3 capacitor selection – Cirrus Logic CS42528 User Manual
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DS586F2
CS42528
10.1.3 Capacitor Selection
The type of capacitors used for the PLL filter can have a significant effect on receiver performance. Large
or exotic film capacitors are not necessary because their leads, and the required longer circuit board trac-
es, add undesirable inductance to the circuit. Surface-mount ceramic capacitors are a good choice be-
cause their own inductance is low, and they can be mounted close to the LPFLT pin to minimize trace
inductance. For CRIP, a C0G or NPO dielectric is recommended; and for CFILT, an X7R dielectric is pre-
ferred. Avoid capacitors with large temperature co-coefficient, or capacitors with high dielectric constants,
that are sensitive to shock and vibration. These include the Z5U and Y5V dielectrics.