Precision High Speed Integrators. LF/ LF/ LF/. Units. LF LF/ LF • Fast D/A and A/D Converters. LF (AV=5). • High Impedance Buffers. 28 Apr The circuit designed by an LF chip which I think is obsolete now. The input signal to the LF is something like this and the frequency. 9 Aug it seems the LF is obsolete and can not be found easily except fake ones. it is a good opamp but it is not under production it seems.

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So please give a link to the other thread and make clear what properties are really needed. The following users thanked this post: Kleinstein Super Contributor Posts: The LF is a rather old design.

VanitarNordic on August 10, The AD could perform even better if it is externally decompensated however it would require changes in the offset null circuitry if used. Using 2 amplifier stages instead of 1 with very higher gain eases the requirements on GBW quite a bit.


There was an error while thanking. David Hess on August 09, The LF is a decompensated LF with a minimum stable gain of 5.

StillTrying on August 10, Hero Super Contributor Posts: We had that discussion before. For a small signal level low noise might be more important than high GBW – quite some choices here if they can be slower. Hero on August 09, StillTrying Super Contributor Posts: As far as I understood fl357 the other thread, the LF was not such a good choice anyway.

It’s fast because it’s de-compensated, but not that fast to really need it. If offset null is required, then it needs to use pins 1 and 5 and go to the positive supply. David Hess Super Ld357 Posts: Please login or register.

LF substitude – Page 1

The LF is a low power LF The LT is very close and should be a drop in replacement with improved performance. For most applications, there are suitable and likely better replacements.


Just to add to all the confusion. VanitarNordic Regular Lg357 Posts: Did you miss your activation email?

LF357N – LF357 JFET Input Op-Amp

So the high BW is not absolutely needed as an 2 stage amplifier would be a real alternative. No need to repeat the old discussion – things have not changes since last year.

August 09, August 10, Does it need to be in a dual llf357 line package through hole? I don’t think there’s enough info as usual! From the old thread the application is rather low frequency and very high gain. VanitarNordic on August 09, Kleinstein on August 09,