Originally posted by sinko1
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LF357 substitude
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TLE2081 http://www.ti.com/product/tle2081 (same pinout)
TLE2071 http://www.ti.com/product/tle2071 (same pinout)
OPA637 http://www.ti.com/product/opa637 (different pinout)
OPA627 http://www.ti.com/product/OPA627
Maybe AD8091 (http://www.analog.com/media/en/techn...D8091_8092.pdf)
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https://www.ebay.co.uk/itm/LF357N-IN...from=R40&rt=nc plenty pthers lf357variants on here to including genuine to99 case https://www.ebay.co.uk/itm/LF357H-In...from=R40&rt=nc
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Originally posted by qute1 View Posthttps://www.ebay.co.uk/itm/LF357N-IN...from=R40&rt=nc plenty pthers lf357variants on here to including genuine to99 case https://www.ebay.co.uk/itm/LF357H-In...from=R40&rt=nc
Apart from this, how can be sure that these parts are original when the main manufacturer has stopped their production?
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Originally posted by kt315 View Post
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"I can not buy from eBay directly, because it is an American company and my country is under sanction." what country because despite what others may tell you i have not had any fakes from ebay as long as went with premium seller in uk (have to be careful as lots are drop shippers now and that is where you get fakes) and pay a realistic price not just the cheapest we have a saying here " you pay peanuts, you get monkeys..." sorry you are under sanction but if you can get ad797 it will work adeqautely and there are few fakes of this chip as there would be no point as at 450mhz bw it will be apparent in short order if its a duffer the noise levels would be ridiculous.
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I can not buy from eBay directly, because it is an American company and my country is under sanction
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again deeply delusion. America does nothing from chips. it is the capitalistic system and if you learned every capitalist is dreaming to
retransfer a manufacture in a state with low salary.
you must read Das Kapital Capital of Karl Marx.
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Originally posted by qute1 View Post"I can not buy from eBay directly, because it is an American company and my country is under sanction." what country because despite what others may tell you i have not had any fakes from ebay as long as went with premium seller in uk (have to be careful as lots are drop shippers now and that is where you get fakes) and pay a realistic price not just the cheapest we have a saying here " you pay peanuts, you get monkeys..." sorry you are under sanction but if you can get ad797 it will work adeqautely and there are few fakes of this chip as there would be no point as at 450mhz bw it will be apparent in short order if its a duffer the noise levels would be ridiculous.
regarding fake parts, I did not check the seller, if it is UK, therefore yes you are right, most likely they are genuine chips. But the real price for this component is less than 2.0USD, but because of the shortage it is high now. I have also bought AD797 some time ago but it seems that part is also fake :-)) anyway AD797 is not a Jfet or BiFet opamp, besides it does not offer a high gain, but it offers a high bandwidth.
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Originally posted by kt315 View PostI can not buy from eBay directly, because it is an American company and my country is under sanction
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again deeply delusion. America does nothing from chips. it is the capitalistic system and if you learned every capitalist is dreaming to
retransfer a manufacture in a state with low salary.
you must read Das Kapital Capital of Karl Marx.
Other non-US companies also afraid of doing businesses directly, such as AliExpress or Alibaba or similar, because they afraid to falling in trouble with the US laws and penalties. people are the only victim of politics.
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There are legit component suppliers even in China, buy from big distributors and not from aliexpress or ebay.
examples: cogobuy, allchips
The most important thing is the purpose for LF357, not knowing the circuit it’s hard to say what replacement is good.
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