ASAHI KASEI
[AK4645]
min
typ
max
Units
Parameter
Headphone-Amp Characteristics:
DAC
→
HPL/HPR pins, ALC=OFF, IVOL=0dB, DVOL=0dB; VBAT bit = “0”;
unless otherwise specified.
Output Voltage (Note 15)
1.58
1.98
2.38
Vpp
HPG bit = “0”, 0dBFS, HVDD=3.3V, R
L
=22.8Ω
2.40
3.00
3.60
Vpp
HPG bit = “1”, 0dBFS, HVDD=5V, R
L
=100Ω
HPG bit = “1”, 0dBFS, HVDD=3.3V, R
L
=16Ω (Po=62mW)
-
1.0
-
Vrms
HPG bit = “1”, 0dBFS, HVDD=5V, R
L
=16Ω (Po=70mW)
-
1.06
-
Vrms
S/(N+D)
60
70
-
dBFS
HPG bit = “0”,
−3dBFS,
HVDD=3.3V, R
L
=22.8Ω
-
80
-
dBFS
HPG bit = “1”,
−3dBFS,
HVDD=5V, R
L
=100Ω
HPG bit = “1”, 0dBFS, HVDD=3.3V, R
L
=16Ω (Po=62mW)
-
20
-
dBFS
HPG bit = “1”, 0dBFS, HVDD=5V, R
L
=16Ω (Po=70mW)
-
70
-
dBFS
(Note 16)
80
90
-
dB
S/N (A-weighted)
(Note 17)
-
90
-
dB
(Note 16)
65
75
-
dB
Interchannel Isolation
(Note 17)
-
80
-
dB
(Note 16)
-
0.1
0.8
dB
Interchannel Gain Mismatch
(Note 17)
-
0.1
0.8
dB
Load Resistance
16
-
-
Ω
-
-
30
pF
Figure 2のC1
Load Capacitance
-
-
300
pF
Figure 2のC2
Note 15.
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 16. HPG bit = “0”, HVDD=3.3V, R
L
=22.8Ω.
Note 17. HPG bit = “1”, HVDD=5V, R
L
=100Ω.
HP-Amp
HPL/HPR pin
47µF
6.8Ω
C1
0.22µF
10Ω
C2
16Ω
Measurement Point
Figure 2.
ヘッドフォンアンプ出力回路
MS0543-J-00
-9-
2006/09
AKM [ ASAHI KASEI MICROSYSTEMS ]
