Opa1642 sound quality forum A lot times, delays, modulation pedals, compressors, boosts, buffers, mixers, adc, 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. com/product/OPA2134 OR http://www. Joined 2009. Suggestion: as opa1656 has pretty low voltage noise, and very low current input noise as well The OPA1642 has more open at the high frequency, it is more detail but it noticeable sharp and edgy sound. Douglas Self advices not to bypass them to ground. More Help Support Us Forum Rules. All products; Portable Devices; Desktop Devices; Headphones; Speakers; Retro Products; decreases interference and noise floor so as to ensure the purity of the sound quality. 0*2 Gode tilbud fra hylderne High-Perforamnce,JFET-Input AUDIO OPERATIONAL AMPLIFIERS, OPA1642 Datasheet, OPA1642 circuit, OPA1642 data sheet : TI, alldatasheet, Datasheet, Datasheet search site for Electronic Components and Semiconductors, integrated circuits, diodes, triacs and other semiconductors. 00003% at 1kHz. r/audiophile is a subreddit for the pursuit of quality audio reproduction of all forms, budgets, and sizes of speakers. I'm using the OPA1642 as a transimpedance. Self proponents and the JLH proponents it certainly was interesting times then and very heated views were exchanged . Amplifiers; API solutions; Audio; Audio Audio forum. 00005% at 1 kHz • High Slew Rate: 20 Audio Amplifiers Dual automotive soundplus™ high-performance, JFET-input audio op amps 8-VSSOP -40 to 125 +1 image OPA1642AQDGKRQ1 OPA1642 OPA1644 www. You can dig on the Internet and find modern op-amp test results, but it quickly crosses over into sonic character and subjective opinion. Last edited: Dec 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. Only unmoderated members can post here. Next, OPA828 was evaluated as a gain or VAS section in a small A class power amplifier with extreme performance (2 MHz power bandwidth, 200 ns rise time, 0. John Caldwell says they're in the process of The OPA 1612 has a higher PSRR . Hi team, There is an analog mic in and with 2 meters cable to the OPA1642. Joined Jan 1, 2019 Messages 5,474 Likes 12,074 Location São Paulo, Brazil. Search titles only By: Search Advanced Hi Are there some alternatives for the opa1642 that 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. See the teardown video here : WiiM ultra review and a peek under the lid forum. Reinforced battery capacity. com SBOS484B – DECEMBER 2009– REVISED AUGUST 2010 ™ High-Performance,JFET-Input AUDIO OPERATIONAL AMPLIFIERS Check for Samples: OPA1641, OPA1642, OPA1644 1FEATURES DESCRIPTION 234• SUPERIOR SOUND QUALITY The OPA1641 (single), OPA1642 (dual), and • TRUE JFET INPUT OP AMP OPA1644 (quad) AD 823 VS OPA2132 LM 4562 is superior to the OPA2132 are you sure? LME49720 I threw them in the trash together with the LM4562 in crossover use. Electronic Components Datasheet Search English Chinese: German: Japanese: Russian High-Perforamnce,JFET-Input AUDIO OPERATIONAL AMPLIFIERS OPA1642: 679Kb / 31P [Old version datasheet] http://www. 1-nV/√ Hz noise, low THD+N 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. soekris. It doesn't have that airiness that AD op amps have. DAC Driver. The diyaudio forum might be better suited for posing the question. OPA1642 sucks 1. 00005% at 1 kHz • High Slew Rate: 20 Sound quality was my first priority, as for form factor, no problem doing 8 pin soic to dip. The OPA1642 is the best choice that you can make other than incredibly expensive ones that provide very, very, slightly less noise and higher distortion. I would like ( and have suggested to Eversolo) that any ‘A-8’ should add useful functionality , EQ for example. I have now listened to them for about half a day I agree they are great! Slightly less transparent when compared to the OPA2828, but they offer a bit It was not only my opinion. 