AK4953A Datasheet, PDF (35/96 Pages) Asahi Kasei Microsystems – 24bit Stereo CODEC with MIC/HP/SPK-AMP

[AK4953A]
■ MIC Power
When PMMP bit = “1”, the MPWR1 or MPWR2 pin supplies power for the microphones. This output voltage is typically
2.3V and the load resistance is minimum 1kΩ. In case of using two sets of stereo microphones, the load resistance is
minimum 2kΩ for each channel. Any capacitor must not be connected directly to the MPWR1 and MPWR2 pins (Figure
25).
PMMP bit
0
1
MPSEL bit
Output
x
Hi-Z
0
MPWR1 pin
1
MPWR2 pin
Table 23. MIC Power
(default)
MIC Power
“MPSEL”
MPWR1 pin
MPWR2 pin
LIN1 pin
RIN1 pin
LIN2 pin
RIN2 pin
Figure 25. MIC Block Circuit
Mic roph one
Mic roph one
Mi crop hone
Mic roph one
MS1252-E-00
- 35 -
2010/10