Figure 27. De-Emphasis Curve; Figure 28. Passive Analog Output Filter - Cirrus Logic CDB4244 Manual

De-emphasis is only available in Single-speed Mode.
4.6.4 Analog Outputs
The recommended differential passive output filter is shown below. The filter has a flat frequency re-
sponse in the audio band while rejecting as much signal energy outside of the audio band as possible.
The filter has a single-pole high-pass filter to AC-couple the output signal to the load and a single-pole
low-pass filter to attenuate high-frequency energy resulting from the CS4244 DAC's noise shaping func-
tion.
DS900PP2
Gain
dB
T1=50 µs
0dB
-10dB
F1
3.183 kHz

Figure 27. De-emphasis Curve

DAC1-4
22 µF
AOUTx+
22 µF
AOUTx-

Figure 28. Passive Analog Output Filter

T2 = 15 µs
F2 Frequency
10.61 kHz
470 
1500 pF
47 k 
C0G
470 
1500 pF
47 k 
C0G
CS4244
38