AK4626A Datasheet, PDF (17/40 Pages) Asahi Kasei Microsystems – High Performance Multi-channel Audio CODEC

ASAHI KASEI
[AK4626A]
MCLK
512fs
256fs
128fs
Sampling Speed
Normal
Double
Quad
Table 5. Sampling Speed (Auto Setting Mode)
LRCK
fs
32.0kHz
44.1kHz
48.0kHz
88.2kHz
96.0kHz
176.4kHz
192.0kHz
128fs
-
-
-
-
-
22.5792
24.5760
MCLK (MHz)
256fs
-
-
-
22.5792
24.5760
-
-
512fs
16.3840
22.5792
24.5760
-
-
-
-
Sampling
Speed
Normal
Double
Quad
Table 6. System Clock Example (Auto Setting Mode)
„ De-emphasis Filter
The AK4626A includes the digital de-emphasis filter (tc=50/15µs) by IIR filter. De-emphasis filter is not available in
Double Speed Mode and Quad Speed Mode. 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
Sampling Speed
Normal Speed
Normal Speed
Normal Speed
Normal Speed
DEM1
0
0
1
1
DEM0
0
1
0
1
DEM
44.1kHz
OFF
48kHz
32kHz
Default
Table 7. De-emphasis control
„ Digital High Pass Filter
The ADC has a digital high pass filter for DC offset cancel. The cut-off frequency of the HPF is 1.0Hz at fs=48kHz and
scales with sampling rate (fs).
MS0397-E-00
- 17 -
2005/06