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AK4645EN Datasheet, PDF (39/96 Pages) Asahi Kasei Microsystems – Stereo CODEC with MIC/HP-AMP | |||
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ASAHI KASEI
[AK4645]
 ÏΠΫ༻ήΠϯÎϯÏ
AK4645͸ÏΠΫ༻ήΠϯÎϯÏÎ಺à¬Í ͯÍÎ͢ɻMGAIN1-0 bitÍ´ÎÎήΠϯÎàªà°Í¢ÎÍͱÍÍ°ÍÎÍ¢
(Table 23)É»à³à¾Î ϯÏÊμϯε͸MGAIN1-0 bits = â00âͷͱÍtyp. 60kâ¦ÉºMGAIN1-0 bits = â01â, â10â, â11âÍ·
ͱÍtyp. 30kâ¦Í°Í¢É»
 ÏΠΫÏÏ«Ê
MGAIN1 bit MGAIN0 bit Input Gain
0
0
0dB
0
1
+20dB
1
0
+26dB
1
1
+32dB
Table 23. ÏΠΫà³à¾Î®Î ϯ
Default
PMMP bit = â1âͷͱÍɺMPWR pinÍÎÏΠΫ༻ͷిݯÎÍ¢Ú
ÚÎÍͱÍÍ°ÍÎ͢ɻà¥à¾à°¿Ñ¹Í¸(0.75 x
AVDD)V (typ)Ͱɺà·Õà°ß
͸ɺmin. 0.5kâ¦Í°Í¢É»ÎµÏϨΦÏΠΫ2ܥ౷ͷà§ß¹Í¸Ö¤Î½ÏÏϧ min. 2kâ¦Í°Í¢É»
MPWR pinʹίϯÏϯα͸àªà¬Í ͳÍÍ°Ô¼ÍÍÉ»(Figure 34à¢à¦°)
PMMP bit
MPWR pin
0
Hi-Z
1
Output
Table 24. ÏΠΫÏÏ«Ê
Default
MIC Power
MPWR pin
LIN1 pin
RIN1 pin
LIN2 pin
RIN2 pin
Figure 34. MIC Block Circuit
Microphone
Microphone
Microphone
Microphone
MS0543-J-00
- 39 -
2006/09
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