AK4691 Datasheet, PDF (31/80 Pages) Asahi Kasei Microsystems – 4ch ADC + 2ch DAC with MIC/HP/SPK-AMP

[AK4691]
2. Power Supply for MIC
The Power Supply for microphone device is supplied from the MPWR pin. The MPWR pin can supply the current up to
4mA. When the output current is 0mA, the output voltage is typically (MVDD – 1.1) V at MVDD=3.0V and typically
(MVDD – 1.4) V at MVDD=4.5V. When the output current is 4mA, the output voltage is typically (MVDD – 1.3) V at
MVDD=3.0V and typically (MVDD – 1.5) V at MVDD=4.5V. When PMMP bit is “0”, the output current is not
supplied.
PMMP bit
0
1
MPWR pin
Pull-down to VSS1 with 5.3kΩ(typ.)
Output
Table 16. MIC Power
(default)
MIC Power
MPWR pin
INTL1 pin
Microphone
INTR1 pin
Microphone
INTL2 pin
INTR2 pin
Figure 22. MIC Block Circuit example
Microphone
Microphone
MS0672-E-00
- 31 -
2007/11