The opa627 and opa637 difet operational amplifiers provide a new level of performance in a precision fet op amp. Opa1612 datasheet, cross reference, circuit and application notes in pdf. It bears the sonic signature of its bigger brother, the v5 discrete opamp, considered by many as the reference in audio application. Opa627bp texas instruments integrated circuits ics. Texas instruments opa1612 dual bipolarinput operational amplifier achieves very low 1. To meet this requirement we changed the iv and lowpass filter opamps from lm4562 to opa1612. The measurement technique can, however, be performed with manual distortion.
The opa 1622 is the newest member of the popular burr brown audio family, which ti took over in 2000. Amb laboratories diy audio forums view topic opa627 vs. The opa1641, opa1642, and opa1644 railtorail output swing allows increased headroom, making these devices ideal for use in any audio circuit. With a slew rate of 55 vus, the opa627 demands very careful. Opa1656 and opa1612 without tweaking have better performance than. Pricing and availability on millions of electronic components from digikey electronics.
Opamp based high accuracy mm\mc phono preamp diy audio. Input voltage noise spectral density 1k 100 10 1 1 frequency hz v voltage noise nv hz 10 100 1k 10k 100k 1m 10m voltage noise vs source resistance source resistance. The repair guy has stated the the final burr brown op amp in the series is shot and wants to replace it with a njm 2068 which is also low noise. I wanted to experiment with some of the more modern op amps to see if they could improve on the sound of the lf353. Opa1622 soundplus highfidelity, bipolarinput, audio operational amplifier 1 1 features 1 highfidelity sound quality ultralow noise.
September 5, 2019 a curiosity full of tubes and compromises. My boozhound labs\jean miraga mm\mc stage have been in heavy use for some time now. The opa1611 and opa1612 offer railtorail output swing to within 600 mv with a 2k. Opa161x soundplus highperformance, bipolarinput audio. Designing and building discrete operational amplifiers is a fascinating business for me. Opa627 and opa637 precision highspeed difet operational. I too find that the opa1612 and opa1642 are fantastic upgradereplacements in a whole lot of professional and consumer audio gear out there equipped with comparatively outdated opamps. Opa1611 opa1612 1features description 23 superior sound quality the opa1611 single and opa1612 dual ultralow noise. Opa1612 precision operational amplifier texas instruments. But lately i have been using a very simple opamp based preamp developed b. Im very happy with your opamp and it really sounds amazing.
These sound great and outshine many of the other modern high performance audio opamps out there today. Leckerton audio uha4 volume matched using a spl meter to wihtin 0. Ive used the 8620 from analog devices in a headphone amplifier ive built. My boozhound labs\\jean miraga mm\\mc stage have been in heavy use for some time now. In the final analysis i dont believe that current digital volume, even ours, compares to highend analog types. When compared to the popular opa111 op amp, the opa627 has lower noise, lower offset voltage, and much higher speed. The opa 1612 and the 1642 is to my ears better than the 24. Opa1612 data sheet, product information and support. If you still want to go with njm2068 ask this guy about supply voltage since opa24 starts at 5 volt minimum while nmj2068 starts at 8v minimum. Xfi prelude comparison a few threads down and i basically concluded from that the ad8620 might be considered better than the default lm4562. Pricing and availability on millions of electronic components from digikey. Opa627bp texas instruments integrated circuits ics digikey. Burr brown opa 2143 vs njm2068 i have a primare cd 21 that needs repair.
From all of those and the ones i have tried in my ppa i would only choose the opa627 for the ground channel, not for the l and r and the opa637 for the l and r, the rest will sound inferior imho, of course im talking in my ppa, in any other application. Its a 436 page monumental effort in the form of a huge 35 mb pdf which is. The newly developed burson v5i is a hybrid audio opamp, which is both partially ic and discrete. Opa1612 is fuller sounding especially lower midrange but also more dynamic. Searching for a opa627 opamp i found burson audio web page. Opa627, opa637 sbos165a september 2000revised october 2015 opa627 and opa637 precision highspeed difet operational amplifiers 1 features the opa6x7 is fabricated on a highspeed, dielectricallyisolated complementary npnpnp 1 very low noise. The opa1612 offers railtorail output swing to within 600 mv with a 2 k. The opa637 is stable in gains equal to or greater than five. The company motto is to make hifi affordable by following the rules of in their words qualityoriented, customercentered and constant. Opa627bp general purpose amplifier 1 circuit 8pdip from texas instruments. Please see the technical highlightssection and the. The opa1611 single and opa1612 dual bipolarinput operational amplifiers achieve very low 1.
Alternative to opa1612 find opa1612 alternatives at. According dooblets users the best alternative for opa1612 is opa1642. Ive built quite a number of phono preamps including two diferent ones from oatley electronics tube\\jfet, silicon chip and boozhound labs. That said, a few people consder the opa637 an upgrade from the ad8620. The b4x is the most expensive though, at about a 40% premium over the basic b4. The op amp choices have been narrowed down to the opa1662 and opa1652 and maybe the opa1612. And opa1642 has a bit better soundstage i dont know why. It is the successor to the wellknown and renowned opa 1612. This is the follow up with more technical information, a summary of many popular op amps, and some of the measurements i made. A dual op amp is preferred and single supply capability is a plus. Opa1622 soundplus highfidelity, bipolarinput, audio. The second time i did test with opa1656 and opa1612.