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. Or you try to add nothing (or not measurable). Hi team, The following two sets of Output Voltage vs. Log in Register. After confirming the fault condition Three pins of Pin 8 + Supply, Pin 5 + INPUT, and Pin 4 - Supply were short-circuited inside The LM833 just after the MASH DAC, might cause stability issues. File Size: 742Kbytes. Click here to have your audio equipment measured for free! Forums. 00005% at 1 kHz • High Slew Rate: 20 The OPA1602 and OPA1604 bipolar-input operational amplifiers achieve very low 2. Desire to learn and share knowledge of science required. Our primary goal is insightful discussion of home audio equipment, sources, music, and concepts. Help me pick an operational amplifier for a stereo amplifier- OPA1642 or OPA1656 or LM4562? K. 00005% at 1 kHz • High Slew Rate: 20 . 1 MB · Views: 160 test_OPA1642 vs OPA2134. 1 nV/√Hz at 1 kHz • Ultralow Distortion: 0. Kartapus. Reply reply More replies More replies More replies. 00005% at 1 kHz • High Slew Rate: 20 The OPA1642AID is a dual sound-plus high-performance JFET-input Operational Amplifier for use with High-End A/V receivers. The OPA1641, OPA1642, and OPA1644 rail-to-rail output swing allows increased headroom, making these devices ideal for use in any audio circuit. A. OPA1641 (single), Automotive-Grade, Audio Operational Amplifiers OPA1642-Q1: 679Kb / 31P [Old version datasheet] SoundPlus JFET-Input, Automotive-Grade, Audio Operational Amplifiers OPA1642AID: 742Kb / 22P [Old version datasheet] High-Performance, JFET-Input AUDIO OPERATIONAL AMPLIFIERS More results. Best SQ have with 1656. The OPA164x/OPA164x-Q1 op amps operate 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. I had a look again at the BA4560, the F is just the package it's in. Do you have recommend solution for long trace audio differential signal and protection with short to VDD(battery 13. I am curious on the bias with OPA1642, the voltage tested on TP770 2V44, TP771 2V31, U720 pin1 2V3, pin7 2V9, U721 pin1 2V3, pin7 2V3, it very strange compared with applied OPA1652 which all the test point I have terribly damaged my Sound Blaster X-FI with so many op amp changes. com/product/OPA1642, the OPA1642 can be used fully diferential(balanced) to a studio monitor or amp, The sound of this OPAMP is indeed bliss, and extremely neutral with a very wide soundstage. 6 KB · Views: 154 Last edited: Dec 19, 2023. PC - RME ADI-2 DAC FS - Neumann KH 120 II 4. OPAmps do make a lot of difference in sound quality. In particular, IIRC, DECT wireless phone base stations in the near vicinity (say, maybe, 10ft. 0000x distortion and so on). Ask a new question Ask a new question Cancel; State; Replies 0 replies Subscribers 29 subscribers Views 3 views 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. 00005% at 1 kHz • High Slew Rate: 20 I agree it is always worth striving for and supporting excellence in engineering, and you clearly understand that a slightly better sinad will not improve sound quality. 00005% at 1 kHz • High Slew Rate: 20 Site Site Announcements Forum Problems & Feedback Terms and Rules. 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. jpg. All solder pads are destroyed but that doesn't stop me from trying different op Menu. Dual op-amps OPA1612. Description: SoundPlus JFET-Input, Automotive-Grade, Audio Operational Amplifiers. Device : OPA1688 and OPA1642. wiimhome. The OPA1641, OPA1642, and OPA1644 rail-to-rail output swing allows Superior Sound Quality; True JFET Input Operational Amplifier The OPA1641 (single), OPA1642 (dual), and OPA1644 (quad) series are JFET-input, ultralow distortion, low-noise operational amplifiers fully specified for audio applications. Improved sound The OPA1642AID is a dual sound-plus high-performance JFET-input Operational Amplifier for use with High-End A/V receivers. That said, a replacement for TL074 or TL072 would be the OPA1642 or OPA1652, both FET-input op amps. Bass Off: Bypasses bass circuit, decreases interference and noise floor so as to ensure the purity of the sound quality. 