ak4644 AKM Semiconductor, Inc., ak4644 Datasheet - Page 9

• Manufacturer Part Number: ak4644
• Description: Stereo Codec With Mic/hp/rcv-amp
• Manufacturer: AKM Semiconductor, Inc.

ASAHI KASEI
Parameter
Headphone-Amp Characteristics: DAC → HPL/HPR pins, ALC=OFF, IVOL=0dB, DVOL=0dB
Output Voltage (Note 15)
S/(N+D)
S/N (A-weighted)
Interchannel Isolation
Interchannel Gain Mismatch
Load Resistance
Load Capacitance
Mono Input: MIN pin (AIN3 bit = “0”; External Input Resistance=20kΩ)
Maximum Input Voltage (Note 18)
Gain (Note 19)
Note 15. Output voltage is proportional to AVDD voltage.
Note 16. HPG bit = “0”, HVDD=3.3V, R
Note 17. HPG bit = “1”, HVDD=5V, R
Note 18. Maximum voltage is in proportion to both AVDD and external input resistance (Rin). Vin = 0.6 x AVDD x Rin
Note 19. The gain is in inverse proportion to external input resistance.
MS0477-E-01
HPG bit = “0”, 0dBFS, HVDD=3.3V, R
HPG bit = “1”, 0dBFS, HVDD=5V, R
HPG bit = “1”, 0dBFS, HVDD=3.3V, R
HPG bit = “1”, 0dBFS, HVDD=5V, R
HPG bit = “0”, −3dBFS, HVDD=3.3V, R
HPG bit = “1”, −3dBFS, HVDD=5V, R
HPG bit = “1”, 0dBFS, HVDD=3.3V, R
HPG bit = “1”, 0dBFS, HVDD=5V, R
MIN
MIN
/ 20kΩ (typ).
Vout = 0.6 x AVDD(typ)@HPG bit = “0”, 0.91 x AVDD(typ)@HPG bit = “1”.
(Note 16), PMAINL2/R2/L3/R3 bits = “1”
(Note 16), PMAINL2/R2/L3/R3 bits = “0”
(Note 17)
LOUT/ROUT
HPL/HPR
LOVL bit = “0”
LOVL bit = “1”
HPG bit = “0”
HPG bit = “1”
L
L
HP-Amp
=16Ω (Po=70mW)
=16Ω (Po=70mW)
C1 in Figure 2
C2 in Figure 2
L
L
=16Ω (Po=62mW)
=16Ω (Po=62mW)
L
Figure 2. Headphone-Amp output circuit
=100Ω.
L
L
(Note 16)
(Note 17)
(Note 16)
(Note 17)
=100Ω
=22.8Ω.
L
L
=100Ω
=22.8Ω
L
=22.8Ω
HPL/HPR pin
- 9 -
C1
−24.5
−4.5
1.58
2.40
min
60
80
65
16
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
10Ω
0.22µF
47µF
6.8Ω
Measurement Point
−16.4
1.98
3.00
1.06
1.98
−20
typ
1.0
0.1
0.1
+2
70
80
20
70
90
90
75
75
80
0
-
-
-
C2
16Ω
−15.5
2.38
3.60
+4.5
max
300
0.8
0.8
30
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
[AK4644]
2006/10
dBFS
dBFS
dBFS
dBFS
Units
Vrms
Vrms
Vpp
Vpp
Vpp
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
pF
pF
Ω