AK4562 Datasheet, PDF (6/29 Pages) Asahi Kasei Microsystems – LOW POWER 20BIT CODEC WITH PGA

ASAHI KASEI
[AK4562]
ANALOG CHARACTERISTICS
(Ta=25°C; VA, VD, VT=2.5V; fs=44.1kHz; Signal Frequency=1kHz; Measurement frequency=10Hz ∼ 20kHz;
unless otherwise specified)
Parameter
min
typ
max
Resolution
20
Input PGA Characteristics (IPGA):
Input Voltage (LIN1, LIN2, RIN1, RIN2) (Note 5)
1.35
1.5
1.65
Input Impedance
6.3
9
15.0
Step Width
+28dB ∼ -8dB
-8dB ∼ -16dB
0.1
0.5
1
0.1
1
2
-16dB ∼ -32dB
-32dB ∼ -40dB
-40dB ∼ -52dB
0.1
2
4
-
2
-
-
4
-
ADC Analog Input Characteristics: (Note 6)
S/(N+D)
(-0.5dBFS Input)
74
82
D-Range
(EIAJ)
82
88
S/N
(EIAJ)
82
88
Interchannel Isolation
90
100
Interchannel Gain Mismatch
0.2
0.5
DAC Analog Output Characteristics: Measured at LOUT1/ROUT1 (Note 7)
S/(N+D)
78
86
D-Range
(EIAJ)
87
93
S/N
(EIAJ)
87
93
Interchannel Isolation
90
100
Interchannel Gain Mismatch
0.2
0.5
Output Voltage
1.35
1.5
1.65
Load Resistance
10
Load Capacitance
20
Output PGA Characteristics (OPGA):
S/(N+D)
(Note 8)
82
92
S/N
(EIAJ)
(Note 8)
89
95
Noise level at Mute
(EIAJ)
(Note 9)
-
108
-
Input Voltage
(Note 10)
1.5
1.65
Output Voltage
(Note 10)
1.5
1.65
Input Impedance
30
50
80
Load Resistance
10
Load Capacitance
20
Step Width
+0dB ∼ -34dB
0.1
1
2
-34dB ∼ -64dB
-64dB ∼ -78dB
0.1
2
4
-
2
-
Units
bits
Vpp
kΩ
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
Vpp
kΩ
pF
dB
dB
dB
Vpp
Vpp
kΩ
kΩ
pF
dB
dB
dB
Note : 5. Analog input voltage (full-scale voltage: IPGA = 0dB) scale with VREF. (IPGA = ADC = 0.6 x VREF.)
Note : 6. ADC is input from LIN1/RIN1 or LIN2/RIN2 and it measures included in IPGA. The value of IPGA is set 0dB.
Internal HPF cancels the offset of IPGA and ADC.
Note : 7. Analog output voltage scale with VREF. (DAC = 0.6 x VREF.)
Note : 8. Input: OPGAL/OPGAR; Output: LOUT2/ROUT2; OPGA = 0dB.
Note : 9. Noise level when reference voltage is 1.5Vpp.
Note : 10. Analog input/output voltage scale with VREF. (OPGA = 0.6 x VREF.)
MS0031-E-00
-6-
2000/05