Noisy Capacitors. If you design audio devices, or if you simply prefer quiet PCBs, you have another reason to choose C0G over X7R or X5R: Class 2 caps exhibit piezoelectric behavior that can cause them to function as both microphones (that will convert sound into electrical noise) and buzzers (that...
- C0G capacitors have many of the advantages of film capacitors plus very low temperature drift (limited to 30 ppm/C over 25-85C), including very low aging, voltage coefficient, frequency coefficient, leakage, and dissipation factor. C0G capacitors are used into the GHz range.