ak4648 AKM Semiconductor, Inc., ak4648 Datasheet - Page 62

• Manufacturer Part Number: ak4648
• Description: Stereo Codec With Mic/hp/spk-amp
• Manufacturer: AKM Semiconductor, Inc.

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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 − ).
MS0625-E-01
Analog Mixing: Full-differential Mono Input (L4DIF bit = “1”: IN4+/IN4 − pins)
Table 45. LIN2/RIN2/LIN3/RIN3/LIN4/RIN4 Input
SPKG2-0
000
001
010
011
100
101
110
111
bits
SPKMN bit = “1”
− 1.59dB
+0.41dB
+4.63dB
+6.63dB
LOVL bit
LOVL bit
LIN4/IN4+ pin
RIN4/IN4− pin
-12dB
-6dB
LIN2/RIN2/LIN3/RIN3/LIN4/RIN4
N/A
N/A
Table 46. IN4+/IN4 − Input
Table 47. IN4+/IN4 − Input
0
1
0
1
Figure 42. Full-differential Mono Analog Mixing Circuit
ALC bit = “0”
AK4648
SPKMN bit = “0” SPKMN bit = “1”
+10.63dB
+12.63dB
+4.41dB
+6.41dB
IN4+/IN4 −
-6dB
0dB
N/A
N/A
L4DIF bit
IN4+/IN4 −
PMAINL4 bit
PMAINR4 bit
- 62 -
Lineout, HP-Amp, Speaker-Amp
LOUT/ROUT Output Gain (typ.)
− 6dB
− 4dB
+2dB
0dB
LOP/LON Output Gain (typ.)
Speaker-Amp Output Gain (typ.), N/A: Not available
LOUT/ROUT
LOP/LON
+0.41dB
+2.41dB
+6.63dB
+8.63dB
SPLP/SPLN or SPRP/SPRN
-10dB
-4dB
N/A
N/A
ALC bit = “1”
MIC-Amp Lch
MIC-Amp Rch
SPKMN bit = “0”
(default)
(default)
+12.63dB
+14.63dB
+6.41dB
+8.41dB
+2dB
-4dB
N/A
N/A
(default)
[AK4648]
2007/06