ak4529 AKM Semiconductor, Inc., ak4529 Datasheet - Page 16

• Manufacturer Part Number: ak4529
• Description: High Performance Multi-channel Audio Codec
• Manufacturer: AKM Semiconductor, Inc.

ASAHI KASEI
n De-emphasis Filter
The AK4529 includes the digital de-emphasis filter (tc=50/15µs) by IIR filter. This filter corresponds to three sampling
frequencies (32kHz, 44.1kHz, 48kHz). De-emphasis of each DAC can be set individually by register data of DEMA1-C0
(DAC1: DEMA1-0, DAC2: DEMB1-0, DAC3: DEMC1-0, see “Register Definitions”).
n Digital High Pass Filter
The ADC has a digital high pass filter for DC offset cancel. The cut-off frequency of the HPF is 0.9Hz at fs=44.1kHz and
also scales with sampling rate (fs).
MS0082-E-00
Mode
0
1
2
3
4
5
6
7
32.0kHz
44.1kHz
48.0kHz
88.2kHz
96.0kHz
LRCK
Sampling Speed
Table 5. System Clock Example (Auto Setting Mode)
Normal Speed
Normal Speed
Normal Speed
Normal Speed
Double Speed
Double Speed
Double Speed
Double Speed
fs
Table 6. De-emphasis control
22.5792
24.5760
256fs
-
-
-
MCLK (MHz)
DEM1
- 16 -
0
0
1
1
0
0
1
1
16.3840
22.5792
24.5760
512fs
-
-
DEM0
0
1
0
1
0
1
0
1
Sampling
Normal
Double
Speed
44.1kHz
48kHz
32kHz
DEM
OFF
OFF
OFF
OFF
OFF
Default
[AK4529]
2001/3