AK4438 Datasheet, PDF (24/63 Pages) Asahi Kasei Microsystems – 108dB 768kHz 32bit 8-Channel Audio DAC

[AK4438]
■ De-emphasis Filter
The AK4438 has a digital de-emphasis filter (tc=50/15µs) by an IIR filter. The de-emphasis filter only
supports Normal Speed Mode. This filter corresponds to three sampling frequencies (32kHz, 44.1kHz,
48kHz). De-emphasis of each DAC can be set individually for DAC1(SDTI1), DAC2(SDTI2),
DAC3(SDTI3) and DAC4(SDTI4) by register settings.
Mode
0
1
2
3
Sampling Speed
Mode
Normal Speed Mode
Normal Speed Mode
Normal Speed Mode
Normal Speed Mode
DEM11
(DEM41-21)
0
0
1
1
DEM10
(DEM40-20)
0
1
0
1
DEM
44.1kHz
OFF
48kHz
32kHz
(default)
Table 8. De-emphasis Control
016001925-E-00
- 24 -
2016/03