ESR of Capacitor

Hi,

I have a few questions regarding ESR of capacitor:

1. How to calculate ESR from datasheet?

2. for most low ESR capacitor, there are in SMT package. The problem is, I need to do breadboard prototyping, which SMT will be very inconveniece. how to get around with that?

Thanks

janetsmith2000@yahoo.com said:

Hi,

I have a few questions regarding ESR of capacitor:

1. How to calculate ESR from datasheet?

Click to expand...

You don't!, it should be listed in the datasheet - failing that you measure it.

2. for most low ESR capacitor, there are in SMT package. The problem is, I need to do breadboard prototyping, which SMT will be very inconveniece. how to get around with that?

Click to expand...

I would have thought exactly the opposite?, SMT electrolytics are much smaller than conventional ones, and ESR is generally improved with larger capacitors - it's also advantageous to use a higher voltage electrolytic as well, a 470uF 63V will have a lower ESR than a 470uF 16V.

janetsmith2000@yahoo.com said:

Hi,
2. for most low ESR capacitor, there are in SMT package. The problem is, I need to do breadboard prototyping, which SMT will be very inconveniece. how to get around with that?
Thanks

Click to expand...

Just solder some wire onto either side of the SMT package.

you can also buy / make SMT to DIP adapters (maybe you can't buy one for a resistor though).