AK4490EN Datasheet, PDF (31/68 Pages) Asahi Kasei Microsystems – Premium 32-Bit 2ch DAC

[AK4490EN]
When MCLK= 256fs/384fs, auto setting mode supports sampling rate of 32kHz~96kHz. 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 (Table 12).
Table 12. Relationship of MCLK Frequency and DR, S/N Performance (fs = 44.1kHz)
ACKS bit
MCLK
DR,S/N
0
256fs/384fs/512fs/768fs
120dB
1
256fs/384fs
117dB
1
512fs/768fs
120dB
3. Digital filter
The AK4490EN has four kinds of digital filter selected by SSLOW, SD and SLOW bits. Different sound
qualities on playback can be selected by these filters.
SSLOW bit
0
0
0
0
1
SD bit
0
0
1
1
-
Table 13. Digital Filter Setting
SLOW bit
Mode
0
Sharp roll-off filter
1
Slow roll-off filter
0
Short delay Sharp roll-off filter
1
Short delay Slow roll-off filter
-
Super Slow roll-off filter
(default)
The AK4490EN can be operated on a slower sampling frequency. This mode is available when the
SSLOW bit = “1” (05H D0).
015013666-E-01
- 31 -
2015/12