AK4649 Datasheet, PDF (8/96 Pages) Asahi Kasei Microsystems – 24bit Stereo CODEC with MIC/SPK-AMP

[AK4649]
ANALOG CHARACTERISTICS
(Ta=25°C; AVDD=DVDD=SVDD=3.3V; VSS1=VSS2=VSS3=0V; fs=44.1kHz, BICK=64fs;
Signal Frequency=1kHz; 24bit Data; Measurement frequency=20Hz ∼ 20kHz; unless otherwise specified)
Parameter
min
typ
max
Units
MIC Amplifier: LIN1, RIN1, LIN2, RIN2 pins
Input Resistance
20
30
40
kΩ
Gain
MGAIN3-0 bits = “0000”
-1
0
+1
dB
MGAIN3-0 bits = “0001”
+19
+20
+21
dB
MGAIN3-0 bits = “0010”
+25
+26
+27
dB
MGAIN3-0 bits = “0100”
+8
+9
+10
dB
MGAIN3-0 bits = “0101”
+15
+16
+17
dB
MGAIN3-0 bits = “0110”
+22
+23
+24
dB
MGAIN3-0 bits = “0111”
+28
+29
+30
dB
MGAIN3-0 bits = “1000”
+2
+3
+4
dB
MGAIN3-0 bits = “1001”
+5
+6
+7
dB
MGAIN3-0 bits = “1010”
+11
+12
+13
dB
MIC Power Supply: MPWR pin
Output Voltage (Note 9)
2.38
2.64
2.90
V
Load Resistance
0.5
-
-
kΩ
Load Capacitance
-
-
30
pF
ADC Analog Input Characteristics: LIN1/RIN1/LIN2/RIN2 pins → ADC → IVOL, IVOL=0dB, ALC=OFF
Resolution
-
-
24
Bits
Input Voltage (Note 10)
(Note 11)
(Note 12)
0.208
2.08
0.231
2.31
0.254
Vpp
2.54
Vpp
S/(N+D) (−1dBFS)
(Note 11)
70
80
(Note 12)
-
80
-
dBFS
-
dBFS
D-Range (−60dBFS, A-weighted)
(Note 11)
(Note 12)
79
-
89
100
-
dB
-
dB
S/N
(A-weighted)
(Note 11)
79
(Note 12)
-
89
100
-
dB
-
dB
Interchannel Isolation
(Note 11)
75
90
(Note 12)
-
100
-
dB
-
dB
Interchannel Gain Mismatch
(Note 11)
-
(Note 12)
-
0
0.8
dB
0
0.8
dB
Note 9. Output voltage is proportional to AVDD voltage. Vout = 0.8 x AVDD (typ)
Note 10. Input voltage is proportional to AVDD voltage. Vin = 0.07 x AVDD (typ) @MGAIN3-0 bits = “0001” (+20dB),
Vin = 0.7 x AVDD (typ) @MGAIN3-0 bits = “0000” (0dB)
Note 11. MGAIN3-0 bits = “0001” (+20dB)
Note 12. MGAIN3-0 bits = “0000” (0dB)
MS1023-E-01
-8-
2010/08