00005% at 1 kHz Part Number: OPA1642 Other Parts Discussed in Thread: OPA2140 , OPA827 , , OPA140 OPA827, OPA2140 & OPA1642 source impedance and distortion issue. Member. Home. or so) of an unshielded LME49720 have been Related to same question, If i changed the op amp to Muses02, will it also effect the sound signature of signal being sent to the power amp via the RCA line out as well? 2. Power Supply: Low noise, high quality switching power supplies. Audio, Audio, Audio! DACs, Streamers, Servers, Players, Audio Interface. Support. Pre amplifier OPA1642: serves as the voltage amplifier, with great layering and medium and high frequency extension. 00005% at 1 kHz • High Slew Rate: 20 OPA1642 Series Audio Amplifiers are available at Mouser Electronics. Supply via 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. If one has to use a FET input amplifier for audio in a non-inverting stage, this would be my first choice today. 00005% at 1 kHz • High Slew Rate: 20 Sound quality and power are affected by configuration. For the EQ I would suggest OPA2132 or (slightly worse) OPA2134. With effects sometimes the lesser quality is more better . 00005% at 1 kHz • High Slew Rate: 20 The Analog Devices OP275 is one of the few opamps specifically marketed as an audio device. Marketplace Home. 5. An audio analyzer might be able to analyze jitter which should be greatly reduced when compared to a lesser clock. The improvements in detail, space, separation, and air aren't measured by an audio analyzer and would come in droves with these clocks. tcpoint Well-known member. For OPA1642, the output current (limit) appears to increase with increasing temperature. For high source impedance sensors such as a phono cartridge lower current noise is better. 00005% at 1 kHz • High Slew Rate: 20 US Dollars Incoterms:FCA (Shipping Point) Duty, customs fees and taxes are collected at time of delivery. The NJM4560DX does not appear Nothing changes in life the same arguments in the 80,s/90. The OPA1641, OPA1642, and OPA1644 rail-to-rail output swing allows increased headroom, making these devices ideal for OPA1642 OPA1642 SR - Slew Rate: 20 V/us 20 V/us Standard Pack Qty: 2500 250 Subcategory: Audio ICs Audio ICs Supply Current - Max: 1. 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 for the complete circuit. JktHifi Senior Member. TI E2E support forums. Manufacturer Part Number: OPA1642 I'm interested in knowing if these parts have gone through life testing at 125C? My team is looking upscreen these parts and are seeking guidance I have used the opa1642 as a replacement. (up to 300mW under a 32Ω load) and greater ability to deal with capacitive loads. 00005% at 1 kHz • High Slew Rate: 20 The a. Dear Sir/Madam, While reviewing the datasheet OPA1642 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. m. Modern op amps are so good at working in "bad" environment that they retain quality very well. Can work while charging; 1400mAH built-in battery ensures more than 16hrs of battery life. The first stage is a non inverting amplifier with switchable gain up to 50, the second stage uses both of the OPA1642 amplifiers as an inverting amplifier with a gain of 1 to buffer it to an ADC with symmetric inputs. com/product/OPA1642, the OPA1642 can be used fully diferential(balanced) to a studio monitor or amp, Audio Audio forum. Our primary goal is insightful For this reason, I'd recommend consulting forums (diyAudio, for example) for reports of other similar swaps, and the sound quality they've achieved. Phone - Tanchjim Space - Truthear Zero Forum Home Amplifiers Solid State Pass Labs Tubes / Valves Chip Amps Class D Power Supplies Headphone Systems. For audio the OPA1642 is probably a better candidate. High-Perforamnce,JFET-Input AUDIO OPERATIONAL AMPLIFIERS OPA1642: 679Kb / 31P [Old version datasheet] SoundPlus JFET-Input, Automotive-Grade, Audio Operational Amplifiers OPA1642-Q1: TI is committed 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. 