AK4646EZ Datasheet, PDF (30/78 Pages) Asahi Kasei Microsystems – Stereo CODEC with MIC/SPK-AMP

[AK4646EZ]
■ MIC/LINE Input Selector
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).
MDIF1 bit
MDIF2 bit
INL bit
INR bit
Lch
Rch
0
0
LIN1
RIN1
(default)
0
1
LIN1
RIN2
0
1
0
LIN2
RIN1
1
LIN2
RIN2
1
0
x
LIN1(Note 34)
IN2+/−
1
x
N/A
N/A
1
0
x
0
N/A
N/A
1
IN1+/−
RIN2(Note 35)
1
x
x
IN1+/−
IN2+/−
(x: Don’t care, N/A: Not available)
Note 34. Any signal should be input to RIN1 pin, when MDIF1 bit = “0”, MDIF2 bit = “1” and INL bit = “0”.
Note 35. Any signal should be input to LIN2 pin, when MDIF1 bit = “1”, MDIF2 bit = “0” and INL bit = “1”.
Table 18. MIC/Line in Path Select
AK4646
LIN1/IN1− pin
RIN1/IN1+ pin
INL bit
MDIF1 bit
ADC Lch
RIN2/IN2− pin
LIN2/IN2+ pin
INR bit
MDIF2 bit
ADC Rch
Figure 21. Mic/Line Input Selector
MPWR pin
R1
1k
INx− pin
INx+ pin
R2
1k
AK4646
MIC-Amp
Figure 22. Connection Example for Full-differential Mic Input (MDIF1/2 bits = “1”)
MS0630-E-00
- 30 -
2007/06