AK4490EQ Datasheet, PDF (30/68 Pages) Asahi Kasei Microsystems – Premium 32-Bit 2ch DAC

[AK4490]
LRCK
fs
32.0kHz
44.1kHz
48.0kHz
88.2kHz
96.0kHz
176.4kHz
192.0kHz
384kHz
768kHz
32fs
N/A
N/A
N/A
N/A
N/A
N/A
N/A
12.288
24.576
MCLK (MHz)
48fs 64fs 96fs 128fs 192fs 256fs 384fs 512fs 768fs
N/A
N/A
N/A
N/A
N/A 8.1920 12.2880 16.3840 24.5760
N/A N/A N/A N/A N/A 11.2896 16.9344 22.5792 33.8688
N/A N/A N/A N/A N/A 12.2880 18.4320 24.5760 36.8640
N/A N/A N/A N/A N/A 22.5792 33.8688 N/A
N/A
N/A N/A N/A N/A N/A 24.5760 36.8640 N/A
N/A
N/A N/A N/A 22.5792 33.8688 45.1584 N/A
N/A
N/A
N/A N/A N/A 24.5760 36.8640 49.152 N/A
N/A
N/A
18.432 24.576 36.864 49.152 N/A N/A
N/A
N/A
N/A
36.864 49.152 N/A N/A N/A N/A
N/A
N/A
N/A
Table 10. System Clock Example (Manual Setting Mode @Serial Mode)
1152fs
36.8640
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
Sampling
Speed
Normal
Double
Quad
Quad
Oct
Hex
2. Auto Setting Mode (ACKS bit = “1”)
MCLK frequency and the sampling speed are detected automatically (Table 11) and DFS1-0 bits are ignored.
The MCLK frequency corresponding to each sampling speed should be provided externally (Table 12).
MCLK
Sampling Speed
1152fs
Normal (fs32kHz)
512/256fs 768/384fs
Normal
256fs
384fs
Double
128fs
192fs
Quad
Table 11. Sampling Speed (Auto Setting Mode @Serial Mode)
LRCK
fs
32.0kHz
44.1kHz
48.0kHz
88.2kHz
96.0kHz
176.4kHz
192.0kHz
384kHz
768kHz
32fs
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
24.576
MCLK(MHz)
48fs 64fs 96fs 128fs 192fs 256fs 384fs 512fs 768fs
N/A N/A N/A N/A N/A 8.192 12.288 16.384 24.576
N/A N/A N/A N/A N/A 11.2896 16.9344 22.5792 33.8688
N/A N/A N/A N/A N/A 12.288 18.432 24.576 36.864
N/A N/A N/A N/A
N/A 22.5792 33.8688 N/A
N/A
N/A N/A N/A N/A
N/A 24.576 36.864 N/A
N/A
N/A N/A N/A 22.5792 33.8688 N/A
N/A
N/A
N/A
N/A N/A N/A 24.576 36.864 N/A
N/A
N/A
N/A
N/A 24.576 36.864 N/A
N/A
N/A
N/A
N/A
N/A
36.864 N/A N/A N/A
N/A
N/A
N/A
N/A
N/A
Table 12. System Clock Example (Auto Setting Mode @Serial Mode)
1152fs
36.864
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
Sampling
Speed
Normal
Double
Quad
Quad
Oct
Hex
When MCLK= 256fs/384fs, auto setting mode supports sampling rate of 32kHz~96kHz (Table 13). However,
the DR and S/N performances will degrade approximately 3dB as compared to when MCLK= 512fs/768fs
when the sampling rate is 32kHz~48kHz.
ACKS bit
MCLK
DR,S/N
0
256fs/384fs/512fs/768fs
120dB
1
256fs/384fs
117dB
1
512fs/768fs
120dB
Table 13. Relationship of MCLK Frequency and DR, S/N Performance (fs = 44.1kHz)
MS1648-E-03
- 30 -
2014/11