S
Steve
I am designing low and high pass op amp (+/- 15V) based active filters
near 1 Hz that require capacitor values between 1 and 10 uF. Are
there any reasons to not use surface mount multilayer ceramic chip
capacitors in such a design ? Is capacitance change with voltage an
issue ? The filters will be used at room temperature with little
temperature variation.
Multilayer ceramic chip capacitors are available in values to 10 uF or
higher with +/- 10% tolerances and lead spacings of a few millimeters
for $1. Is it better to use metalized polypropylene or metalized
polyester even though they are more expensive and have much larger
lead spacing (up to 1 inch) ? Examples inlcude Panasonic ECQ-E(B) or
ECQ-E(F) series and Epcos MKT series, available at 5% or even better
tolerance.
Thanks,
Steve
near 1 Hz that require capacitor values between 1 and 10 uF. Are
there any reasons to not use surface mount multilayer ceramic chip
capacitors in such a design ? Is capacitance change with voltage an
issue ? The filters will be used at room temperature with little
temperature variation.
Multilayer ceramic chip capacitors are available in values to 10 uF or
higher with +/- 10% tolerances and lead spacings of a few millimeters
for $1. Is it better to use metalized polypropylene or metalized
polyester even though they are more expensive and have much larger
lead spacing (up to 1 inch) ? Examples inlcude Panasonic ECQ-E(B) or
ECQ-E(F) series and Epcos MKT series, available at 5% or even better
tolerance.
Thanks,
Steve