Cirrus Logic CS5381 - Manual (Page 19)

DS563F2 19
CS5381
3.9 Capacitor Size on the Reference Pin (FILT+)
The CS5381 requires an external capacitance on the internal reference voltage pin, FILT+. The size of this
decoupling capacitor will affect the low frequency distortion performance as shown in
Figure 25 , with larger
capacitor values used to optimize low frequency distortion performance. The THD+N curves in Figure 25
were measured with VA=VD=VL=5 V in Single-Speed Master Mode with a full-scale sinewave input.
Figure 25. CS5381 THD + N versus Frequency
220 uF
100 uF
47 uF
22 uF
10 uF
1 uF