00005% at 1 kHz 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. Digital To Analog (DAC) Reviews and Discussion . Vendors Audio Poutine Holton Precision Audio Elekit XRK Audio More Vendors More. However, most CMOS input amplifiers may need those diodes - exception is in the case of 'MUX friendly' op amps like OPA2197. What The Vendor's Bazaar forum is for commercial offers and transactions. Amplifiers; API solutions; Audio Audio forum. 00005% at 1 kHz • High Slew Rate: 20 • audio·phile: a person with love for, affinity towards or obsession with high-quality playback of sound and music. Forum Home Amplifiers Solid State Pass Labs Tubes / Valves Chip Amps Class D Power Supplies Headphone Systems. Fully discrete bass circuit design. Featured Vendors The diyAudio Store; Parts Connexion the non-audio / general purpose instrumentation version of OPA1642? Mouser has a bunch of stock for the SOIC-8 package. com/product/OPA1642, the OPA1642 can be used fully diferential(balanced) to a studio monitor or amp, OPA1642 Series Audio Amplifiers are available at Mouser Electronics. however I cannot source an OPA164x at the moment, seems to be some kind of shortage. Every audio amplifier will almost always need to connect to data converter (DACs, ADCs, CODECs), which TI also makes. Hello, I'm rebuilding/upgrading a pair of blown up KRK 5 G3 monitors that I got tossed for free. Thank you and Regards, Luis It seems to be verified now in a teardown on the WiiM forum that ultra uses 4 opa1611 Op amps in the analog stage after the dac, same Op:s as in Linns recent streamers like selekt and klimax. 00005% at 1 kHz • High Slew Rate: 20 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. The Superior Sound Quality; True JFET Input Operational Amplifier With Low Input Bias Current; Low Noise: 5. As such, the DC servo is in the signal path So what would be the best practice of protecting typical op-amps like OPA1662, OPA1652, OPA1642, OPA1678, NE5532, TL074, RC4580 etc from input overvoltage in typical audio input scenarios? Op-amps can often have different types of internal diode protection between inputs and/or to the rails - do these op-amps have it, and if so, does it protect them It will allow you to stream your music with ease while enjoying excellent sound quality, all controlled via a high-quality LCD screen and an ergonomic interface or from a dedicated mobile application. design guide mentiones "good" grounding , without being more specific. 2 NVME 3. Mentions; Tags; More; Cancel; Ask a related question. 2010 The OPA1642 is dual, totally it used 7 for this application, what it showing part of them, U720-C,U721-C are the power supply for U720, U721. Any superior alternatives would be welcomed 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. High-Perforamnce,JFET-Input AUDIO OPERATIONAL AMPLIFIERS OPA1642: 679Kb / 31P [Old version datasheet] SoundPlus JFET-Input, Automotive-Grade, Audio Operational Amplifiers OPA1642-Q1: TI is committed I’d like to understand what the date code “1714+5” means. Its most interesting characteristic is the Butler input stage which combines bipolar and JFET devices. 37 Kbytes. I had much less noise using the OPA1642 in my old Technics amplifers phonostage, and was impressed with the sound quality. The OPA1641, OPA1642, and OPA1644 rail-to-rail output swing allows increased headroom, making these devices ideal for OPA1642 Dual SoundPlus™ JFET Audio Op-Amp O1642A SOIC-8 Texas Instrume di Tokopedia ∙ Promo Pengguna Baru ∙ Cicilan 0% ∙ Kurir Instan. Originally we used OP 275, we adopted OPA 1642 for recent lot. Thank you! we use the OPA1642 OPAMP in a multi channel audio messurement system. File Size: 764Kbytes. Features include 5. All payment options available OPA1642 OPA1644 www. The OPA1642 is also So changing opamp won't necessarily improve sound quality nor performance. We do not vet any members. The idea is that the bipolars give accuracy and low noise, while the JFETs give speed and ‘the sound quality of JFETs’. 00005% at 1 kHz • High Slew Rate: 20 Other Parts Discussed in Thread: OPA134, OPA1642. 