AK4642EN Datasheet, PDF (10/83 Pages) Asahi Kasei Microsystems – Stereo CODEC with MIC/HP/SPK-AMP

ASAHI KASEI
[AK4642EN]
ANALOG CHARACTERISTICS
(Ta=25°C; AVDD, DVDD, HVDD=3.3V; AVSS=DVSS=HVSS=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
MGAIN1-0 bits = “00”
40
60
80
kΩ
Resistance _{MGAIN1-0 bits = “01”, “10”or “11”}
20
30
40
kΩ
MGAIN1-0 bits = “00”
-
0
-
dB
Gain
MGAIN1-0 bits = “01”
MGAIN1-0 bits = “10”
-
+20
-
dB
-
+26
-
dB
MGAIN1-0 bits = “11”
-
+32
-
dB
MIC Amplifier: IN1+, IN1−, IN2+, IN2− pins; MDIF1 = MDIF2 bits = “1” (Full-differential input)
Maximum Input Voltage (Note 12)
MGAIN1-0 bits = “01”
-
-
0.228
Vpp
MGAIN1-0 bits = “10”
-
-
0.114
Vpp
MGAIN1-0 bits = “11”
-
-
0.057
Vpp
MIC Power Supply: MPWR pin
Output Voltage (Note 13)
2.22
2.47
2.72
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)
0.168
1.68
0.198
1.98
0.228
Vpp
2.28
Vpp
S/(N+D) (−1dBFS)
(Note 15)
71
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
86
(Note 16)
-
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 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 13. Output voltage is proportional to AVDD voltage. Vout = 0.75 x AVDD (typ)
Note 14. 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 15. MGAIN1-0 bits = “01” (+20dB)
Note 16. MGAIN1-0 bits = “00” (0dB)
MS0420-E-00
- 10 -
2005/09