AK4671_10 Datasheet, PDF (59/166 Pages) Asahi Kasei Microsystems – Stereo CODEC with MIC/RCV/HP-AMP

[AK4671]
■ MIC Power
When PMMP bit = “1”, the MPWR pin supplies power for the microphone. This output voltage is typically 0.8 x AVDD
and the load resistance is minimum 0.5kΩ. In case of using two sets of stereo mic, the load resistance is minimum 2kΩ for
each channel. Any capacitor must not be connected directly to the MPWR pin (Figure 55).
PMMP bit
MPWR pin
0
Hi-Z
1
Output
Table 20. MIC Power
(default)
MIC Power
MPWR pin
LIN1 pin
RIN1 pin
LIN2 pin
RIN2 pin
Figure 55. MIC Block Circuit
Microphone
Microphone
Microphone
Microphone
MS0666-E-02
- 59 -
2010/06