CS42448-CQZR Cirrus Logic Inc, CS42448-CQZR Datasheet - Page 56

• Manufacturer Part Number: CS42448-CQZR
• Description: IC,Soundcard Circuits,CMOS,QFP,64PIN,PLASTIC
• Manufacturer: Cirrus Logic Inc

56
7.2
DAC Output Filter
The CS42448 is a linear phase design and does not include phase or amplitude compensation for an exter-
nal filter. Therefore, the DAC system phase and amplitude response will be dependent on the external an-
alog circuitry. Shown below is the recommended active and passive output filters.
DAC1-4
AOUTx -
AOUTx +
DAC1-4
AOUTx+
Figure 31. Passive Analog Output Filter
Figure 30. Active Analog Output Filter
1.65 kΩ
5.49 kΩ
5600 pF
1800 pF
C0G
C0G
3.3 µF
+
2.94 kΩ
1.87 kΩ
10 kΩ
887 Ω
4.75 kΩ
22 μF
+
-
560 Ω
1200 pF
390 pF
C0G
C0G
C =
C
22 μF
47.5 k Ω
562Ω
4 πF
R
ext
S
+ 560
R
R ext
ext
560
CS42448
DS648F2