Opa1642 vs opa1656

Opa1642 vs opa1656. But this time it's a bit more interesting. 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. And of course measurements will confirm that the part worked. 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. . Mar 17, 2019 · OPA1656 rolling I tried in all cases to bypass the rails with a 0. Mar 17, 2019 · Noise OPA827 vs OPA1656. Hi team, The following two sets of Output Voltage vs. 000015% at 1 kHz. Got these when they first released them b4 the acquisition of LME from National. I did check OPA1656 in voltage regulators and didn’t like elevated LF noise (compared to JFET opamps). com and all are unity gain stable. . We would like to show you a description here but the site won’t allow us. However it draws quite substantial current when idle. 1F X7R on the backside with the shortest possible lead length. 8 mA per channel. Depending on the actual application circuit, there are alternatives with better noise performance. Which of the two mentioned OP Amps (OPA1612 or OPA1656) is the better one, in a scientific point of view. If a FET-input amplifier is required for low bias current (such as for a phono preamp), you might consider the OPA1642 or OPA1678. It has to do with the load capacity limitation be under a certain load capacity of 50 ohms. r/audiophile is a subreddit for the pursuit of quality audio reproduction of all forms, budgets, and sizes of speakers. I put together a table below showing devices that have high input impedance and some key parameters for comparison. I also refurbish large format recording consoles. Mar 17, 2019 · I measured again the noise of OPA1656 vs OPA1642. 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. Output Current characteristic curves seem to behave in opposite manners. 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. Are there any other Part Number: OPA1642 Other Parts Discussed in Thread: OPA1652. IMHO the outcome was mostly decided by how the opamps responded to the RF coming out of the dac chip. Easiest is to replace LF351N and LF353N for the OPA134 and OPA2134 just like the shop in Idaho did. (or the 2156) The opamp has good phase margin and seems quite tolerant of sub-optimal layout. OPA1642. Every amp. Mar 17, 2019 · I seem to recall that the OPA1642 is newer than the OPA1612. It has the most stable input capacitance vs. com with a TI insider involved. Normally, that's not newsworthy because higher performing parts are coming out all the time. 5nV/√ Hz noise density with an ultralow distortion of 0. Opa1612 is generally slightly light weighted but very balanced otherwise. Sometimes the company decides to go from two letters to three in the part number and parts get stuck in the middle. Old op-amps such as the LF412 and TL072 are more than good enough for 99% of audio applications. 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. I’m going to solder the IC to a soic to dip adapter then plug it into the the amp. 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. ounding-op-amps-lowest-thd-8. Sep 27, 2019 · The OPA1656 operates over an ultra-wide supply range of ±2. Since I am not interested in the V6 Vivid Dual that it comes with. Audio op amps-parametrics-20230616123008. OPA1642 sucks 1. Mar 17, 2019 · We tried OPA1612, OPA1656, NE5532, and Muses 8920 opamps in Rohm BD34301EKV Evaluation Board (which came with 5532's installed). 25 V to ±18 V (4. common mode voltage that I've measured on any op amp. 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. 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. 1-nV/√Hz noise, low THD+N (0. 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. 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. The old 49720HA sounds more direct and dynamic than the newer SMD opamp. in order to resurrect those signals the preamp applies a maximum gain of 1000 b/c the basic mid-band gain must be ~ x100. com (DIFF) Differential input voltage ±VS V IO Output short-circuit(3) Continuous May 15, 2022 · Buggle2 Riaa board. Below, I have highlighted the components that could be adjusted if this the issue. The OPA1642, however, is also LESS expensive ($2. 9 mA of supply current to accommodate the power supply constraints of many types of audio products. For OPA1642, the output current (limit) appears to increase with increasing temperature. Hmmmm. 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. This is just a theory. 3nV/rtHz) and distortion (-124dB), wide bandwidth (22MHz) audio op amp. I haven’t tried it for audio as outright replacing JFETs with CMOS looked like blasphemy to me. I used 10 or 12 in my preamp rolling project - never a problem with TI’s OPA1662 is a Dual SoundPlus™ low noise (3. 00005%), a low input bias current of 2 pA, and low quiescent current of 1. LME49720 vs OPA1612 vs Muses02. 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. The OPA1656 immediately raised my attention, plus there was/is a long thread about it on diyaudio. Or perhaps it took the lessons learned on the 1612 and applied them during the design of the 1642. 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. OPA1656 The OPA1655 and OPA1656 (OPA165x) are Burr-Brown™ op amps designed specifically for audio and industrial applications, where maintaining signal fidelity is crucial. The OPA1656 has higher Iq but also higher gain bandwidth and very low THD+N. To check if they will match the previous ones that were made with balanced 10x paralleled op-amps. 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. At least, OPA828 has proper JFETs at input. Jun 14, 2023 · OPA1656. Regarding the tone stack, if there is enough gain in the front-end, the input-referred noise may not be impacted by the resistances. 