
ASAHI KASEI
[AK4537]
MS0202-E-04
2005/04
- 8 -
ANALOG CHARACTERISTICS
(Ta=25
°
C; AVDD, DVDD, PVDD, HVDD=3.3V; AVSS=DVSS=PVSS=HVSS=0V; fs=44.1kHz, BICK=64fs;
Signal Frequency=1kHz; 16bit Data; Measurement frequency=20Hz
~
20kHz; unless otherwise specified)
Parameter
MIC Amplifier:
Input Resistance
Gain
(MGAIN bit = “0”)
(MGAIN bit = “1”)
MIC Power Supply:
Output Voltage
(Note 4)
Output Current
Input PGA Characteristics:
Input Resistance
(LIN1, RIN1 pins)
(Note 5)
(LIN2, RIN2 pins)
Step Size
Gain Control Range
(LIN1, RIN1 pins)
(LIN2, RIN2 pins)
ADC Analog Input Characteristics:
ALC1=OFF
Resolution
(Note 7)
Input Voltage (Note 6)
(Note 8)
(Note 7)
S/(N+D)
(
1dBFS)
(Note 8)
(Note 7)
D-Range
(
60dBFS, A-weighted)
(Note 8)
(Note 7)
S/N
(A-weighted)
(Note 8)
(Note 7)
Interchannel Isolation
(Note 8)
(Note 7)
Interchannel Gain Mismatch
(Note 8)
DAC Characteristics:
Resolution
Stereo Line Output Characteristics:
R
L
=10k
, DAC
→
LOUT, ROUT
Output Voltage
(Note 9)
S/(N+D)
(-3dBFS)
S/N
(A-weighted)
Interchannel Isolation
Interchannel Gain Mismatch
Load Resistance
Load Capacitance
Note 4. Output voltage is proportional to AVDD voltage. Vout = 0.75 x AVDD.
Note 5. When IPGA Gain is changed, this typical value changes between 8k
and 11k
(LIN1, RIN1), 48k
and 66k
(LIN2, RIN2).
Note 6. Input voltage is proportional to AVDD voltage. Vin = 0.06 x AVDD)@Mic In, Vin = 0.6 x AVDD(typ)@Line In.
Note 7. MIC Gain=20dB, IPGA=0dB, ALC1=OFF, INT(MICL)/EXT(MICR)
→
IPGA
→
ADC
Note 8. IPGA=0dB, ALC1=OFF, LIN2/RIN2
→
IPGA
→
ADC
Note 9. Output voltage is proportional to AVDD voltage. Vout = 0.588 x AVDD.
min
20
-
-
2.22
-
5
30
0.1
8
23.5
typ
30
0
20
2.47
-
10
60
0.5
-
-
max
40
-
-
2.72
1.25
15
90
0.9
+27.5
+12
Units
k
dB
dB
V
mA
k
k
dB
dB
dB
16
Bits
Vpp
Vpp
dBFS
dBFS
dB
dB
dB
dB
dB
dB
dB
dB
0.168
1.68
71
-
75
-
75
-
75
-
-
-
0.198
1.98
79
88
83
91
83
91
90
100
0.1
0.1
0.228
2.28
-
-
-
-
-
-
-
-
0.5
0.5
-
-
16
Bits
1.74
78
85
-
-
10
-
1.94
88
92
100
0.1
-
-
2.14
-
-
-
0.5
-
30
Vpp
dBFS
dB
dB
dB
k
pF