00005% at 1 kHz • High Slew Rate: 20 Forum Home Amplifiers Solid State Pass Labs Tubes / Valves Chip Amps Class D Power Supplies Headphone Systems. 8mA per channel. The OPA1642 I don't care for very much to be honest. Search; User; Site; Search; User; E2E™ design support > Forums. It measures better to, with LM4562, but the difference is much smaller than the sound The only device where I really noticed that an expensive opamp might make sense is the Matrix HPA-3B where the difference between SS V6 Classic and the default LME49720 was very obvious with sensitive cans (I'm OPA1642. T. Thank you for your patience. I now have noise level of -93 dB , THD The next section will focus on choosing the right audio amplifiers based on the application and end equipment. Low noise opamps need to be In my opinion, it's the best sounding of the OPA16x2 series including the bipolar input OPA1662. Featured Vendors The diyAudio Store; Parts Connexion; Mini DSP; DIY Hifi Supply; Elekit; " is a bit easier said than done. Aftermarket Head Units Because of the holidays, TI E2E™ design support forum responses will be delayed from Dec. Description: High-Performance, JFET-Input AUDIO OPERATIONAL AMPLIFIERS. Could you please help to me how to select operational amplifier for audio line-out or line-in or differential output? which op-amp parameters should be considered? OPA1642 datasheet, OPA1642 pdf, OPA1642 data sheet, datasheet, data sheet, pdf, Texas Instruments, Sound-Plus High-Performance, JFET-Input Audio OpAmps | Home | All manufacturers | By Category | FR: DE: ES: IT: PT: RU: Part name, description or manufacturer contain: Quick jump to: 1N 2N 2SA 2SC 74 AD BA BC BD BF BU CXA HCF IRF KA KIA LA WANTED: Happy members who like to discuss audio and other topics related to our interest. 25 through Jan. Marketplace. 00005% at 1 kHz • High Slew Rate: 20 i have mixed some 24 bit tracks done at 192k 32 float into 32 bit 384 k tracks and i get nearly the same bandwidth as on the original records of the individual tracks ,. For my understanding, this forum is pushing the second approach. 00005% at 1 kHz • High Slew Rate: 20 OPA1642 OPA1642 SR - Slew Rate: 20 V/us 20 V/us Standard Pack Qty: 250 2500 Subcategory: Audio ICs Audio ICs Supply Voltage - Max: 36 V OPA164x/OPA164x-Q1 op amps offer superior sound quality and rail-to-rail output swing that allows for increased headroom, making these devices ideal for any audio circuit. The OPA164x/OPA164x-Q1 op amps operate over a In digital audio clocks and timing are EXTREMELY important to sound quality. 2 X OPA1642. 00005% at 1 kHz • High Slew Rate: 20 Yes, most JFET input amplifiers, like OPA1642 and OPA2134, do NOT need back-to-back input protection diodes – they are self-protected. Page: 21 Pages. 8 mA OPA164x/OPA164x-Q1 op amps offer superior sound quality and rail-to-rail output swing that allows for increased headroom, making these devices ideal for any audio circuit. Ask a new question Ask a new question Cancel; State; Locked Locked Replies 2 replies Subscribers 31 subscribers In the first case you create a "music instrument" like different piano brands or even pianos have a different (brand) sound. it may be the data that supports 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 datasheet] SoundPlus 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. Page: 22 Pages. 6V) and short to GND? There is no specific microphone spec currently. My Technics SU-V9 is having relay issues, and needs a recap, and possible opamp change. Part #: OPA1642. the 384k 32 bit tracks sound very good listening to them with the emu 1212m that is 24 it 192, going thru a headphone amp and good pair of top end headphones, sony's the ear http://www. The OPA1652 datasheet is on my list to revise, but I'm currently working on the OPA1642 as mentioned above. 33K TI E2E support forums The OPA1641 (single), OPA1642 (dual), and OPA1644 (quad) series are JFET-input, ultralow distortion, low-noise operational amplifiers fully specified for audio applications. When the related question is created, it will be automatically linked to the original question. 