ASAHI KASEI
[AK4642]
min
-
typ
-
max
16
Units
Bits
Parameter
DAC Characteristics:
Resolution
Stereo Line Output Characteristics: DAC → LOUT, ROUT pins, ALC=OFF, IVOL=0dB, DVOL=0dB, LOVL bit =
“0”, RL=10kΩ
Output Voltage (Note 17)
LOVL bit = “0”
LOVL bit = “1”
1.78
2.25
78
82
80
-
1.98
2.50
88
2.18
2.75
-
-
-
0.5
-
30
Vpp
Vpp
dBFS
dB
dB
dB
S/(N+D)
S/N
(−3dBFS)
(A-weighted)
92
Interchannel Isolation
Interchannel Gain Mismatch
Load Resistance
100
0.1
-
10
-
kΩ
pF
Load Capacitance
-
Headphone-Amp Characteristics: DAC → HPL/HPR pins, ALC=OFF, IVOL=0dB, DVOL=0dB
(Note 19)
(Note 20)
(Note 19)
(Note 20)
(Note 19)
(Note 20)
(Note 19)
(Note 20)
(Note 19)
(Note 20)
(Note 19)
(Note 20)
1.58
2.40
60
-
80
-
65
-
-
1.98
3.00
70
80
90
90
75
80
0.1
0.1
-
2.38
3.60
-
-
-
-
-
-
Vpp
Vpp
dBFS
dBFS
dB
dB
dB
dB
dB
dB
Ω
Ω
pF
Output Voltage (Note 18)
S/(N+D)
S/N
(−3dBFS)
(A-weighted)
Interchannel Isolation
Interchannel Gain Mismatch
Load Resistance
0.8
0.8
-
-
22
100
-
-
-
-
-
Figure 2のC1
Figure 2のC2
30
300
Load Capacitance
-
pF
Note 17. 出力電圧はAVDDに比例します。Vout = 0.6 x AVDD (typ)@LOVL bit = “0”.
Note 18. 出力電圧はAVDDに比例します。
Vout = 0.6 x AVDD(typ)@HPG bit = “0”, 0.91 x AVDD(typ)@HPG bit = “1”.
Note 19. HPG bit = “0”, HVDD=3.3V, RL=22.8Ω.
Note 20. HPG bit = “1”, HVDD=5V, RL=100Ω.
HP-Amp
HPL/HPR pin
47µF
6.8Ω
16Ω
C1
C2
Figure 2. ヘッドフォンアンプ出力回路
MS0358-J-02
2005/04
- 11 -
AKM [ ASAHI KASEI MICROSYSTEMS ]
