AK4646EN AKM [Asahi Kasei Microsystems], AK4646EN Datasheet - Page 30

• Manufacturer Part Number: AK4646EN
• Description: Stereo CODEC with MIC/SPK-AMP
• Manufacturer: AKM [Asahi Kasei Microsystems]

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The AK4646 has an input selector. When MDIF1 and MDIF2 bits are “0”, INL and INR bits select LIN1/LIN2 and
RIN1/RIN2, respectively. When MDIF1 and MDIF2 bits are “1”, LIN1, RIN1, LIN2 and RIN2 pins become IN1−, IN1+,
IN2+ and IN2− pins respectively. In this case, full-differential input is available (Figure 22).
MS0557-E-02
Note 32. Any signal should be input to RIN1 pin, when MDIF1 bit = “0”, MDIF2 bit = “1” and INL bit = “0”.
Note 33. Any signal should be input to LIN2 pin, when MDIF1 bit = “1”, MDIF2 bit = “0” and INL bit = “1”.
MIC/LINE Input Selector
MDIF1 bit
0
1
Figure 22. Connection Example for Full-differential Mic Input (MDIF1/2 bits = “1”)
LIN1/IN1− pin
RIN1/IN1+ pin
RIN2/IN2− pin
LIN2/IN2+ pin
MDIF2 bit
0
1
0
1
R1
R2
AK4646
INL bit
Figure 21. Mic/Line Input Selector
Table 18. MIC/Line in Path Select
1k
0
1
0
1
x
x
1k
MPWR pin
INx+ pin
INx− pin
MDIF1 bit
MDIF2 bit
INR bit
INL bit
- 30 -
INR bit
x
0
1
0
1
x
0
1
x
MIC-Amp
LIN1(Note 32)
IN1+/−
IN1+/−
AK4646
LIN1
LIN1
LIN2
LIN2
N/A
N/A
Lch
ADC Lch
ADC Rch
RIN2(Note
IN2+/−
IN2+/−
RIN1
RIN2
RIN1
RIN2
N/A
N/A
Rch
33)
(default)
[AK4646]
2007/05