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