CS4271 Datasheet, PDF (33/53 Pages) Cirrus Logic – 24-Bit, 192 kHz Stereo Audio CODEC

CS4271
5.4.2 Output Connections
The recommended output filter configuration is shown in Figure 14. This filter configuration accounts for the normally
differing AC loads on the AOUT+ and AOUT- differential output pins. It also shows an AC coupling configuration
which minimizes the number of required AC coupling capacitors.
The CS4271 does not include phase or amplitude compensation for an external filter, and therefore the DAC system
phase and amplitude response will be dependent on the external analog circuitry. Figure 15 shows the full-scale an-
alog output levels.
CS4271
AOUT-
AOUT+
2200 pF
C0G
4.99 kΩ
470 pF
4.42 kΩ 2.32 kΩ
C0G
-
1.33 kΩ 715 Ω
+
1.5 nF
6.8 nF
C0G
1.50 kΩ
C0G
22 µF
22 µF _{560 Ω}
47 kΩ
Figure 14. CS4271 Recommended Analog Output Filter
Analog
Out
CS4271
AOUT+
AOUT-
3.75 V
2.5 V
1.25 V
3.75 V
2.5 V
1.25 V
Full-Scale Output Level= (AIN+) - (AIN-)= 5 Vpp
Figure 15. Full-Scale Analog Output
DS592F1
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