AK4954AEN Datasheet, PDF (9/26 Pages) Asahi Kasei Microsystems – 32bit Stereo CODEC with MIC/HP/SPK-AMP

[AK4954A]
アナログ特性
(Ta=25°C; AVDD=SVDD=3.3V, TVDD=DVDD=1.8V; VSS1=VSS2=VSS3=0V; fs=44.1kHz, BICK=64fs;
Signal Frequency=1kHz; 24bit Data; Measurement Bandwidth=20Hz ∼ 20kHz; unless otherwise specified)
Parameter
min
typ
max
Unit
MIC Amplifier: LIN1, RIN1, LIN2, RIN2, LIN3, RIN3 pins
Input Resistance
70
100
140
kΩ
Gain
MGAIN2-0 bits = “000”
+5
+6
+7
dB
MGAIN2-0 bits = “001”
+12
+13
+14
dB
MGAIN2-0 bits = “010”
+19
+20
+21
dB
MGAIN2-0 bits = “011”
+25
+26
+27
dB
MGAIN2-0 bits = “1xx”
-
0
-
dB
MIC Power Supply: MPWR1, MPWR2 pins
Output Voltage (Note 10)
Output Noise Level (A-weighted)
PSRR (fin = 1kHz) (Note 11)
Load Resistance
Load Capacitance
2.51
2.64
2.77
V
-
-120
-
dBV
-
70
-
dB
1.0
-
-
kΩ
-
-
15
pF
ADC Analog Input Characteristics: LIN1/RIN1/LIN2/RIN2/LIN3/RIN3 pins → ADC → Programmable Filter
(IVOL=0dB, EQ=ALC=OFF) → SDTO; C_ext1 = 1μF, C_ext2 = 1nF (Note 12)
Resolution
-
-
32
Bits
Input Voltage (Note 13)
(Note 14)
(Note 15)
0.237
2.37
0.264
2.64
0.29
Vpp
2.90
Vpp
fs=44.1kHz (Note 14)
78
88
-
dBFS
S/(N+D) (−1dBFS)
BW=20kHz (Note 15)
fs=96kHz (Note 14)
-
-
88
85
-
dBFS
-
dBFS
BW=40kHz (Note 15)
-
82
-
dBFS
D-Range (−60dBFS, A-weighted)
(Note 14)
(Note 15)
87
-
97
100
-
dB
-
dB
S/N (A-weighted)
(Note 14)
87
97
(Note 15)
-
100
-
dB
-
dB
Interchannel Isolation
(Note 14)
80
100
(Note 15)
-
100
-
dB
-
dB
Interchannel Gain Mismatch
(Note 14)
-
(Note 15)
-
0
0.8
dB
0
0.5
dB
PSRR (fin = 1kHz) (Note 11, Note 14)
-
40
-
dB
Note 10. 出力電圧は AVDD に比例します。(typ. 0.8 x AVDD V)
Note 11. AVDD に、100mVpp の正弦波を重畳した場合
Note 12. Figure 2 測定回路にて仕様を規定しています。(C_ext2 の位置は入力 pin - VSS1 間でも構いません。)
Cext1
Signal Input
ADC Input
Cext2
Figure 2. ADC アナログ特性測定回路
Note 13. 入力フルスケール電圧は AVDD に比例します。
typ. 0.8 x AVDD Vpp (0dB), typ. 0.08 x AVDD Vpp (+20dB)
Note 14. MGAIN2-0 bits = “010” (+20dB)
Note 15. MGAIN2-0 bits = “1xx” (0dB)
MS1542-J-00-PB
-9-
2013/06