AK4645AEZ Datasheet, PDF (32/85 Pages) Asahi Kasei Microsystems – Stereo CODEC with MIC/HP-AMP

[AK4645A]
■ ϚΠΫ༻ήΠϯΞϯϓ
AK4645A͸ϚΠΫ༻ήΠϯΞϯϓΛ಺ଂ͍ͯ͠·͢ɻMGAIN1-0 bitʹΑΓήΠϯΛઃఆ͢Δ͜ͱ͕Ͱ͖·͢
(Table 16)ɻೖྗΠϯϐʔμϯε͸MGAIN1-0 bits = “00”ͷͱ͖typ. 60kΩɺMGAIN1-0 bits = “01”, “10”, “11”ͷ
ͱ͖typ. 30kΩͰ͢ɻ
MGAIN1 bit
0
0
1
1
MGAIN0 bit Input Gain
0
0dB
1
+20dB
0
+26dB
1
+32dB
Table 16. ϚΠΫೖྗήΠϯ
(default)
■ ϚΠΫύϫʔ
PMMP bit = “1”ͷͱ͖ɺMPWR pin͔ΒϚΠΫ༻ͷిݯΛ͢څڙΔ͜ͱ͕Ͱ͖·͢ɻग़ྗిѹ͸(0.75 x
AVDD)V (typ)Ͱɺෛՙ఍߅͸ɺmin. 0.5kΩͰ͢ɻεςϨΦϚΠΫ2ܥ౷ͷ৔߹͸֤νϟωϧ min. 2kΩͰ͢ɻ
MPWR pinʹίϯσϯα͸઀ଓ͠ͳ͍ͰԼ͍͞ɻ(Figure 27)
PMMP bit
MPWR pin
0
Hi-Z
1
Output
Table 17. ϚΠΫύϫʔ
(default)
MIC Power
MPWR pin
LIN1 pin
RIN1 pin
LIN2 pin
RIN2 pin
Figure 27. MIC Block Circuit
Microphone
Microphone
Microphone
Microphone
MS0986-J-00
- 32 -
2008/07