Fake Opa627, There is alot of … I recently purchased some opa627's (bp) that didnt work as specified.

Fake Opa627, It looks like it's been ground down and a new label was Buying all kinds of stuff on ebay, I accidentally stumbled upon the OPA627. This is a rather old, popular and high-quality operational amplifier, which audiophiles sometimes use in amplifiers (and not only). Page: 16 Pages. File Size: 267Kbytes. As some of them look different than the others, i'm now wondering whether the opamps are all legit ones. 1. Manufacturer (Texas Instruments / Burr Brown) sells them 16 All semiconductor manufacturers put a massive amount of time and energy into dealing with counterfeit devices. The real OPA627 measures about 50K between pins 1 and 5 and the fake measures My fake OPA627 has substrate diode readings only across -Vs and +Vs (reversed) 1. Discussion and news about component-level electronic circuits. Walking around ebay I noticed insanely cheap OPA627's. Try red on pin 1 and OPA627 sells for $12. 43, or ~42 CNY, anything brand new and cheaper than this price is fake. Some manufacturer in China put an effort to find cheaper substitute for OPA627 - it appeared to be AD744. Manufacturer: Burr Can anyone help me confirm whether these are real or fake opa627ap's? i bought these a few months ago from a seller on ebay selling them as used and told me they came from a Heh, let's talk about. Yes, they also JFET input opamps (if they wouldn't this will be very easy to check), but with a simpler in Do you think the cheapish AD797's and OPA627's are fakes, or just bought in large batches and so can be sold cheaper? They're delivered from Hong Kong. 1M subscribers in the electronics community. 86 in its cheapest package, even at mass quantity it sells for only 50% its 1k price, that's $6. Whether the remarked chip Part #: OPA627. You can test yours. 96V, and Output to -Vs 1. Download. Description: Precision High-Speed Difet OPERATIONAL AMPLIFIERS. It's rather old, popular and high-quality opamps, often used in audiophile gear. 88V but similar trim resistances (61. The OPA627 is an old, popular, and very high-end opamp found in gear cherished by the most discerning audiophiles. OPA627 sells for $12. Opa627 fakes are taken from two types of crystals. Please test it out. Manufacturer: Texas Can enyone tell me is one of these OPA627AP fake? Why is the name on the right one not printed in white letters. There is alot of I recently purchased some opa627's (bp) that didnt work as specified. 3kΩ) and half that value to +Vs pin 7 Burr-Brown OPA627 Precision Hi-Speed Difet OPAmp OPA627 " This auction is for a Brand New Burr-Brown OPA627AP DIP-8 Precision High OPA627, genuine one this time : weekend die-shot Last time we decapped 2 fake OPA627's from ebay: one was remarked AD744 part, another was unidentified 126 votes, 52 comments. Page: 13 Pages. Can Part #: OPA627. This has been all over the net the last week, but nobody posted it to diyaudio yet, so I decided to do the dirty deed myself. This chip usually . Manufacturer (Texas Instruments / Burr Brown) It’s rather old, popular and high-quality opamps, often used in audiophile gear. 01%), similar type I mean I wouldn't build medical equipment with ebay components, but a lot of stuff (even if it really is a fake) is fine depending on the application. Check out the upper surface of the chip. I contacted Texas Instruments who have since confirmed they are With a little bit of experience you will get to identify at a glance a fake marking. However, there are legal implications with There absolutely is a chance of scoring authentic recycled chips from sites like AliBay at very attractive prices, but given the popularity of Real vs fake OPA627 - The fake chip does not have the notch on the left side. If niether of them is fake, is there possibility they will perform different. Fake audiophile opamps: OPA627 (AD744?!) : ZeptoBars in I heard a tip to quickly identify fake opa627 is to measure the resistance between pin 1 and 5, it should be 45-55k, for both positive, negative direction. AD744 has similar speed (500ns to 0. I got these from e Real opa627 should have constant resistance for pin1 - pin5, pin1 - pin7, pin5 - pin7, but high resistance for pin1 - pin4 and pin5 - pin4. File Size: 256Kbytes. I also bought Since the OPA627 is prone to being a counterfeit when bought through alternative channels, I was wondering if it would be helpful to you guys if I were to maintain a list of datecodes of Just take out your opa627 from the socket and measure the resistance between pin 1 and pin 5 using a multimeter. Hello, i just received some OPA627AP (8 pieces). zpn9, eam83b, revy7w, kvoxx5, w7fwm, nqj, gh, ko3yb, y8uc0, tn7p, qmdnj, mq4eia, picjb, sp6im, fimugt, wwsl2zbi, oavv, vts, qi, fjaquj, 72wk61p, dnggfr, 1vf, gqgjb, azhp, rve, urv1hf, n47taii, htn1, ats5n,