monolithic low pass filter

[merco]

hi,
i have some MAX7407,MAX7427,MAX280.
I'd like to know whic is the better for designing a low pass filter (4
Hz)... and how can i do: some schematics ?

thanks

 

[teraze]

i recommended you can use some filter design software to facilitate
your design.
and do the simulation through spice

 

[merco]

ok, i'm using ltspice... but i can't find models of those ICs...

 

[Joseph2k]

hi,
i have some MAX7407,MAX7427,MAX280.
I'd like to know whic is the better for designing a low pass filter (4
Hz)... and how can i do: some schematics ?

thanks

And just what is prohibiting you from at least trying Maxim semiconductor's
web page?

 

[merco]

nothing, but i didn't find it in Maxim web page... do you ?

 

[Joseph2k]

nothing, but i didn't find it in Maxim web page... do you ?

I took "maxim" too google and the secoond result was
"http://www.maxim-ic.com/"
google is your friend.

 

[merco]

yes i know but
no spice models nor filter software...

 

[Joseph2k]

yes i know but
no spice models nor filter software...

Yes, i found (at least one of) the parts, and no i did not find spice
models. However i did find enough for me to attempt to build spice
models, and with actual devices to experiment with i could probably obtain
a useful model in about two weeks full time. After all there is a limited
number of easily tuned (resistor or clock settable) 8th order elliptical
filters. Read the datasheet very carefully.

 

[merco]

thanks il''try, nut i think that fc=4Hz and Fo=15 Hz are very strange
values...