AK5701 Datasheet, PDF (34/62 Pages) Asahi Kasei Microsystems – PLL & MIC-AMP 16-Bit Stereo ADC

ASAHI KASEI
[AK5701]
MPWR pin
1k
IN1− pin
IN1+ pin
1k
AK5701
MIC-Amp
Figure 37. ࠩಈϚΠΫೖྗͷճ࿏ྫ(MDIF1/2 bits = “1”)
„ ϚΠΫ༻ήΠϯΞϯϓ
AK5701͸ϚΠΫ༻ήΠϯΞϯϓΛ಺ଂ͍ͯ͠·͢ɻMGAIN1-0 bitʹΑΓήΠϯΛઃఆ͢Δ͜ͱ͕Ͱ͖·͢
(Table 20)ɻೖྗΠϯϐʔμϯε͸MGAIN1-0 bits = “00”ͷͱ͖typ. 60kΩɺMGAIN1-0 bits = “01”, “10”ͷͱ͖typ.
30kΩͰ͢ɻ
„ ϚΠΫύϫʔ
MGAIN1 bit MGAIN0 bit Input Gain
0
0
0dB
0
1
+15dB
1
0
+30dB
1
1
N/A
Table 20. ϚΠΫೖྗήΠϯ
Default
PMMP bit = “1”ͷͱ͖ɺMPWR pin͔ΒϚΠΫ༻ͷిݯΛ͢څڙΔ͜ͱ͕Ͱ͖·͢ɻग़ྗిѹ͸(0.75 x
AVDD)V (typ)ʹൺྫ͠ɺෛՙ఍߅͸ɺmin. 0.5kΩͰ͢ɻεςϨΦϚΠΫ2ܥ౷ͷ৔߹͸֤νϟωϧ min. 2kΩ
Ͱ͢ɻMPWR pinʹίϯσϯα͸઀ଓ͠ͳ͍ͰԼ͍͞ɻ(Figure 38ࢀর)
PMMP bit
MPWR pin
0
Hi-Z
1
Output
Table 21. ϚΠΫύϫʔ
Default
MIC Power
MPWR pin
MS0404-J-00
LIN1 pin
RIN1 pin
LIN2 pin
RIN2 pin
Figure 38. MIC Block Circuit
Microphone
Microphone
Microphone
Microphone
- 34 -
2005/08