00005% at 1 kHz • High Slew Rate: 20 Part #: OPA1642. May be 828 will be better, but i have to do some thing in the board to extract In my experience, the lower the noise the more 'air' in the soundstage so I would recommend OPA1642 its noise is way lower than OPA2604. The input stage is set up as a unity buffer with a bootstrap for high input resistance. Hello, I have on hand 3 OPA1642s. To accomplish this, I designed this schematic using the OPA1642 audio op amps. USB-A Port: USB3. The OPA1642 rail-to-rail output swing allows increased headroom, making this device. Audio Audio forum. IME they are very good audio opamps, but a possible weak point may be their sensitivity to radiated RF. File Size: 679Kbytes. Don't mean to be ungrateful but OPA2107 seems to be an easier option now especially still not sure how others rate the sound quality of OPA1642. Because the first one has to do with emotions. Featured Vendors The diyAudio Store; Parts Connexion; Modern audio opamps usually need ceramic decoupling to prevent any chance of high speed oscillation - older opamps generally didn't and old circuits don't always have this decoupling for Audio Amplifiers Dual automotive soundplus™ high-performance, JFET-input audio op amps 8-VSSOP -40 to 125 +1 image OPA1642AQDGKRQ1 Part Number: OPA1642 Other Parts Discussed in Thread: DIP-ADAPTER-EVM, OPA2134, RC4558, TL072. Thread starter JktHifi; Start date Apr 16, 2023; J. For my self, I have a Tube amplifier and a Purifi . Features include 5. The current noise paired with high SUPERIOR SOUND QUALITY. Forum Donor. Page: 31 Pages. Those were the D. The. Bass Off: Bypasses bass circuit, decreases interference and noise floor so as to 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. 00005% at 1 kHz • High Slew Rate: 20 Part Number: OPA1642 My question is what is a ballpark number for the capacitance of the ESD diodes inside the OPA1642 op-amp. Manufacturer: Texas Instruments. 860. Are there any special precautions that have to be considered while dealing with OPA1662s? I am an electrical engineer designing hi-end audio preamplifiers for the past 20 years. The NE5532 sound great, but you need to solder a 100nf quality ceramic cap between the +/- rails to prevent it from exibiting it's own peculiar oscillation. 5nV/√ Hz noise density with an ultralow distortion of 0. The opa1678 looks like a better chip, as well and it's less than a buck. Below is some feedback from Lester from SylphAudio “If you use OPA1656 / OPA1642, the SINAD will get 1dB to 2dB more because of fet input lower noise on higher value source resistors. 1 nV/√ Hz at 1 kHz; Ultralow Distortion: 0. Some members in the Pass Labs forum section used my design in their First Watt clones with the same conclusion. diyAudio provides this forum for the convenience of our members, but makes no warranty nor assumes any responsibility. Basically, any The X5 3rd gen utilizes two dual-channel OPA1642 chips for its low-pass filtering stage and a custom-made audiophile-grade OPA426 chip for amplification, providing greater power output (up to 300mW under a 32Ω load) and greater ability to deal with capacitive loads. I reached out to the 'ti-counterfeit@list. 1nV/√Hz noise, low THD+N (0. Regards, Richard . There are 12 Channels on the board. OPA1642. The OPA1642 is not a 'cheap' amplifier, but it is very clean, and seems to behave well, even in a non-inverting application. gain at low frequencies. They'll say the OPA2134 "sounds dark" for example. - SUPERIOR Sound Quality - True JFET Input Operational Amplifier - With Low Input Bias Current - Low Noise: 5. When I do serious listening test between them, just an A - B testing, not back and forth, I found the OPA1642 Tried in this place OP275, OPA1612, OPA1642, OPA1656 and OPA828. Sep 20, 2023 #3 Apollon NCx500ST Stereo Amplifier Review LG 77C1 - Marantz SR7005 - Apollon NC502MP+NC252MP - Monitor Audio PL100+PLC150+C265 - SVS SB-3000 3. The current noise paired with high http://www. I soldered OPA1642 today to my card with 8 small wires. com SBOS484B – DECEMBER 2009– REVISED AUGUST 2010 ™ High-Performance,JFET-Input AUDIO OPERATIONAL AMPLIFIERS Check for Samples: OPA1641, OPA1642, OPA1644 1FEATURES DESCRIPTION 234• SUPERIOR SOUND QUALITY The OPA1641 (single), OPA1642 (dual), and • TRUE JFET INPUT OP AMP OPA1644 (quad) 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. Joined 2021. 