CS42448 Datasheet, PDF (59/70 Pages) Cirrus Logic – 108 dB, 192 kHz 6-in, 8-out CODEC

7.2 DAC Output Filter
The CS42448 is a linear phase design and does not include phase or amplitude compensation for an ex-
ternal filter. Therefore, the DAC system phase and amplitude response will be dependent on the external
analog circuitry. Shown below is the recommended active and passive output filters.
DAC1-4
AOUTx -
AOUTx +
1800 pF
C0G
4.75 kΩ
390 pF
5.49 kΩ 2.94 kΩ
C0G
-
1.65 kΩ
5600 pF
887 Ω
C0G
1.87 kΩ
+
1200 pF
C0G
22 µF
22 µF 562Ω
47.5 k Ω
Figure 30. Active Analog Output Filter
DAC1-4
AOUTx+
3.3 µF
560 Ω
+
10 kΩ
C
R _ext
C=
Figure 31. Passive Analog Output Filter
R_ext+ 560
4 πF_SR_ext560
DS648PP2
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