AK4538 Datasheet, PDF (7/70 Pages) Asahi Kasei Microsystems – 16Bit DS CODEC with MIC/HP/SPK-AMP

ASAHI KASEI
[AK4538]
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
min
typ
max
Units
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
MIC Detection
Comparator Voltage Level (Note 5)
0.165
0.247
mV
Internal pull down Resistance
250
500
750
kΩ
Input PGA Characteristics:
Input Resistance (Note 6)
5
10
15
kΩ
Step Size
0.1
0.5
0.9
dB
Gain Control Range
−8
+27.5
dB
ADC Analog Input Characteristics: MIC Gain=20dB, IPGA=0dB, ALC1=OFF, MIC → IPGA → ADC
Resolution
16
Bits
Input Voltage (MIC Gain=20dB, Note 7)
0.168
0.198
0.228
Vpp
S/(N+D)
(−1dBFS)
71
79
dB
D-Range
(−60dBFS, A-weighted)
75
83
dB
S/N
(A-weighted)
75
83
dB
DAC Characteristics:
Resolution
16
Bits
Stereo Line Output Characteristics: R_L=10kΩ, DAC → LOUT/ROUT
Output Voltage (Note 8)
1.74
1.94
2.14
Vpp
S/(N+D) (-3dBFS)
78
88
dBFS
S/N
(A-weighted)
85
92
dB
Interchannel Gain Mismatch
0.1
0.5
dB
Load Resistance
10
kΩ
Load Capacitance
30
pF
Mono Line Output Characteristics: R_L=20kΩ, DAC → MOUT+/MOUT-
Output Voltage (Note 9)
MOGN=1, -17dB
-
0.31
-
Vpp
MOGN=0, +6dB
3.56
3.96
4.36
Vpp
S/(N+D) (-3dBFS)
MOGN=1, -17dB
-
76
dBFS
MOGN=0, +6dB
79
89
dBFS
S/N
(A-weighted)
MOGN=1, -17dB
-
79
dB
MOGN=0, +6dB
85
95
dB
Load Resistance
MOGN=1, -17dB
2
kΩ
MOGN=0, +6dB
20
kΩ
Load Capacitance
30
pF
Note 4. Output voltage is proportional to AVDD voltage. Vout = 0.75 x AVDD.
Note 5. Comparator Voltage Level is proportional to AVDD voltage. Vout = 0.05 x AVDD(min), 0.075 x AVDD(max).
Note 6. When IPGA Gain is changed, this typical value changes between 8kΩ and 11kΩ.
Note 7. Input voltage is proportional to AVDD voltage. Vin = 0.06 x AVDD.
Note 8. Output voltage is proportional to AVDD voltage. Vout = 0.588 x AVDD.
Note 9. Output voltage is proportional to AVDD voltage. Vout = 1.2 x AVDD(typ)@MOGN=0,
0.094 x AVDD(typ)@MOGN=1 at Full-differential output.
Vout = 0.6 x AVDD(typ)@MOGN=0, 0.047 x AVDD(typ) @MOGN=1 at Single-end Output.
MS0198-E-01
-7-
2003/5