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AK4679EG Datasheet, PDF (16/220 Pages) Asahi Kasei Microsystems – 24bit Stereo CODEC with DSP and MIC/RCV/HP/SPK/LINE-AMP
◁
[AK4679]
Parameter
min
typ
max
Unit
Headphone-Amp Characteristics: DAC(Stereo, Note 22) → HPL/HPR pins, ALC=OFF, IVOL=0dB, OVOL=0dB,
HPG=0dB, RL=32Ω
Output Voltage (Note 24)
0dBFS, RL = 32Ω, HPG=−4dB
0dBFS, RL = 16Ω, HPG=−4dB
0dBFS, RL = 32Ω, HPG=0dB
0dBFS, RL = 16Ω, HPG=0dB
S/(N+D)
1.44
1.6
-
1.6
-
2.5
-
0.85
1.76
Vpp
-
Vpp
-
Vpp
-
Vrms
0dBFS, RL = 32Ω, HPG=−4dB
0dBFS, RL = 16Ω, HPG=−4dB
0dBFS, RL = 32Ω HPG=0dB
0dBFS, RL = 16Ω HPG=0dB
S/N (A-weighted)
50
73
-
67
-
73
-
20
85
95
-
dB
-
dB
-
dB
-
dB
-
dB
Output Noise Level (A-weighted, HPG=−14dB)
-
−106
-
dBV
Interchannel Isolation
60
80
-
dB
Interchannel Gain Mismatch
-
0
0.8
dB
Load Resistance
16
32
-
Ω
Load Capacitance (Note 25)
-
-
300
pF
PSRR (Note 26)
217Hz
-
70
-
dB
1kHz
-
60
-
dB
DC-offset (HPG ≤ −4dB)
−1
0
1
mV
Speaker-Amp Characteristics: DAC(stereo, Note 27) → SPP/SPN pins, ALC=OFF, IVOL=0dB, OVOL=0dB,
SPKG=−6dB, RL=8Ω + 10μH
Output Power
SVDD=5.0V, THD+N = 10%
-
1.57
-
W
SVDD=4.2V, THD+N = 10%
-
1.1
-
W
SVDD=4.2V, THD+N = 1%
-
0.89
-
W
SVDD=3.7V, THD+N = 1%
-
0.69
-
W
Output Voltage (−3dBFS) (Note 28)
5.0
5.4
6.2
Vpp
S/(N+D) (SVDD=3.7V, Po=0.35W)
40
59
-
dB
Output Noise Level (A-weighted) (Note 29)
-
−82
−73
dBV
Load Resistance
8
-
-
Ω
Load Capacitance (Note 25)
-
-
300
pF
PSRR (Note 30)
217Hz
-
63
-
dB
1kHz
-
63
-
dB
DC-offset
−10
0
10
mV
Current Limit (Note 31)
-
40
80
mA
Note 24. The Output voltage is proportional to AVDD voltage. Vout = 1.4 x AVDD Vpp(typ).
Po = 10mW @ 32Ω, Vout = 1.6Vpp. Po = 25mW @ 32Ω, Vout = 2.5Vpp.
Po = 20mW @ 16Ω, Vout = 1.6Vpp. Po = 45mW @ 16Ω, Vout = 0.85Vrms.
Note 25. Load Capacitance for VSS1.
Note 26. PSRR is referred to PVDD with 200mVpp sine wave.
Note 27. Input signal of left and right channels is same phase and level.
Note 28. Output voltage is proportional to AVDD voltage. Vout = (SPP) – (SPN) = 3.0 x AVDD Vpp(typ).
Note 29. In case of mono signal input (e.g. Lch only) and SPKG=0dB, output noise level is -84dBV.
Note 30. PSRR is referred to SVDD with 200mVpp sine wave.
Note 31. The average current between SVDD and VSS3 when the SPP and SPN pins are shorted and output power is
890mW.
MS1402-E-06
- 16 -
2013/02
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