hi, i bought on ebay china some TL082CP apparently made by Ti... the actual problem is that i'm not sure these are real TL082, i suppose they are LM358 or something REALLY cheap
why?
because i've found some behavoiurs that really belong to LM358 and not TL082, for example::
- 1 mA of consuption for entire package (seems low)
- 8 nA (calculated) coming out of the + input if arranged as voltage follower (it slowly charged a 10uF cap already taken at 5V and i measured the "rise time" on a known cap)
- crossover distortion (i don't remember very well but it was pretty visible on a 2k (?) load)
- ability to output down to GND
my questions are::
am i crazy or there really is some possiblities that these are counterfeits? (again... china)
is there some bombproof test for knowing if these markings are "sincere"?
the upper code is the same for all chips and
i don't think this is a good foam for JFET devices
why?
because i've found some behavoiurs that really belong to LM358 and not TL082, for example::
- 1 mA of consuption for entire package (seems low)
- 8 nA (calculated) coming out of the + input if arranged as voltage follower (it slowly charged a 10uF cap already taken at 5V and i measured the "rise time" on a known cap)
- crossover distortion (i don't remember very well but it was pretty visible on a 2k (?) load)
- ability to output down to GND
my questions are::
am i crazy or there really is some possiblities that these are counterfeits? (again... china)
is there some bombproof test for knowing if these markings are "sincere"?
the upper code is the same for all chips and
i don't think this is a good foam for JFET devices