[AK4480]
LRCK
fs
MCLK (MHz)
384fs
BICK
64fs
128fs
N/A
N/A
N/A
11.2896
12.2880
192fs
N/A
N/A
N/A
16.9344
18.4320
256fs
8.1920
11.2896
12.2880
22.5792
24.5760
512fs
16.3840
22.5792
24.5760
N/A
768fs
24.5760
33.8688
36.8640
N/A
1152fs
36.8640
N/A
N/A
N/A
32.0kHz
44.1kHz
48.0kHz
88.2kHz
96.0kHz
12.2880
16.9344
18.4320
33.8688
36.8640
2.0480MHz
2.8224MHz
3.0720MHz
5.6448MHz
6.1440MHz
N/A
N/A
N/A
Table 3. System Clock Example (Manual Setting Mode @Parallel Mode)(N/A: Not available)
32kHz ~ 96kHz sampling rates are supported (Table 4). However, when the sampling rate is 32kHz ~ 48kHz, DR and S/N
will degrade by approximately 3dB as compared to when MCLK= 512fs/768fs.
ACKS pin
MCLK
256fs/384fs/512fs/768fs
256fs/384fs
DR,S/N
114dB
111dB
114dB
L
H
H
512fs/768fs
Table 4. Relationship between MCLK Frequency and DR, S/N (fs = 44.1kHz)
2. Auto Setting Mode (ACKS pin = “H”)
MCLK frequency and the sampling speed are detected automatically (Table 5). MCLK with appropriate frequency should
be input externally for each speed (Table 6).
MCLK
1152fs
Sampling Speed
Normal (fs≤32kHz)
Normal
512fs/256fs
768fs/384fs
384fs
256fs
128fs
Double
Quad
192fs
Table 5. Sampling Speed (Auto Setting Mode @Parallel Mode)
LRCK
fs
MCLK (MHz)
Sampling
Speed
128fs
N/A
N/A
N/A
N/A
N/A
22.5792
24.5760
192fs
N/A
N/A
N/A
N/A
N/A
33.8688
36.8640
256fs
8.1920
11.2896
12.2880
22.5792
24.5760
N/A
384fs
12.2880
16.9344
18.4320
33.8688
36.8640
N/A
512fs
16.3840
22.5792
24.5760
N/A
N/A
N/A
N/A
768fs
24.5760
33.8688
36.8640
N/A
N/A
N/A
N/A
1152fs
36.8640
N/A
N/A
N/A
N/A
N/A
N/A
32.0kHz
44.1kHz
48.0kHz
88.2kHz
96.0kHz
176.4kHz
192.0kHz
Normal
Double
Quad
N/A
N/A
Table 6. System Clock Example (Auto Setting Mode @Parallel Mode) (N/A: Not available)
MCLK= 256fs/384fs supports sampling rate of 32kHz ~ 96kHz (Table 7). However, when the sampling rate is 32kHz ~
48kHz, DR and S/N will degrade by approximately 3dB as compared to when MCLK= 512fs/768fs.
ACKS pin
MCLK
256fs/384fs/512fs/768fs
256fs/384fs
DR,S/N
114dB
111dB
114dB
L
H
H
512fs/768fs
Table 7. Relationship between MCLK Frequency and DR, S/N (fs = 44.1kHz)
MS1146-E-03
2012/01
- 18 -
AKM [ ASAHI KASEI MICROSYSTEMS ]
