AK4452VN Datasheet, PDF (47/91 Pages) Asahi Kasei Microsystems – 115dB 768kHz 32-bit 2ch Premium DAC

[AK4452]
■ Digital Filter (PCM mode)
Four digital filters are available for playback, providing a choice of different sound colors. These digital filters
are selected by SD bit, SLOW bit and SSLOW bit.
SSLOW
0
0
0
0
1
SD bit SLOW bit
Mode
0
0
Sharp roll-off filter
0
1
Slow roll-off filter
1
0
Short delay Sharp roll-off filter
1
1
Short delay Slow roll-off filter
*
*
Super Slow Roll-off Mode
Table 16. Digital Filter Setting (*: don’t care)
(default)
When SSLOW bit = “1”, the internal digital filters are powered down and the audio data passes the digital filter
block.
■ De-emphasis Filter (PCM mode)
A digital de-emphasis filter is available for 32kHz, 44.1kHz or 48kHz sampling rates (tc = 50/15µs) and is
enabled or disabled with DEM11-10 bits (DEM bits).
DEM11-10 bits control de-emphasis mode of DAC, respectively. DEM bits settings are invalid in DSD mode.
The register settings are maintained when switching the mode between PCM and DSD modes.
DEM11 DEM10 Mode
0
0
44.1kHz
0
1
OFF (default)
1
0
48kHz
1
1
32kHz
Table 17. DAC De-emphasis Control
Rev. 0.1
- 47 -
2014/04