參數(shù)資料
型號(hào)： AK4673
廠商： Asahi Kasei Microsystems Co.,Ltd
元件分類： Codec
英文描述： Stereo CODEC with MIC/HP-AMP and Touch Screen Controller
中文描述： 立體聲編解碼器麥克風(fēng)/惠普- AMP及觸摸屏控制器
文件頁(yè)數(shù)： 9/107頁(yè)
文件大?。?/td> 1171K
代理商： AK4673
[AK4673]
MS0670-E-00
2007/09
- 9 -
ANALOG CHARACTERISTICS
(Ta=25
°
C; AVDD=DVDD=TVDD1=TVDD2=HVDD=TSVDD=3.3V; VSS1=VSS2=VSS3=0V; fs=44.1kHz,
BICK=64fs; Signal Frequency=1kHz; 16bit Data; Measurement frequency=20Hz
～
20kHz; unless otherwise specified)
Parameter
MIC Amplifier:
LIN1/RIN1/LIN2/RIN2/LIN4/RIN4 pins & LIN3/RIN3 pins (AIN3 bit = “1”);
MDIF1=MDIF2 bits = “0” (Single-ended inputs)
MGAIN1-0 bits = “00”
Input
Resistance
MGAIN1-0 bits = “01”, “10”or “11”
MGAIN1-0 bits = “00”
MGAIN1-0 bits = “01”
MGAIN1-0 bits = “10”
MGAIN1-0 bits = “11”
MIC Amplifier:
IN1+/IN1
/IN2+/IN2
pins; MDIF1 = MDIF2 bits = “1” (Full-differential input)
Input Voltage (
Note 8
)
MGAIN1-0 bits = “01”
MGAIN1-0 bits = “10”
MGAIN1-0 bits = “11”
MIC Power Supply:
MPWR pin
Output Voltage (
Note 9
)
Load Resistance
Load Capacitance
ADC Analog Input Characteristics:
LIN1/RIN1/LIN2/RIN2/LIN4/RIN4 pins & LIN3/RIN3 pins (AIN3 bit = “1”)
→
ADC
→
IVOL, IVOL=0dB, ALC=OFF
Resolution
(
Note 11
)
Input Voltage (
Note 10
)
(
Note 12
)
(
Note 11
, LIN1/RIN1/LIN2/RIN2)
(
Note 11
, LIN3/RIN3/LIN4/RIN4)
(
Note 12
, except for LIN3/RIN3)
(
1dBFS)
(
Note 12
, LIN3/RIN3)
(
Note 11
)
D-Range (
60dBFS, A-weighted)
(
Note 12
)
(
Note 11
)
S/N (A-weighted)
(
Note 12
)
(
Note 11
)
Interchannel Isolation
(
Note 12
)
(
Note 11
)
Interchannel Gain Mismatch
(
Note 12
)
Note 8. The voltage difference between IN1/2+ and IN1/2
pins. AC coupling capacitor should be inserted in series at
each input pin. Full-differential mic input is not available at MGAIN1-0 bits = “00”. Maximum input voltage of
IN1+, IN1
, IN2+ and IN2
pins is proportional to AVDD voltage, respectively.
Vin = 0.069 x AVDD (max)@MGAIN1-0 bits = “01”, 0.035 x AVDD (max)@MGAIN1-0 bits = “10”, 0.017 x
AVDD (max)@MGAIN1-0 bits = “11”.
When the signal larger than above value is input to IN1+, IN1
, IN2+ or IN2
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 = “01” (+20dB),
Vin = 0.6 x AVDD(typ)@MGAIN1-0 bits = “00” (0dB)
Note 11. MGAIN1-0 bits = “01” (+20dB)
Note 12. MGAIN1-0 bits = “00” (0dB)
min
typ
max
Units
40
20
-
-
-
-
60
30
0
+20
+26
+32
80
40
-
-
-
-
k
Ω
k
Ω
dB
dB
dB
dB
Gain
-
-
-
-
-
-
0.228
0.114
0.057
2.72
-
30
Vpp
Vpp
Vpp
V
k
Ω
pF
2.22
0.5
-
2.47
-
-
-
-
16
Bits
Vpp
Vpp
dBFS
dBFS
dBFS
dBFS
dB
dB
dB
dB
dB
dB
dB
dB
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
0.228
2.28
-
-
-
-
-
-
-
-
-
-
0.8
0.8
S/(N+D)
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