AK4648 Datasheet, PDF (62/119 Pages) Asahi Kasei Microsystems – Stereo CODEC with MIC/HP/SPK-AMP

[AK4648]
SPKG2-0
bits
LIN2/RIN2/LIN3/RIN3/LIN4/RIN4 Æ SPLP/SPLN or SPRP/SPRN
ALC bit = “0”
ALC bit = “1”
SPKMN bit = “1” SPKMN bit = “0” SPKMN bit = “1” SPKMN bit = “0”
000
−1.59dB
+4.41dB
+0.41dB
+6.41dB
(default)
001
+0.41dB
+6.41dB
+2.41dB
+8.41dB
010
+4.63dB
+10.63dB
+6.63dB
+12.63dB
011
+6.63dB
+12.63dB
+8.63dB
+14.63dB
100
-6dB
0dB
-4dB
+2dB
101
-12dB
-6dB
-10dB
-4dB
110
N/A
N/A
N/A
N/A
111
N/A
N/A
N/A
N/A
Table 45. LIN2/RIN2/LIN3/RIN3/LIN4/RIN4 Input Æ Speaker-Amp Output Gain (typ.), N/A: Not available
■ Analog Mixing: Full-differential Mono Input (L4DIF bit = “1”: IN4+/IN4− pins)
When L4DIF bit = “1”, LIN4 and RIN4 pins become 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 LINS4 and RINS4 bits are set to “1”, the input signal from the IN4+/IN4− pins is output to Speaker-Amp. 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 46, Table 47, Table 48, and Table 49 show the typical gain. Input signal amplitude is defined as (IN4+) − (IN4−).
AK4648
LIN4/IN4+ pin
MIC-Amp Lch
L4DIF bit ^{PMAINL4 bit}
RIN4/IN4− pin
MIC-Amp Rch
PMAINR4 bit
Lineout, HP-Amp, Speaker-Amp
Figure 42. Full-differential Mono Analog Mixing Circuit
LOVL bit
IN4+/IN4− Æ LOUT/ROUT
0
−6dB
(default)
1
−4dB
Table 46. IN4+/IN4− Input Æ LOUT/ROUT Output Gain (typ.)
LOVL bit
IN4+/IN4− Æ LOP/LON
0
0dB
(default)
1
+2dB
Table 47. IN4+/IN4− Input Æ LOP/LON Output Gain (typ.)
MS0625-E-01
- 62 -
2007/06