[AK4958]
アナログ特性
(Ta=25C; fs=48kHz, BICK=64fs; Signal Frequency=1kHz; 24bit Data; Measurement Bandwidth =20Hz 20kHz; unless
otherwise specified; AK4958EG: AVDD = 3.3V, DVDD = TVDD= 1.8V; VSS1=VSS2=VSS3=VSS4=0V,
AK4958ECB: AVDD = 3.3V, DTVDD = 1.8V; VSS1=VSS2=0V)
Parameter
min
typ
max
Unit
MIC Amplifier: LIN1, RIN1, LIN2, RIN2 pins
Input Resistance
20
1
+5
+11
+14
+17
+20
+24
+29
30
0
+6
+12
+15
+18
+21
+25
+30
42
+1
+7
+13
+16
+19
+22
+26
+31
k
dB
dB
dB
dB
dB
dB
dB
dB
MGAIN2-0 bits = “000”
MGAIN2-0 bits = “001”
Gain
MGAIN2-0 bits = “010”
MGAIN2-0 bits = “011”
MGAIN2-0 bits = “100”
MGAIN2-0 bits = “101”
MGAIN2-0 bits = “110”
MGAIN2-0 bits = “111”
MIC Power Supply: MPWR pin
MICL bit = “0”
MICL bit = “1”
Output Noise Level (A-weighted)
Load Resistance
2.2
1.8
-
0.5
-
2.4
2.0
108
-
2.6
2.2
-
-
30
-
V
V
dBV
k
pF
Output Voltage
Load Capacitance
-
PSRR (Sine Wave = 500mVpp, fin =1kHz)
-
100
dB
ADC Analog Input Characteristics:
AK4958EG: LIN1/RIN1/LIN2/RIN2 pins ADC (Programmable Filter = OFF)
AK4958ECB: LIN1/RIN1 pins ADC (Programmable Filter = OFF)
Resolution
-
-
-
0.261
2.07
83
85
88
96
88
96
90
24
-
2.28
-
-
-
-
-
-
-
-
0.5
0.5
-
Bits
Vpp
Vpp
dBFS
dBFS
dB
dB
dB
dB
dB
(Note 13)
(Note 14)
(Note 13)
(Note 14)
(Note 13)
(Note 14)
(Note 13)
(Note 14)
(Note 13)
(Note 14)
(Note 13)
(Note 14)
Input Voltage (Note 12)
1.86
73
-
78
-
78
-
75
-
S/(N+D)
D-Range
S/N
(1dBFS)
(60dBFS, A-weighted)
(A-weighted)
Interchannel Isolation
100
0
0
dB
dB
dB
dB
-
-
-
Interchannel Gain Mismatch
PSRR (Sine Wave = 500mVpp, fin =1kHz)
80
Note 12. Vin = 0.9 x 2.3Vpp (typ) @MGAIN2-0 bits = “000” (0dB)
Note 13. MGAIN2-0 bits = “100” (+18dB)
Note 14. MGAIN2-0 bits = “000” (0dB)
MS1558-J-01-PB
2013/10
- 14 -
AKM [ ASAHI KASEI MICROSYSTEMS ]
