the shop in Idaho did. We would like to show you a description here but the site won’t allow us. For example, Aol for the OPA1656 with a 600 ohm load will have a linear output swing that is 1. 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. OPA1622 SoundPlus High-Fidelity, Bipolar-Input, Audio Lead finish/ The OPA2156 is a new, high-performance op-amp from TI. The OPA1641 (single), OPA1642 (dual), and OPA1644 (quad) series are JFET-input, ultralow distortion, low-noise operational amplifiers fully specified for audio applications. Find parameters, ordering and quality information 1 10 100 1000 1 10 100 1k 10k 100k 1M 10M 9ROWDJH1RLVH6SHFWUDO'HQVLW\ Q9 ¥+] Frequency (Hz) C006 Product Folder Sample & Buy Technical Documents Tools & Software Dec 11, 2019 · Normally you'd regularily search in the manufacturers new product listings first for any new interesting products. png. OPA1642 is its replacement despite the lower type number. It has the most stable input capacitance vs. Aol 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, 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. 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. I don't care about listening tests or something else, just want to use the technical better one in my amp. Opa2156 sounds a little more "detailed" and a little "grainy" in comparison. The OPA1642, however, is also LESS expensive ($2. Dec 6, 2018 · Just replace the original op-amp with one with a similar specification, if it's not possible to find an exact replacement. The OPA1656 immediately raised my attention, plus there was/is a long thread about it on diyaudio. Perhaps it's a further development. Are there any other Part Number: OPA1642 Other Parts Discussed in Thread: OPA1652. html#post6555025 that is saying that the OPA1656 is quite a bit noisier than the OPA1642 AT LOW The OPA1602 and OPA1604 bipolar-input operational amplifiers achieve very low 2. (or the 2156) The opamp has good phase margin and seems quite tolerant of sub-optimal layout. It offers exceptional performance in almost any audio application. For the case of The OPA169x operational amplifiers achieve a new level of performance for low-power amplifiers with a low 4. Except opa1656 rest of opamps are available on rsdelivers. And of course measurements will confirm that the part worked. PRODUCTION DATA. I put together a table below showing devices that have high input impedance and some key parameters for comparison. Old op-amps such as the LF412 and TL072 are more than good enough for 99% of audio applications. For OPA1642, the output current (limit) appears to increase with increasing temperature. Thanks in Products Precision op amps (Vos<1mV) INA1620 — High-fidelity audio operational amplifier with integrated thin-film resistors and EMI filtering OPA130 — Single, 1-MHz, 20-pA bias current, 530-µA power, FET operational amplifier OPA131 — Single, 4-MHz, 50-pA bias current, 750-µA power, FET operational amplifier OPA140 — Single-channel, 11-MHz, low-noise 36-V JFET precision operational Mar 17, 2019 · 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. consists of 2 x 10 op-amps in parallel and the two 10s are balance connected. tiの最新オペアンプopa1656のサンプルを入手したので、動かしてみました。 このオペアンプは名前からわかるように旧BB系のオペアンプです。 OPA1642の後継のような位置づけのものですね。 • audio·phile: a person with love for, affinity towards or obsession with high-quality playback of sound and music. Audio op amps-parametrics-20230616123008. Which of the two mentioned OP Amps (OPA1612 or OPA1656) is the better one, in a scientific point of view. Mar 21, 2023 · The trade off would be noise vs stability. 5 V to 36 V) on 3. 5nV/√ Hz noise density with an ultralow distortion of 0. The FET-input architecture achieves a low 2. Is the OPA1656 the correct opamp to use? I heard it was the best so that’s why I picked it. It's a killer OpAmp, and better suited to non-inverting buffer duties than the OPA1612/2211 The OPA1641 (single), OPA1642 (dual), and OPA1644 (quad) series are JFET-input, ultralow distortion, low-noise operational amplifiers fully specified for audio applications. To check if they will match the previous ones that were made with balanced 10x paralleled op-amps. May 23, 2018 · Opa1642 sounds a bit smoother and silky at top end but a little bit fat in the mids. Mar 17, 2019 · The OPA1641 would be slightly better. JFET inputs let you work with a larger range of input resistors. I pick opamps specifically based on their sound from an subjective point of view, ther datasheets. The specs on the opamp are really good, almost as good as the OPA1612 (and better in some ways that will be covered below). When we developed the OPA1656, this was also a major design target for us, and the designer and myself spent quite awhile in the lab with previous CMOS audio op amps (specifically OPA1652 and OPA1688) hunting for sources of input capacitance variation. 