AK4691 Datasheet, PDF (48/80 Pages) Asahi Kasei Microsystems – 4ch ADC + 2ch DAC with MIC/HP/SPK-AMP

[AK4691]
■ Bass Boost Function
The BST1-0 bits control the amount of low frequency boost applied to the DAC output signal (Table 38). If the BST1-0
bits are set to “01” (MIN Level), use a 47μF capacitor for AC-coupling. If the boosted signal exceeds full scale, the analog
output clips to the full scale. Figure 30 shows the boost frequency response at –20dB signal input.
Boost Filter (fs=48kHz)
20
MAX
15
MID
10
MIN
5
0
-5
10
100
1000
Frequency [Hz]
Figure 30. Bass Boost Frequency Response (fs = 48kHz)
BST1 bit
0
0
1
1
BST0 bit
Mode
0
OFF
1
MIN
0
MID
1
MAX
Table 38. Bass Boost Control
(default)
10000
MS0672-E-00
- 48 -
2007/11