ASAHI KASEI
[AK4537]
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)
min
typ
max
Units
Parameter
MIC Amplifier:
Input Resistance
20
30
40
kΩ
Gain
(MGAIN bit = “0”)
-
0
-
dB
(MGAIN bit = “1”)
-
20
-
dB
MIC Power Supply:
Output Voltage
(Note 4)
2.22
2.47
2.72
V
Output Current
-
-
1.25
mA
Input PGA Characteristics:
Input Resistance
(LIN1, RIN1 pins)
5
10
15
kΩ
(Note 5)
(LIN2, RIN2 pins)
30
60
90
kΩ
Step Size
0.1
0.5
0.9
dB
Gain Control Range
(LIN1, RIN1 pins)
-
+27.5
dB
−8
(LIN2, RIN2 pins)
-
+12
dB
−23.5
ADC Analog Input Characteristics:
ALC1=OFF
Resolution
16
Bits
(Note 7)
0.168
0.198
0.228
Vpp
Input Voltage (Note 6)
(Note 8)
1.68
1.98
2.28
Vpp
(Note 7)
71
79
-
dBFS
S/(N+D)
(−1dBFS)
(Note 8)
-
88
-
dBFS
(Note 7)
75
83
-
dB
D-Range
(−60dBFS, A-weighted)
(Note 8)
-
91
-
dB
(Note 7)
75
83
-
dB
S/N
(A-weighted)
(Note 8)
-
91
-
dB
(Note 7)
75
90
-
dB
Interchannel Isolation
(Note 8)
-
100
-
dB
(Note 7)
-
0.1
0.5
dB
Interchannel Gain Mismatch
(Note 8)
-
0.1
0.5
dB
DAC Characteristics:
Resolution
-
-
16
Bits
Stereo Line Output Characteristics:
R
L
=10kΩ, DAC
→
LOUT, ROUT
1.94
Output Voltage (Note 9)
1.74
2.14
Vpp
S/(N+D)
(-3dBFS)
78
88
-
dBFS
85
92
-
dB
S/N
(A-weighted)
-
100
-
dB
Interchannel Isolation
-
0.1
0.5
dB
Interchannel Gain Mismatch
Load Resistance
10
-
-
kΩ
-
-
30
pF
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 8kΩ and 11kΩ (LIN1, RIN1), 48kΩ and 66kΩ
(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.
MS0202-E-04
-8-
2005/04
AKM [ ASAHI KASEI MICROSYSTEMS ]