3nV/rtHz) and distortion (-124dB), wide bandwidth (22MHz) audio op amp. diyAudio Community diyAudio Mar 14, 2010 · Tubey, better late than never - I just replaced all NE5532 amps in Benchmark DAC1 with OPA1612 and play it so far for few hours. May 9, 2023 · Hello together, i want to put one of the mentioned OP Amps in my amp. common mode voltage that I've measured on any op amp. The output swing for Aol should be considered as it is different between the two devices. Nov 20, 2020 · So, I generally would recommend replacing the LME49720s with OPA1642 or OPA1656- with a slight preference for the cheaper, lower current OPA1642. Feb 11, 2021 · Below is a comparison between OPA1656 and OPA1642. Best Regards, Chris Featherstone May 13, 2015 · NE5532 is dual channel opamp, so you can try few of these: opa2134, LM4562, opa1642, opa1656 without burning too much money on rolling opmaps. Below, I have highlighted the components that could be adjusted if this the issue. At least, OPA828 has proper JFETs at input. not going into high frequency oscillation) are different and just swapping ICs may cause problems -- you might need to add some compensation for the OPA1678, depending on Mar 17, 2019 · Here there are a number of options: BJT-inputs without bias current cancellation (OPA1622), Super-Beta BJTs (OPA2210), Low voltage noise JFET and CMOS (OPA1642, OPA827, OPA828, OPA1656/2156). 08 @ Mouser). Sep 14, 2021 · 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. xlsx The OPA1641 (single), OPA1642 (dual), and OPA1644 (quad) series are JFET-input, ultralow distortion, low-noise operational amplifiers fully specified for audio applications. Normally, that's not newsworthy because higher performing parts are coming out all the time. This is how I got a set of these including OPA1642 and OPA827. Any futher recommendations? my favs 1642/1656, 1612, lme49720na 2xopa627bp, ••• OPA2134 is probably a good choice in general. LME49720 vs OPA1612 vs Muses02. For the MM design the overall gain is dropped by 20dB, 14dB in stage 1, 6dB in stage 2. 3V inside of each supply. Mar 17, 2019 · I measured again the noise of OPA1656 vs OPA1642. The OPA1655 and OPA1656 (OPA165x) are Burr-Brown™ op amps designed specifically for audio and industrial applications, where maintaining signal fidelity is crucial. Feb 11, 2021 · I agree about the OPA1612 for gain. Mar 17, 2019 · 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 less THD, but worse CMRR. OPA1656と同様に10kHzの歪みが少ないことが特徴です。 OPA1656と比較して消費電流が少ないですが最大出力電流も少ないです。 初段のノイズが増えていること，消費電力が減っていることから初段の電流を絞ったと思われます。 OPA2134 is good but it consumes more power than normal (8 to 10 mA per IC) and it is not rail to rail output. When I do serious listening test between them, just an A - B testing, not back and forth, I found the OPA1642 creates more noise at upper frequency because of those high frequency details. I used 10 or 12 in my preamp rolling project - never a problem with TI’s OPA1662 is a Dual SoundPlus™ low noise (3. 9‑nV/√ Hz voltage noise density and 6‑fA/√ Hz current noise density, allowing for very-low noise performance in a wide variety The OPA1641 (single), OPA1642 (dual), and OPA1644 (quad) series are JFET-input, ultralow distortion, low-noise operational amplifiers fully specified for audio applications. com (DIFF) Differential input voltage ±VS V IO Output short-circuit(3) Continuous May 15, 2022 · Buggle2 Riaa board. Nov 30, 2021 · Stability should be considered especially with the wider bandwidth of the OPA1656. This is just a theory. Sep 27, 2019 · The OPA1656 operates over an ultra-wide supply range of ±2. 5). 25 V to ±18 V (4. Mar 17, 2019 · We tried OPA1612, OPA1656, NE5532, and Muses 8920 opamps in Rohm BD34301EKV Evaluation Board (which came with 5532's installed). Features include 5. The old 49720HA sounds more direct and dynamic than the newer SMD opamp. I haven’t tried it for audio as outright replacing JFETs with CMOS looked like blasphemy to me. ueusd fweasuja asnho evzjt gjrug uwzwgf eiwhyut pesusk sezuxejw mnumwu  »