AK4640VG Asahi Kasei Microsystems, AK4640VG Datasheet - Page 12

• Manufacturer Part Number: AK4640VG
• Description: 16BIT CODEC WITH MIC /HP/SPK-AMPl
• Manufacturer: Asahi Kasei Microsystems

ASAHI KASEI
Parameter
Headphone-Amp Characteristics: R
Output Voltage
S/(N+D)
S/N
Interchannel Isolation
Interchannel Gain Mismatch
Load Resistance
Load Capacitance
Speaker-Amp Characteristics: R
Output Voltage
(Note 9)
S/(N+D)
S/N
Load Resistance
Load Capacitance
BEEP Input: BEEPL, BEEPR, BEEPM pins
Maximum Input Voltage (Note 10)
Output Voltage (Input Voltage=0.3Vpp, External Input Resistance=10kΩ)
Note 8. Output voltage is proportional to AVDD voltage. Vout = 0.582 x AVDD(typ).
Note 9. Output voltage is proportional to AVDD voltage. Vout = 0.936 x AVDD(typ)@−3dBFS at Full-differential
output.
Note 10. BEEP-AMP can’t output more than this maximum voltage.
MS0273-E-00
BEEPL
BEEPR
BEEPL
BEEPR
BEEPM
BEEPM
BEEPM
HPL
SPP/N (BEEPR=No signal)
HPR
SPP/N (BEEPL=No signal)
HPL
HPR
SPP/N
(Note 8)
(−3dBFS)
(A-weighted)
(A-weighted)
(0dBFS)
(−3dBFS)
(−3dBFS, Po=150mW)
(0dBFS, Po=300mW)
(ALC2=ON, Po=250mW)
(C1 in Figure 2)
(C2 in Figure 2)
HP-Amp
L
=8Ω, BTL, DAC → MOUT2 pin → MIN pin → SPP/SPN pins, ALC2=OFF
Figure 2. Headphone-amp output circuit
L
=22.8Ω, DAC → HPL/HPR pins, DATT=0dB
HPL/HPR pin
- 12 -
C1
0.025
1.54
2.47
0.25
0.67
min
47µF
0.4
60
80
70
20
50
82
8
-
-
-
-
-
-
-
-
> 6.8Ω
C2
1.92
3.09
4.38
1.98
0.05
1.34
typ
0.1
0.5
0.8
70
90
85
64
20
60
90
-
-
-
-
-
16Ω
0.075
2.30
3.71
0.75
2.01
max
300
0.5
1.2
30
30
-
-
-
-
-
-
-
-
-
-
-
[AK4640]
2004/03
dBFS
Units
Vpp
Vpp
Vpp
Vpp
Vpp
Vpp
Vpp
Vpp
dB
dB
dB
dB
dB
dB
dB
pF
pF
pF
Ω
Ω