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AK7757VQ Datasheet, PDF (9/24 Pages) Asahi Kasei Microsystems – 24bit 3ch ADC +4ch DAC + Mic Amp 内蔵 Audio DSP | |||
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[AK7757]
ã¢ããã°ç¹æ§ (CODEC)
â ADCç¹æ§
1. Microphone Amplifier
(Ta= 25â; AVDD=DVDD=3.3V; DVDD18=1.8V; AVSS=DVSS=0V)
Parameter
min
typ
å
¥åã¤ã³ãã¼ãã³ã¹
22.5
30
MGAIN[2:0]bits=0h
0
MGAIN[2:0]bits=1h
15
MIC
MGAIN[2:0]bits=2h
18
AMP ã²ã¤ã³
MGAIN[2:0]bits=3h
21
MGAIN[2:0]bits=4h
24
MGAIN[2:0]bits=5h
27
MGAIN[2:0]bits=6h
30
MGAIN[2:0]bits=7h
33
max
Unit
kΩ
dB
dB
dB
dB
dB
dB
dB
dB
2. Microphone Bias
(Ta= 25â; AVDD=DVDD=3.3V; DVDD18=1.8V; AVSS=DVSS=0V)
Parameter
min
typ
max
Unit
MIC åºåé»å§ è² è·é»æµ0mA
BIAS
è² è·é»æµ1mA
2.46
V
2.32
è² è·æµæ
2
kΩ
è² è·å®¹é
30
pF
Note 10. åºåé»å§ã¯ AVDD ã«ä¾åãã¾ãã
3. ADC1
(ç¹è¨ãªãå ´åã¯ãTa=25ºC; AVDD=DVDD=3.3V, DVDD18=1.8V, VSS=0V, BICK=64fs; Signal frequency 1kHz;
Measurement frequency = 20Hz~20kHz @fs=48kHz; å·®åå
¥åæ)
Parameter
min
typ
max
Unit
ADC Resolution
Section Dynamic Characteristics
24
Bits
S/(N+D) (-1dBFS)
MGAIN[2:0]=0h(0dB)
78
88
dB
MGAIN[2:0]=3h(+21dB)
70
80
Dynamic Range
MGAIN[2:0]=0h(0dB)
86
96
dB
(A-weighted) (Note 11) MGAIN[2:0]=3h(+21dB)
76
86
S/N (A-weighted)
MGAIN[2:0]=0h(0dB)
86
96
dB
MGAIN[2:0]=3h(+21dB)
76
86
Inter-Channel Isolation (fin=1kHz) (Note 12)
90
110
dB
DC accuracy
Channel Gain Mismatch
0.0
0.3
dB
Analog Input
Input Voltage (Differential)
±2.00
±2.20
±2.40
Vp-p
Input Voltage (Single-ended)
2.00
2.20
2.40
Vp-p
Input Impedance
22.5
30
kâ¦
Note 11. -60dB FS ã®ä¿¡å·ãå
¥åããã¨ãã® S/(N+D)ã§ãã
Note 12. -1dB FS ã®ä¿¡å·ãå
¥åããå ´åã® AINRãAINL éã®ã¢ã¤ã½ã¬ã¼ã·ã§ã³ã§ãã
MS1489-J-01-PB
9
2013/05
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