2. Heavily compensated for audio so they will remain stable, not only that it’s also stable at unity gain and operates within +/- 18VDC. ” However, as we are in the “DIY Audio Forum”, I recommend the Sylph-D100 P02 amplifier module. Part Number: OPA1642 Other Parts Discussed in Thread: OPA1652 , OPA1662 , OPA2141 , NE5532 , OPA1678 , OPA1679 , OPA1688 Hello, I was looking for information TI E2E support forums Search 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 • High Slew Rate: 20 Part Number: OPA1642 Other Parts Discussed in Thread: OPA1652. Doodski Superior Sound Quality; True JFET Input Operational Amplifier With Low Input Bias Current; Low Noise: 5. Mids and details are sharp, analytical. OPA1642 Dual sound-plus high-performance, JFET-input audio op amps. 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. 00005% at 1 kHz • High Slew Rate: 20 http://www. We made 10 units of the same, of which 5 units failed OPA 1642. Recently, while dealing with 1662s , I came up with a few damaged prototypes (damaged 1662s). The OPA1642 has much lower current noise and better 1/f noise than the OPA1656. Instrumentation amp configration at the balanced input, but filters are unbalanced. 00005% at 1 kHz • High Slew Rate: 20 The OPA1642 has much lower current noise and better 1/f noise than the OPA1656. Output Current characteristic curves seem to behave in opposite manners. 00005%), a low input bias current of 2pA and low quiescent current of 1. Not sure a guitar effect could do it justice. com Im Part Number: OPA1642-Q1 Other Parts Discussed in Thread: OPA1642 Tool/software: Hi TI Expert. The OPA1656 has higher Iq but also higher gain bandwidth and very low THD+N. Last edited: 2010-01-18 4:37 pm. 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 - High Slew Rate: 20 V/µs - Unity Gain Stable - No Part #: OPA1642. 1 nV/√Hz at 1 kHz - Ultralow Distortion: 0. With that in mind, matching source and feedback resistance is no longer The OPA1641 (single), OPA1642 (dual), and OPA1644 (quad) series are JFET-input, ultralow distortion, low-noise operational amplifiers fully specified for audio applications. The second stage is set up to provide gain anywhere from 1/10*Vin 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. [Old version datasheet] High-Perforamnce,JFET-Input AUDIO OPERATIONAL AMPLIFIERS OPA1642: 679Kb / 31P [Old version datasheet] SoundPlus JFET-Input, Automotive-Grade, Audio Operational Amplifiers OPA1642-Q1: 679Kb / 31P [Old version datasheet] SoundPlus JFET-Input, Automotive-Grade, Audio Operational Amplifiers OPA1642AID: 742Kb / 22P [Old version 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. The OPA1641, OPA1642, and OPA1644 rail-to-rail output swing allows increased headroom, making these devices ideal for Part Number: OPA1642-Q1 Other Parts Discussed in Thread: OPA1642. Decent quality audio amplifiers all sound the same anyway, as long as they're not driven towards the point of The OPA 1642 is adopted for this circuit. Similar Forum Home Amplifiers Solid State Pass Labs Tubes / Valves Chip Amps Class D Power Supplies Headphone Systems. s at the "heyday " of audio in EW are appearing here and divided audio designers into two camps . ti The OPA1656 (gain bandwidth product, GBW=53-MHz) and OPA1642 (GBW = 11-MHz) have a different bandwidth and we would need analyze the complete audio active crossover circuit to analyze stability and determine the issue. Recently I changed OPAmps in my Purify amps and noticed huge difference. The currenty is AN6552. I've seen people use OPA1642/1644 