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AK4645AEZ Datasheet, PDF (7/85 Pages) Asahi Kasei Microsystems – Stereo CODEC with MIC/HP-AMP | |||
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[AK4645A]
ÎÏϩάà²à©
(Ta=25°C; AVDD=DVDD=TVDD=HVDD=3.3V; AVSS=HVSS=0V; fs=44.1kHz, BICK=64fs;
Signal Frequency=1kHz; 16bit Data; Measurement frequency=20Hz â¼ 20kHz; unless otherwise specified)
Parameter
min
typ
max
Units
MIC Amplifier: LIN1/RIN1/LIN2/RIN2/LIN4/RIN4 pins & LIN3/RIN3 pins (AIN3 bit = â1â);
MDIF1=MDIF2 bits = â0â (Single-ended inputs)
Input
MGAIN1-0 bits = â00â
40
60
80
kΩ
Resistance MGAIN1-0 bits = â01â, â10âor â11â
20
30
40
kΩ
MGAIN1-0 bits = â00â
-
0
-
dB
Gain
MGAIN1-0 bits = â01â
MGAIN1-0 bits = â10â
-
+20
-
dB
-
+26
-
dB
MGAIN1-0 bits = â11â
-
+32
-
dB
MIC Amplifier: IN1+/IN1â/IN2+/IN2â pins; MDIF1 = MDIF2 bits = â1â (Full-differential input)
Input Voltage (Note 8)
MGAIN1-0 bits = â01â
-
-
0.228
Vpp
MGAIN1-0 bits = â10â
MGAIN1-0 bits = â11â
-
-
0.114
Vpp
-
-
0.057
Vpp
MIC Power Supply: MPWR pin
Output Voltage (Note 9)
Load Resistance
Load Capacitance
2.22
2.47
2.72
V
0.5
-
-
kΩ
-
-
30
pF
ADC Analog Input Characteristics: LIN1/RIN1/LIN2/RIN2/LIN4/RIN4 pins & LIN3/RIN3 pins (AIN3 bit = â1â)
â ADC â IVOL, IVOL=0dB, ALC=OFF
Resolution
Input Voltage (Note 10)
(Note 11)
(Note 12)
(Note 11, LIN1/RIN1/LIN2/RIN2)
S/(N+D)
(Note 11, LIN3/RIN3/LIN4/RIN4)
(â1dBFS)
(Note 12, except for LIN3/RIN3)
(Note 12, LIN3/RIN3)
D-Range (â60dBFS, A-weighted)
(Note 11)
(Note 12)
S/N (A-weighted)
(Note 11)
(Note 12)
Interchannel Isolation
(Note 11)
(Note 12)
Interchannel Gain Mismatch
(Note 11)
(Note 12)
-
0.168
1.68
71
-
-
-
76
-
76
-
75
-
-
-
-
0.198
1.98
83
83
88
72
86
95
86
95
90
100
0.1
0.1
16
0.228
2.28
-
-
-
-
-
-
-
-
-
-
0.8
0.8
Bits
Vpp
Vpp
dBFS
dBFS
dBFS
dBFS
dB
dB
dB
dB
dB
dB
dB
dB
Note 8. Ïϥεà³à¾ÏϯͱÏÎ Ïεà³à¾ÏÏ¯Í·à ©à·¼Í°Í¢É»ACΧοÏϦϯάίϯÏϯαÎÖ¤à³à¾ÏϯʹγϦÊ
ζʹàªà¬Í ͯԼÍÍÉ»MGAIN1-0 bits = â00âͷͱÍà ©à²à³à¾Í¸à¢à¼»Í¢Í°à¢ÛÉ»IN1+, IN1â, IN2+, IN2â pin
Í·à ·àà³à¾à°¿Ñ¹Í¸Í¦ÎͧÎAVDDÍ´àµºà¾«Í Î͢ɻVin = |(IN+) â (INâ)| = 0.069 x AVDD
(max)@MGAIN1-0 bits = â01â, 0.035 x AVDD (max)@MGAIN1-0 bits = â10â, 0.017 x AVDD
(max)@MGAIN1-0 bits = â11â.
ÍͷిѹÎÓ½ÍÎ৴߸Íà³à¾ÍÎͨà§ß¹ÉºADCÍ·à²à¡Í¸à¸à§Í°ÍÎͤÎÉ»
Note 9. à¥à¾à°¿Ñ¹Í¸AVDDÍ´àµºà¾«Í Î͢ɻVout = 0.75 x AVDD (typ)É»
Note 10. à³à¾à°¿Ñ¹Í¸AVDDÍ´àµºà¾«Í Î͢ɻVin = 0.06 x AVDD (typ)@MGAIN1-0 bits = â01â (+20dB), Vin = 0.6 x
AVDD(typ)@MGAIN1-0 bits = â00â (0dB)
Note 11. MGAIN1-0 bits = â01â (+20dB)
Note 12. MGAIN1-0 bits = â00â (0dB)
MS0986-J-00
-7-
2008/07
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