AK4564 Datasheet, PDF (8/48 Pages) Asahi Kasei Microsystems – 16BIT CODEC WITH BUILT-IN ALC AND MIC/HP/SPK-AMP

ASAHI KASEI
[AK4564]
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Parameter
min
typ
max
Units
DAC Analog Output characteristics: Measured via LOUT1/ROUT1, LOUT2/ROUT2, VOL=+6.5dB
Resolution
16
bits
S/(N+D) (0dBFS)
76
82
dB
DR (-60dBFS, A-Weighted)
82
88
dB
S/N (A-Weighted)
82
88
dB
Output Voltage (Note 19)
+1.2
+2
+2.8
dBV
Interchannel Isolation
80
100
dB
Interchannel Gain Mismatch
0.5
dB
Load Resistance
10
kΩ
Load Capacitance (Note 13)
Headphone-Amp Characteristics: DAC à HPL/HPR pin
30
pF
Output Voltage (Note 20) HVDD = 3V
-5.5
-4.7
-3.9
dBV
(Note 21) HVDD = 4.5V
-1.1
-0.3
+0.5
dBV
S/(N+D) (Note 20) HVDD = 3V
50
70
dB
(Note 21) HVDD = 4.5V
50
66
dB
Output Noise Voltage (A-Weighted);
HPG=“0”, HVDD=3V, RL=32Ω
-92
-86
dBV
HPG=“1”, HVDD=4.5V, RL=100Ω
-77
-71
dBV
Interchannel Isolation; HPG=“0”, HVDD=3V, RL=32Ω
60
80
dB
HPG=“1”, HVDD=4.5V, RL=100Ω
60
80
dB
Interchannel Gain Mismatch; HPG=“0”, HVDD=3V, RL=32Ω
0.5
dB
HPG=“1”, HVDD=4.5V, RL=100Ω
0.5
dB
Load Resistance; HVDD=2.6∼3.6V, HPG = “0”
22
Ω
HVDD=4.0∼5.5V, HPG = “1”
100
Ω
Load Capacitance (C1 in Figure 2)
30
pF
(C2 in Figure 2)
Speaker-Amp Characteristics: RL = 8Ω, BTL, MIN à SP0/SP1, ALC2 = OFF
6.8
nF
Output Voltage (-6.5dBV Input)
-4
-2
0
dBV
S/(N+D) (-2dBV Output)
30
60
dB
S/N (A-Weighted)
81
89
dB
Load Resistance
8
Ω
Load Capacitance
10
pF
Note 19. Output voltages are proportional to AVDD voltage.
LOUT1, ROUT1, LOUT2, ROUT2 = (1.27 x AVDD) Vpp @VOL = +6.5dB
Note 20. When DAC = 0dBFS Output, OATT = 0dB, HPG = “0”, RL = 32Ω, the output voltage is (0.59 x AVDD) Vpp.
Note 21. When DAC = -12dBFS Output, OATT = 0dB, HPG = “1”, RL = 100Ω, the output voltage is (0.98 x AVDD)
Vpp.
HP-Amp
HPL, HPR
-
16Ω
+
+
0.1µ
C1
C2
16Ω
10Ω
* 0dBV = 1Vrms = 2.83Vpp
MS0140-E-01
Oscillation prevention circuit
Figure 2. Headphone-Amp Output Circuit
-8-
2002/07