AK4637EN Datasheet, PDF (40/96 Pages) Asahi Kasei Microsystems – 24bit Mono CODEC with MIC/SPK-AMP

[AK4637]
■ Microphone Power
When PMMP bit = “1”, the MPWR pin supplies the power for microphones. This output voltage is typically
2.4V @MICL bit =“0”, and typically 2.0V@MICL bit = “1”. The load resistance is minimum 2.0k. Any
capacitor must not be connected directly to the MPWR pin (Figure 35).
MICL bit Output Voltage (typ)
0
2.4V
(default)
1
2.0V
Table 23. Microphone Power
MPWR pin
MIC-Power
AK4637
 2k
AIN pin
MIC-Amp
A/D HPF
Audio
I/F
BICK pin
FCK pin
STDO pin
Figure 35. MIC Block Circuit (MDIF bit = “0”)
015010680-E-00
- 40 -
2015/09