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LT1057,-1058, etc. what your opinion about the Opamps? can anyone give lowcost source for order via internet?
regards
regards
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Hi KT315,Originally posted by kt315 View Post
LT made all nice stuff... very nice op. amps.
Real problem is finding them ... not so easy. But you can try with big companies like farnell: www.farnell.com.
You need a credit card to buy... then have to provide the informations they ask for.
I don't know if you can order from your country... but I think you can by their finland based center. You could also order by Russia I think.
They have great stocks of LT parts cause they are used widely into the industry... much more than as discrete parts for DIY.
Problem is that they are often not so cheap... for example one LT1057 will costs 3-5eur and 1058 maybe 8-9eur by farnell... not popular prices I think... but they, to me, are worth each cent.
Best regards,
Max -
As far as i know m/lab use LT1057 in there integrater ccts on there SD2000.
ZEDComment
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Nice Part
Yes 1057 is a nice part.
low power, low offset, low bias current, no phase reversal,
good bandwidth.
Can see why someone would want to use this for an integrator
where you integrate the input voltage offset as well as the input
bias current.
Phase Reversal Protection
Most industry standard JFET input single, dual and quad
op amps (e.g., LF156, LF351, LF353, LF411, LF412,
OP-15, OP-16, OP-215, TL084) exhibit phase reversal at
the output when the negative common mode limit at the
input is exceeded (i.e., below – 12V with ± 15V supplies).
The photos below show a ± 16V sine wave input (A), the
response of an LF412A in the unity gain follower mode (B),
and the response of the LT1057/LT1058 (C).
The phase reversal of photo (B) can cause lock-up in servo
systems. The LT1057/LT1058 does not phase-reverse
due to a unique phase reversal protection circuit.
http://www.linear.com/pc/downloadDoc...00,P1260,D3824Comment
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