AK4529 Datasheet, PDF (16/38 Pages) Asahi Kasei Microsystems – High Performance Multi-channel Audio CODEC

ASAHI KASEI
[AK4529]
LRCK
fs
32.0kHz
44.1kHz
48.0kHz
88.2kHz
96.0kHz
MCLK (MHz)
256fs
512fs
-
16.3840
-
22.5792
-
24.5760
22.5792
-
24.5760
-
Sampling
Speed
Normal
Double
Table 5. System Clock Example (Auto Setting Mode)
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”).
Mode
0
1
2
3
4
5
6
7
Sampling Speed
Normal Speed
Normal Speed
Normal Speed
Normal Speed
Double Speed
Double Speed
Double Speed
Double Speed
DEM1
0
0
1
1
0
0
1
1
DEM0
0
1
0
1
0
1
0
1
DEM
44.1kHz
OFF
48kHz
32kHz
OFF
OFF
OFF
OFF
Default
Table 6. De-emphasis control
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
- 16 -
2001/3