ak4390 ETC-unknow, ak4390 Datasheet - Page 17

• Manufacturer Part Number: ak4390
• Description: Ultra Low Latency 32-bit ?? Dac
• Manufacturer: ETC-unknow

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A digital de-emphasis filter is available for 32kHz, 44.1kHz or 48kHz sampling rates (tc = 50/15µs) and it is enabled or
disabled with the DEM1-0 pins or DEM1-0 bits. For 256fs/384fs and 128fs/192fs, the digital de-emphasis filter is always
off. When in DSD mode, the DEM1-0 bits are ignored. The current value is held even if PCM mode and DSD mode are
switched.
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The AK4390 includes channel independent digital output volume control (ATT) with 256 levels at 0.5dB steps including
MUTE. The volume control is in front of the DAC, and it can attenuate the input data from 0dB to –127dB and mute.
When changing output levels, transitions are executed via soft changes; thus no switching noise occurs during these
transitions.
MS1046-E-00
De-emphasis Filter
Output Volume Control
DEM1
0
0
1
1
Table 5. De-emphasis Control
DEM0
0
1
0
1
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44.1kHz
48kHz
32kHz
Mode
OFF
(default)
[AK4390]
2009/01