|
AK4645 Datasheet, PDF (7/96 Pages) Asahi Kasei Microsystems – Stereo CODEC with MIC/HP-AMP | |||
|
◁ |
ASAHI KASEI
[AK4645]
ANALOG CHARACTERISTICS
(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
Resistance MGAIN1-0 bits = â01â, â10âor â11â
20
30
80
kâ¦
40
kâ¦
MGAIN1-0 bits = â00â
-
0
-
dB
Gain
MGAIN1-0 bits = â01â
MGAIN1-0 bits = â10â
-
+20
-
+26
-
dB
-
dB
MGAIN1-0 bits = â11â
-
+32
-
dB
MIC Amplifier: IN1+/IN1â/IN2+/IN2â pins; MDIF1 = MDIF2 bits = â1â (Full-differential input)
Maximum Input Voltage (Note 8)
MGAIN1-0 bits = â01â
-
-
0.228
Vpp
MGAIN1-0 bits = â10â
-
-
0.114
Vpp
MGAIN1-0 bits = â11â
-
-
0.057
Vpp
MIC Power Supply: MPWR pin
Output Voltage (Note 9)
2.22
2.47
2.72
V
Load Resistance
0.5
-
-
kâ¦
Load Capacitance
-
-
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
-
-
16
Bits
Input Voltage (Note 10)
(Note 11)
(Note 12)
0.168
1.68
0.198
1.98
0.228
Vpp
2.28
Vpp
(Note 11, LIN1/RIN1/LIN2/RIN2)
71
83
-
dBFS
S/(N+D)
(Note 11, LIN3/RIN3/LIN4/RIN4)
-
83
-
dBFS
(â1dBFS)
(Note 12, except for LIN3/RIN3)
-
88
-
dBFS
(Note 12, LIN3/RIN3)
-
72
-
dBFS
D-Range (â60dBFS, A-weighted)
(Note 11)
(Note 12)
76
-
86
95
-
dB
-
dB
S/N (A-weighted)
(Note 11)
76
86
(Note 12)
-
95
-
dB
-
dB
Interchannel Isolation
(Note 11)
75
90
(Note 12)
-
100
-
dB
-
dB
Interchannel Gain Mismatch
(Note 11)
-
(Note 12)
-
0.1
0.1
0.8
dB
0.8
dB
Note 8. The voltage difference between IN1/2+ and IN1/2â pins. AC coupling capacitor should be inserted in series at
each input pin. Full-differential mic input is not available at MGAIN1-0 bits = â00â. Maximum input voltage of
IN1+, IN1â, IN2+ and IN2â pins is proportional to AVDD voltage, respectively.
Vin = 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.
When the signal larger than above value is input to IN1+, IN1â, IN2+ or IN2â pin, ADC does not operate
normally.
Note 9. Output voltage is proportional to AVDD voltage. Vout = 0.75 x AVDD (typ)
Note 10. Input voltage is proportional to AVDD voltage. Vin = 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)
MS0543-E-00
-7-
2006/09
|
▷ |