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CS44L11 Datasheet(PDF) 22 Page - Cirrus Logic

Part # CS44L11
Description  Low Voltage Class-D PWM Headphone Amplifier
PDF  34 Pages
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Manufacturer  CIRRUS [Cirrus Logic]
Direct Link  http://www.cirrus.com
Logo CIRRUS - Cirrus Logic

CS44L11 Datasheet(HTML) 22 Page - Cirrus Logic

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22
DS640PP4
CS44L11
4.9.5
De-Emphasis Control (DEM)
Default = 00
00 - Disabled
01 - 44.1 kHz
10 - 48 kHz
11 - 32 kHz
Function:
Selects the appropriate digital filter to maintain the standard 15
µs/50 µs digital de-emphasis filter re-
sponse at 32, 44.1 or 48 kHz sample rates (see Figure 6).
Note:
De-emphasis is not available in Double-Speed Mode.
DBS = 1
MCLKDIV = 0
DBS = 1
MCLKDIV = 1
LRCK
(kHz)
MCLK/
LRCK
MCLK
(MHz)
MCLK/
LRCK
MCLK
(MHz)
FRQSFT1 FRQSFT0 CLKDIV1 CLKDIV0
PWM
Switching
Freq.
(kHz)
96
128
12.288
256
24.576
0
0
0
0
384
96
256
24.576
512
49.152
0
0
1
0
88.2
128
11.2896
256
22.5792
0
0
0
0
352.8
88.2
256
22.5792
512
45.1584
0
0
1
0
Table 13. Double-Speed Clock Modes - Control Port Mode
Gain
dB
-10dB
0dB
Frequency
T2 = 15 µs
T1=50 µs
F1
F2
3.183 kHz
10.61 kHz
Figure 6. De-Emphasis Curve



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