cs4244-enzr Cirrus Logic, Inc., cs4244-enzr Datasheet - Page 38

• Manufacturer Part Number: cs4244-enzr
• Description: 4 In/4 Out Audio Codec With Pcm And Tdm Interfaces
• Manufacturer: Cirrus Logic, Inc.

DS900PP2
4.6.4
De-emphasis is only available in Single-speed Mode.
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.
-10dB
Gain
0dB
dB
DAC1-4
Figure 28. Passive Analog Output Filter
AOUTx+
AOUTx-
Figure 27. De-emphasis Curve
3.183 kHz
T1=50 µs
F1
22 µF
22 µF
47 k 
47 k 
470 
470 
10.61 kHz
F2
T2 = 15 µs
1500 pF
1500 pF
C0G
C0G
Frequency
CS4244
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