Burrbrown precision highspeed difet operational amplifiers,alldatasheet, datasheet, datasheet search site for electronic components and semiconductors, integrated circuits, diodes, triacs, and other semiconductors. Texas instruments has launched a new audio opamp claimed to be the new standard for highend audio. Douk audio also known as nobsound, a subsidiary of shenzhen cavins technology co. Opa 1611 opa1612 any impressions audiogon discussion forum. Ti wideband, fetinput operational amplifier,alldatasheet, datasheet, datasheet search site for. Having used a net audio modified quad 4052 for the last twelve months complete with their excellent dual mono power supply, i was interested to learn that there was a superior op amp available for each of the quad 405s amplifier boards than the one net audio upgrade as standard, the burr brown opa604ap op amp. My system really is a rather modest one, using polk r30s and r15s with a cs101 center and definitive technologies prosub. Dec 17, 2015 texas instruments has launched a new audio opamp claimed to be the new standard for highend audio. Also comparisons of the opa627 and opa637 would be good. I would like to suggest opa1602opa1612 or lme49720 for different applications. I like the low noise aspect of it, though its pretty expensive.
The opa627 operational amplifier provides a new level of performance in a precision fet op amp. Ive never had any problems with the opa1612 and stability personally in a. These opamps are all in the easytosolder soic8 smd package. The opa1652 data sheet says it is a fetinput op amp which usually means it is jfet. The opa1641 single, opa1642 dual, and opa1644 quad series are jfetinput, ultralow distortion, lownoise operational amplifiers fully specified for audio applications. If youre not sure if amp belongs to this class download data sheet in pdf and check for thd vs frequency and thd vs output. Texas instruments opa1612 series audio amplifiers mouser. May 23, 2018 opa2156 sounds a little more detailed and a little grainy in comparison.
This is a generalpurpose opamp which will perform very well in various implementations. Opa627 pdf, opa627 description, opa627 datasheets, opa627. I truly love my m3 and cant imagine it getting any better, therefore im trying to improve it. A discrete opamp for high supply voltages, fully tested. Discrete opamps analog circuit design samuel groner. 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 lmes should work well in the eq stages but i would install machine sockets and compare the noise of the lme vs. It is useful in a broad range of precision and highspeed analog.
Ive built quite a number of phono preamps including two diferent ones from oatley electronics tube\jfet, silicon chip and boozhound labs. Opa2156 sounds a little more detailed and a little grainy in comparison. If youre not satisfied with the sound of the opa24, id first look at upgrading other components, like the caps, resistors etc. Opa1612 is generally slightly light weighted but very balanced otherwise. When compared to the popular opa111 op amp, the opa627637 has lower noise, lower offset voltage, and much higher speed. Audiophile replacement for the ne5532 who can handle. When compared to the popular opa111 op amp, the opa627 637 has lower noise, lower offset voltage, and much higher speed. Are opa16121656 better as per specs or on listening tests than opa627 i have now. From all of those and the ones i have tried in my ppa i would only choose the opa627 for the ground channel, not for the l and r and the opa637 for the l and r, the rest will sound inferior imho, of course im talking in my ppa, in any other application probably they will sound different, some of them better, some others more warm or bright, depending of what is a before and after, and the. Opa1612 precision operational amplifier soundplus highperformance, bipolarinput audio op amp from texas instruments texas instruments opa1612 dual bipolarinput operational amplifier achieves very low 1. I have 2 opa24s and a pair of opa627 in my bugle 2 phono, i replaced the. Although ic technology is mature, there are still situations where discrete design beats icstypical advantages of discrete amplifiers are potentially high supply voltages, high maximum dissipation, much extended options with respect to choice of passive components and the possibility to.
Burr brown opa 2143 vs njm2068 audiogon discussion forum. The op amp supplied with the chiarra kit is the lf 353 which is a design that stems back to the early 1970s. Texas instruments opa1612 series audio amplifiers are available at mouser electronics. Transients are stronger, both rimshots of snare drum and bigband trumpets. That said, burr brown opamps are generally a bit laidback sounding. Texas instruments opa627 series high speed operational. The analog devices ada4627 is essentially a second source version of the opa627. Opa1612 datasheet, opa1612 pdf, opa1612 data sheet, opa1612 manual, opa1612 pdf, opa1612, datenblatt, electronics opa1612, alldatasheet, free, datasheet, datasheets. Burr brown opamp op ic opa627sm 100% brand new perfect for audio pair triple quad or muti matched ics could be provided.
Available as a free download from the analog elab design center, tinati offers extensive post. You could probably replace 5532 with something similar from njmjrc or st or even. Overall, c421 both ad8620 and opa2227 version sounds more detail and specious than t5, while t5 has the unique rich and smooth tone that usually associated with balanced amp t5. Sep 05, 2019 douk audios other portable tube amplifiers. An opa1612 has slightly better specs than an lm4562less noise and distortion, faster, and more output voltage swing. The b4x isnt the only portable tube headphone amplifier option currently available from douk audio. It is useful in a broad range of precision and highspeed analog circuitry. Opa627 datasheet, opa627 datasheets, opa627 pdf, opa627 circuit. Highperformance,bipolarinput audio operational amplifiers check for samples. Input voltage noise spectral density1k100101 datasheet search, datasheets, datasheet search site for electronic components and semiconductors, integrated circuits, diodes and other semiconductors. Opa1642 data sheet, product information and support.