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