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. png. (I believe). I don't care about listening tests or something else, just want to use the technical better one in my amp. The OPA1641, OPA1642, and OPA1644 rail-to-rail output swing allows increased headroom, making these devices ideal for use in any audio circuit. The FET-input architecture achieves a low 2. The op amp offers a temperature range of -40°C to +125°C and is available in an 8-pin SOIC package. ti. The output swing for Aol should be considered as it is different between the two devices. It offers exceptional performance in almost any audio application. The OPA1641 (single), OPA1642 (dual), and OPA1644 (quad) series are JFET-input, ultralow distortion, low-noise operational amplifiers fully specified for audio applications. Except opa1656 rest of opamps are available on rsdelivers. 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. 5-nV/√ Hz noise density with an ultra-low distortion of 0. Currently, I require opamps in the DIP package. 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). OPA1641-Q1, OPA1642-Q1 SBOS791A–JUNE 2017–REVISED NOVEMBER 2017 www. Tested a lot of OP, including LME49720, OPA1612, OPA1642, MUSES8920 and MUSES8820. 00003% at 1kHz. I would tend to use the OPA1642 for buffering, filtering and EQ. If you have an account with TI, the OPA 1612 can still be ordered as samples. 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. Opa2156 sounds a little more "detailed" and a little "grainy" in comparison. Two schematics in parallel and eight in parallel for both 1656 and 1642 were measured. For the case of The OPA169x operational amplifiers achieve a new level of performance for low-power amplifiers with a low 4. I have tried muse02, muse 8920 didnt feel they were worth the hype or price. Mar 17, 2019 · Rolling opa1642, opa1612, muses8920, 2xopa627bp, lme49720na, opa2134. OPA1622 SoundPlus High-Fidelity, Bipolar-Input, Audio Lead finish/ The OPA2156 is a new, high-performance op-amp from TI. 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 The OPA1641 (single), OPA1642 (dual), and OPA1644 (quad) series are JFET-input, ultralow distortion, low-noise operational amplifiers fully specified for audio applications. NE5532 is a very good amplifier especially for the price ($0. 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. Is the OPA1656 the correct opamp to use? I heard it was the best so that’s why I picked it. 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. 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. 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. Mar 21, 2023 · The trade off would be noise vs stability. OPA1656 sounded worst, Muses 8920 sounded best. 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. OPA1642 is its replacement despite the lower type number. consists of 2 x 10 op-amps in parallel and the two 10s are balance connected. I pick opamps specifically based on their sound from an subjective point of view, ther datasheets. But more importantly, it's CMOS. 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. xlsx The OPA1641 (single), OPA1642 (dual), and OPA1644 (quad) series are JFET-input, ultralow distortion, low-noise operational amplifiers fully specified for audio applications. 00005% at 1 kHz. Jul 22, 2021 · I can't imagine the OPA1656 with an ESS unless some special whisperer secrets were applied. 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. 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. This is how I got a set of these including OPA1642 and OPA827. e. 08 @ Mouser). The package types and pricing are also shown in the attached excel table. PRODUCTION DATA. I had no oscillations or instability with the OPA1656. Feb 11, 2021 · Below is a comparison between OPA1656 and OPA1642. Other Parts Discussed in Thread: OPA1612, OPA1642, RC4136 I use these amplifiers for pro audio. 2-nV/√ Hz noise density and distortion of –127 dB at 1 kHz. Any futher recommendations? my favs 1642/1656, 1612, lme49720na 2xopa627bp, ••• OPA2134 is probably a good choice in general. Mar 17, 2019 · The OPA1641 would be slightly better. 3V inside of each supply. 4 nV/rthz. Perhaps it's a further development. The OPA1655 and OPA1656 (OPA165x) are Burr-Brown™ op amps designed specifically for audio and industrial applications, where maintaining signal fidelity is crucial. 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. I am planning to replace the NE5532 in my Burson Funk with the OPA1656. Features include 5. 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. Dec 10, 2021 · This is my first time doing anything DIY with audio. ah so much other untested opa's 1678 still on my list ina1620. It needs an adapter though. 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. I had a vision in mind with the Modi 3+ and the OPA1656 happened to work and achieve this vision. Stage 1 changes the opamp to a OPA1641. May 23, 2018 · Opa1642 sounds a bit smoother and silky at top end but a little bit fat in the mids. 5). 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. 5 V to 36 V) on 3. Dec 28, 2017 · There are some things to watch out for when swapping op amps. As long as your not using them for military purposes. 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. For the MM design the overall gain is dropped by 20dB, 14dB in stage 1, 6dB in stage 2. 1-nV/√ Hz noise density with an ultralow distortion of 0. 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. JFET inputs let you work with a larger range of input resistors. For example, Aol for the OPA1656 with a 600 ohm load will have a linear output swing that is 1. Stage 2 remains as an OPA1611, so the FB factor just increases by 6dB. 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. Two identical gain 11 amplifiers were tested. Nov 30, 2021 · Stability should be considered especially with the wider bandwidth of the OPA1656. My favorites at the moment opa1642 and this one opa1656. 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. ••• The OPA1656 is the industry’s lowest voltage noise high voltage CMOS on the market. But I really like the FET's in that position. May 9, 2023 · Hello together, i want to put one of the mentioned OP Amps in my amp. The specs on the opamp are really good, almost as good as the OPA1612 (and better in some ways that will be covered below). To date, bipolar opamps have ruled when Mar 22, 2022 · I’ve known about the OPA 1612 when they were 1st released. fvrte swgncr cbhqpl gpbsg ska rxtulzv ezltlt hxge pirsc efccrb