AK4644 Datasheet, PDF (7/96 Pages) Asahi Kasei Microsystems – Stereo CODEC with MIC/HP/RCV-AMP

ASAHI KASEI
[AK4644]
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
MIC Amplifier: LIN1/RIN1/LIN2/RIN2 pins & LIN3/RIN3 pins (AIN3 bit = “1”);
MDIF1=MDIF2 bits = “0” (Single-ended inputs)
Input
MGAIN1-0 bits = “00”
40
60
80
Resistance _{MGAIN1-0 bits = “01”, “10”or “11”}
20
30
40
MGAIN1-0 bits = “00”
-
0
-
Gain
MGAIN1-0 bits = “01”
MGAIN1-0 bits = “10”
-
+20
-
-
+26
-
MGAIN1-0 bits = “11”
-
+32
-
MIC Amplifier: IN1+/IN1−/IN2+/IN2− pins; MDIF1 = MDIF2 bits = “1” (Full-differential input)
Maximum Input Voltage (Note 8)
MGAIN1-0 bits = “01”
-
-
0.228
MGAIN1-0 bits = “10”
-
-
0.114
MGAIN1-0 bits = “11”
-
-
0.057
MIC Power Supply: MPWR pin
Output Voltage (Note 9)
2.22
2.47
2.72
Load Resistance
0.5
-
-
Load Capacitance
-
-
30
ADC Analog Input Characteristics: LIN1/RIN1/LIN2/RIN2 pins & LIN3/RIN3 pins (AIN3 bit = “1”)
→ ADC → IVOL, IVOL=0dB, ALC=OFF
Resolution
-
-
16
Input Voltage (Note 10)
(Note 11)
(Note 12)
0.168
1.68
0.198
1.98
0.228
2.28
(Note 11, LIN1/RIN1/LIN2/RIN2)
71
83
-
S/(N+D)
(Note 11, LIN3/RIN3)
-
83
-
(−1dBFS)
(Note 12, LIN1/RIN1/LIN2/RIN2)
-
88
-
(Note 12, LIN3/RIN3)
-
72
-
D-Range (−60dBFS, A-weighted)
(Note 11)
(Note 12)
76
-
86
95
-
-
S/N (A-weighted)
(Note 11)
76
86
-
(Note 12)
-
95
-
Interchannel Isolation
(Note 11)
75
90
-
(Note 12)
-
100
-
Interchannel Gain Mismatch
(Note 11)
-
(Note 12)
-
0.1
0.8
0.1
0.8
Units
kΩ
kΩ
dB
dB
dB
dB
Vpp
Vpp
Vpp
V
kΩ
pF
Bits
Vpp
Vpp
dBFS
dBFS
dBFS
dBFS
dB
dB
dB
dB
dB
dB
dB
dB
Note 8. 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 9. Output voltage is proportional to AVDD voltage. Vout = 0.75 x AVDD (typ)
Note 10. 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 11. MGAIN1-0 bits = “01” (+20dB)
Note 12. MGAIN1-0 bits = “00” (0dB)
MS0477-E-01
-7-
2006/10