[AK4675]
ANALOG CHARACTERISTICS (CODEC)
(Ta=25°C; AVDD=PVDD=SAVDD=DVDD=TVDD2=TVDD3=AVDDA=PVDDA=TVDDA=3.3V, SVDDA=3.6V;
VSS1=VSS2=VSS3=VSS4=VSS1A=VSS2A=VSS3A=0V; Signal Frequency=1kHz; 16bit Data; fs=44.1kHz,
BICK=64fs, LP bit = “0”; Measurement frequency=20Hz ∼ 20kHz; unless otherwise specified)
min
typ
max
Units
Parameter
MIC Amplifier: LIN1/RIN1/LIN2/RIN2/LIN3/RIN3/LIN4/RIN4 pins; PMAINL1/R1/L2/R2/L3/R3/L4/R4 bits = “0”
Input Resistance
MGNL/R0 bit = “0”
MGNL/R0 bit = “1”
28
20
42
30
56
40
kΩ
kΩ
Gain (Note 17)
Max (MGNL/R3-0 bits = “FH”)
Min (MGNL/R3-0 bits = “1H”)
-
-
+30
−12
-
-
dB
dB
MIC Power Supply: MPWR pin
Output Voltage (Note 18)
Load Resistance
Load Capacitance
2.47
0.5
-
2.64
-
-
2.81
-
30
V
kΩ
pF
MIC Detection: MDT pin
Comparator Voltage Level (Note 19)
Internal pull down Resistance
Stereo ADC Analog Input Characteristics:
0.247
750
0.165
250
mV
kΩ
500
LIN1/RIN1/LIN2/RIN2/LIN3/RIN3/LIN4/RIN4 pins → Stereo ADC → IVOL, IVOL=0dB, ALC=OFF
Resolution
-
-
0.176
1.98
82
87
86
95
86
95
90
16
0.203
2.28
-
-
-
-
-
-
-
-
0.8
0.8
Bits
Vpp
Vpp
dB
dB
dB
dB
dB
dB
dB
(Note 21)
(Note 22)
(Note 21)
(Note 22)
(Note 21)
(Note 22)
(Note 21)
(Note 22)
(Note 21)
(Note 22)
(Note 21)
(Note 22)
0.150
Input Voltage (Note 20)
1.68
72
-
75
-
75
-
75
-
S/(N+D) (−1dBFS)
D-Range (−60dBFS, A-weighted)
S/N (A-weighted)
Interchannel Isolation
100
0.1
0.1
dB
dB
dB
-
-
Interchannel Gain Mismatch
Note 17. In case of full-differential input, MGAIN=0dB (min) and AVDD=2.4V (min).
Note 18. Output voltage is proportional to AVDD voltage. Vout = 0.8 x AVDD (typ).
Note 19. Comparator Voltage Level is proportional to AVDD voltage. Vth = 0.05 x AVDD(min), 0.075 x AVDD(max).
Note 20. Input voltage is proportional to AVDD voltage. Vin = 0.053 x AVDD (typ)@MGNL3-0=MGNR3-0 bits =
“CH” (+21dB), Vin = 0.6 x AVDD(typ)@MGNL3-0=MGNR3-0 bits = “5H” (0dB).
Note 21. MGNL3-0=MGNR3-0 bits = “CH” (+21dB).
Note 22. MGNL3-0=MGNR3-0 bits = “5H” (0dB).
MS0963-E-00
2008/05
- 12 -
AKM [ ASAHI KASEI MICROSYSTEMS ]
