AK4665A Datasheet, PDF (31/52 Pages) Asahi Kasei Microsystems – 20-Bit Stereo CODEC with MIC/HP-AMP

ASAHI KASEI
[AK4665A]
„ Output Analog Volume (LOUT, ROUT pins)
When the LMUTE bit is “0”, ATTS3-0 bits (0dB ∼ −30dB, 2dB step, Table 30) control the LOUT/ROUT output level.
Some pop noise occurs at the changing of output volume of LOUT/ROUT.
LMUTE
ATTS3-0
Attenuation
FH
0dB
EH
−2dB
DH
−4dB
0
CH
−6dB
:
:
:
:
1H
−28dB
0H
−30dB
1
x
MUTE
Default
Table 30. LOUT/ROUT Volume ATT (x: Don’t care)
„ Stereo Line Output (LOUT, ROUT pins)
The common voltage is VCOM, and the load resistance is min. 10kΩ. Stereo Lineout is powered-up when PMLO bit is
“1”. The ON/OFF of each path is set by DACL, LINL, MINL, DACR, RINR and MINR bits. When ALC2 bit is “0” and
ATTS3-0 bits is “FH”(0dB), the summation gain of each path is 0dB (typ).
LIN/RIN pin
MIN pin
LINL/RINR bit
MINL/MINR bit
ALC2
OPGA
LOUT/ ROUT pin
DACL/DACR
DACL/DACR bit
Figure 19. LOUT/ROUT Summation Circuit
(L+R)/2 signal of DAC is output from LOUT and ROUT pins when LOM bit is “1”.
DACL
0
1
LOM bit
LOUT pin
x
Path OFF
0
L
1
(L+R)/2
Table 31. Line Output Mode (Lch)
Default
DACR
0
1
LOM bit
ROUT pin
x
Path OFF
0
R
1
(L+R)/2
Table 32. Line Output Mode (Rch)
Default
MS0440-E-01
- 31 -
2006/05