PWM filter... does it matter which cap?

[brutus]

Hi,

I want to change a PWM into a smooth analog signal. I have the circuit, but I was wondering if it mattered what capacitor I would be using.

I want to use a ceramic cap... does it matter?

The PWM is a 100 KHz square wave.

 

[indulis]

No... it doesn't matter, just beware of peak-charging.