AK4645 Datasheet, PDF (54/96 Pages) Asahi Kasei Microsystems – Stereo CODEC with MIC/HP-AMP

ASAHI KASEI
[AK4645]
„ Analog Mixing: Full-differentical Mono Input (L4DIF bit = “1”: IN4+/IN4− pins)
When L4DIF bit = “1”, LIN4 and RIN4 pins becomes IN4+ and IN4− pins, respectively.
When PMAINL4 bit = “1”, IN4+ and IN4− pins can be used as full-differentinal mono line input for analog mixing.
When the LINH4 and RINH4 bits are set to “1”, the input signal from the IN4+/IN4− pins is output to Headphone-Amp.
When the LINL4/RINR4 bits are set to “1”, the input signal from the IN4+/IN4− pins is output to the stereo line output
amplifier.
Table 44, Table 45 and Table 46 show the typical gain. Input signal amplitude is defined as (IN4+) − (IN4−).
AK4645
LIN4/IN4+ pin
MIC-Amp Lch
L4DIF bit ^{PMAINL4 bit}
RIN4/IN4− pin
MIC-Amp Rch
PMAINR4 bit
Lineout, HP-Amp
Figure 44. Full-differential Mono Analog Mixing Circuit
LOVL bit
IN4+/IN4− Æ LOUT/ROUT
0
−6dB
Default
1
−4dB
Table 44. IN4+/IN4− Input Æ LOUT/ROUT Output Gain (typ)
LOVL bit
IN4+/IN4− Æ LOP/LON
0
0dB
Default
1
+2dB
Table 45. IN4+/IN4− Input Æ LOP/LON Output Gain (typ)
HPG bit
IN4+/IN4− Æ HPL/HPR
0
−6dB
Default
1
−2.4dB
Table 46. IN4+/IN4− Input Æ Headphone-Amp Output Gain (typ)
MS0543-E-00
- 54 -
2006/09