Cirrus-logic CS5341 Manuel d'utilisateur télécharger pdf (Page 19)

DS564F2 19

CS5341

Confidential Draft

3/11/08

4.8 Capacitor Size on the Reference Pin (FILT+)

The CS5341 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 22, with larger

capacitor values used to optimize low frequency distortion performance. This plot was taken using the

CDB5341 evaluation platform, with the device running in Single-Speed Mode and VA=VD=VL=5 V.

Figure 22. CS5341 THD+N versus Frequency

47 uF

100 uF

22 uF

10 uF

6.8 uF

4.7 uF

3.3 uF

2.2 uF

1 uF

5.6 uF

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Cirrus-logic CS5341 Manuel d'utilisateur Page 19