AK4646EZ Datasheet, PDF (8/78 Pages) Asahi Kasei Microsystems – Stereo CODEC with MIC/SPK-AMP

[AK4646EZ]
ANALOG CHARACTERISTICS
(Ta=25°C; AVDD, DVDD, SVDD=3.3V; AVSS=DVSS=SVSS=0V; fs=44.1kHz, BICK=64fs;
Signal Frequency=1kHz; 16bit Data; Measurement frequency=20Hz ∼ 20kHz; unless otherwise specified)
Parameter
min
typ
max
Units
MIC Amplifier: LIN1, RIN1, LIN2, RIN2 pins; MDIF1 = MDIF2 bits = “0” (Single-ended inputs)
Input Resistance
20
30
40
kΩ
MGAIN2-0 bits = “000”
-
0
-
dB
Gain
MGAIN2-0 bits = “001”
MGAIN2-0 bits = “010”
-
+20
-
dB
-
+26
-
dB
MGAIN2-0 bits = “011”
-
+32
-
dB
MGAIN2-0 bits = “100”
-
+10
-
dB
MGAIN2-0 bits = “101”
-
+17
-
dB
MGAIN2-0 bits = “110”
-
+23
-
dB
MGAIN2-0 bits = “111”
-
+29
-
dB
MIC Amplifier: IN1+, IN1−, IN2+, IN2− pins; MDIF1 = MDIF2 bits = “1” (Full-differential input)
Input Voltage (Note 12)
MGAIN2-0 bits = “001”
-
-
0.242
Vpp
MGAIN2-0 bits = “010”
-
-
0.121
Vpp
MGAIN2-0 bits = “011”
-
-
0.061
Vpp
MGAIN2-0 bits = “100”
-
-
0.765
Vpp
MGAIN2-0 bits = “101”
-
-
0.342
Vpp
MGAIN2-0 bits = “110”
-
-
0.171
Vpp
MGAIN2-0 bits = “111”
-
-
0.086
Vpp
MIC Power Supply: MPWR pin
Output Voltage (Note 13)
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
-
-
16
Bits
Input Voltage (Note 14)
(Note 15)
(Note 16)
0.178
1.78
0.210
2.10
0.242
Vpp
2.42
Vpp
S/(N+D) (−1dBFS)
(Note 15)
73
83
(Note 16)
-
88
-
dBFS
-
dBFS
D-Range (−60dBFS, A-weighted)
(Note 15)
(Note 16)
76
-
86
95
-
dB
-
dB
S/N
(A-weighted)
(Note 15)
76
(Note 16)
-
86
95
-
dB
-
dB
Interchannel Isolation
(Note 15)
75
90
(Note 16)
-
100
-
dB
-
dB
Interchannel Gain Mismatch
(Note 15)
-
(Note 16)
-
0.1
0.8
dB
0.1
0.8
dB
Note 12. 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 MGAIN2-0 bits = “000”. Maximum input voltage of
IN1+, IN1−, IN2+ and IN2− pins is proportional to AVDD voltage, respectively.
Vin = |(IN1/2+) − (IN1/2−)| = 0.073 x AVDD (max)@MGAIN2-0 bits = “001”, 0.037 x AVDD
(max)@MGAIN2-0 bits = “010”, 0.018 x AVDD (max)@MGAIN2-0 bits = “011”, 0.232 x AVDD
(max)@MGAIN2-0 bits = “100”, 0.104 x AVDD (max)@MGAIN2-0 bits = “101”, 0.052 x AVDD
(max)@MGAIN2-0 bits = “110”, 0.026 x AVDD (max)@MGAIN2-0 bits = “111”
Note 13. Output voltage is proportional to AVDD voltage. Vout = 0.8 x AVDD (typ)
Note 14. Input voltage is proportional to AVDD voltage Vin = 0.0636 x AVDD (typ)@MGAIN2-0 bits = “001” (+20dB),
Vin = 0.636 x AVDD (typ)@MGAIN2-0 bits = “000” (0dB)
Note 15. MGAIN2-0 bits = “001” (+20dB)
Note 16. MGAIN2-0 bits = “000” (0dB)
MS0630-E-00
-8-
2007/06