Figure 27.De-Emphasis Curve; Figure 28.Passive Analog Output Filter - Cirrus Logic CS4244 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.
DS900F2
Gain
dB
T1=50 µs
0dB
-10dB
F1
3.183 kHz
Figure 27. De-emphasis Curve
DAC1-4
AOUTx+
AOUTx-
Figure 28. Passive Analog Output Filter
T2 = 15 µs
F2 Frequency
10.61 kHz
22 µF
470 
47 k  1500 pF
C0G
22 µF
470 
47 k  1500 pF
C0G
CS4244
38