a replacements for the NJM4580s and TL074s on these amps. SSD: M. 0 2280 protocol, up to 4TB. This is a more expensive chip than Opa1642 used in Eversolo dmp 6. Part Number: OPA1642 Any chance the OPA1642 in inverting mode is stable at 1/3 gain? R1 is 10K feeding the negative input and R2 the feedback resistor is 3. It's a better chip. AD or In the case of Aiyima a04 ( I have two of them ) it is very clear that the sound quality gets better with LM 4562 instead of NE5532. Anything can be adapted to anything, even 8 pin dip to 8 pin soic. 00005% at 1 kHz • High Slew Rate: 20 Superior Sound Quality; True JFET Input Operational Amplifier The OPA1641 (single), OPA1642 (dual), and OPA1644 (quad) series are JFET-input, ultralow distortion, low-noise operational amplifiers fully specified for audio applications. #3 NE5532 is dual channel opamp, so you can try few of 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. OPA164X = jfet and lowest noise. What is a related question? A related question is a question created from another question. Can you provide any figure to show the input rail to rail when single supply use case like as following figure(NE5532)? Also, could you please let me know other recommended devices for input rail to rail that can support around 0V input? Conditions : +12V (single supply) offset : +1. Andrea: Member. Apr 16, 2023 #1 Forum Style A fair question! And although I was the product definer and systems lead for this part, I don't get 100% control over the marketing folks 😉 But, I can honestly say that when we started working on this part about a year ago, I was very adamant that I didn't want to create a part with excellent specs but terrible sound quality in the real world. so I took your advise and ordered a pair of OPA1642. When the related question is created, it will be automatically Audio Audio forum. Quote OPA1642 Sound-Plus High-Performance, JFET-Input Audio OpAmps The OPA1641 (single), OPA1642 (dual), and OPA1644 (quad) series are JFET-input, ultralow distortion, low-noise operational amplifiers fully specified . Download. The BA4560 has a lot of noise vs the OPA1642, and both the old have higher distortion. I can get an adapter for the OPA1642 or any other TI opamp that would suit the circuit. I put together a table below showing devices that have high input impedance and some key parameters for comparison. Keep in mind that audio amps are just one part of the audio channel as a whole. I wonder , if the following would be reasonable to apply: In an active XO/EQ design, we use OPA1642 for Sallen Key filters. The outstanding sound Site Site Announcements Forum Problems & Feedback Terms and Rules. I can understand why people, like the 627, might feel it sounds 'thin'. I’d like to understand the difference I’m seeing in date code listed. Part Number: OPA1642 Other Parts Discussed in Thread: OPA4H014-SEP Does anyone know if there exists a radiation testing report for the OPA1642 (either TID or single. SIY Grand Contributor First post on this forum not looking for an argument. ti. (800) 346-6873 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. P/N OPA1642AIDR was procured twice, once with a date code reading "1714" and once with a date code reading "1714+5". S. Use case : Audio amp Improved sound performance. 65V. Joined Mar 9, 2023 Messages 387 Likes 200. File Size: 764. 1. Mouser offers inventory, pricing, & datasheets for OPA1642 Series Audio Amplifiers. 2021-09-24 5:06 am #566 2021-09-24 5:06 am #566 If it was actual audibly different sound quality, it OPA1642, OPA140, and OPA827 all use a similar FET front end, designed not to exhibit the nonlinear junction capacitance that classical FET input architectures do. com/product/OPA1642, the OPA1642 can be used fully diferential (balanced) to a studio monitor or amp, just like the I have OPA1642 on my amplifier too so this is very much laidback sound. Search. Can anybody Forum. Jan 8, 2020 #6 Agreed. scyisi uelcis xoprcr gnmpi rprv powplba invtk itw uzlmdim ucjvb