AK4673 Datasheet, PDF (57/107 Pages) Asahi Kasei Microsystems – Stereo CODEC with MIC/HP-AMP and Touch Screen Controller

[AK4673]
■ Analog Mixing: Full-differential 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-differential 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−).
AK4673
LIN4/IN4+ pin
MIC-Amp Lch
L4DIF bit ^{PMAINL4 bit}
RIN4/IN4− pin
MIC-Amp Rch
PMAINR4 bit
Lineout, HP-Amp
Figure 43. 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)
MS0670-E-00
- 57 -
2007/09