ak4633 AKM Semiconductor, Inc., ak4633 Datasheet - Page 38

• Manufacturer Part Number: ak4633
• Description: 16-bit ?? Mono Codec With Alc & Mic/spk-amp
• Manufacturer: AKM Semiconductor, Inc.

ASAHI KASEI
The MPI pin supplies power for the Microphone. This output voltage scales with 0.8 x AVDD (typ) and the load
resistance is minimum 2kΩ. Don’t connect the capacitor directly to MPI pin
The MIC input becomes an differential input when MDIF bit is “1”. The input pins are MIC and MICP pins. At this time,
the MICP pin couldn’t be used for an BEEP input. When MDIF bit is “1”, the PMBP, BEEPA and BEEPS bits should be
set to “0”.
MS0447-E-03
MIC Power
MIC Differential Input
≥ 2k
1k
1k
MICN pin
MICP pin
MPI pin
MIC pin
MPI pin
Figure 31. MIC Differential Input Circuit
Figure 30. MIC Block Circuit
MIC-Power
MIC-Power
MIC-Amp
MIC-Amp
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A/D
A/D
HPF
HPF
AK4633
AK4633
Audio
Audio
I/F
I/F
STDO pin
STDO pin
BICK pin
BICK pin
FCK pin
FCK pin
[AK4633]
2006/04