ASAHI KASEI
[AK4122]
SRC CHARACTERISTICS
(Ta=25°C; AVDD=DVDD=3.3V; AVSS=BVSS=DVSS=0V; data = 24bit; measurement bandwidth = 20Hz ~ FSO/2;
unless otherwise specified.)
Parameter
Symbol
min
typ
max
Units
SRC Characteristics:
Resolution
Input Sample Rate
Output Sample Rate
(Note 4)
24
96
96
Bits
kHz
kHz
FSI
FSO
8
32
THD+N
(Input = 1kHz, 0dBFS, Note 5)
FSO/FSI = 44.1kHz/48kHz
FSO/FSI = 48kHz/44.1kHz
FSO/FSI = 32kHz/48kHz
FSO/FSI = 96kHz/32kHz
-
-
-
-
-
−113
−113
−114
−111
-
-
-
-
-
dB
dB
dB
dB
dB
Worst Case (FSO/FSI = 48kHz/8kHz)
−103
Dynamic Range (Input = 1kHz, −60dBFS, Note 5)
FSO/FSI = 44.1kHz/48kHz
-
-
-
114
115
115
116
-
-
-
-
-
-
dB
dB
dB
dB
dB
FSO/FSI = 48kHz/44.1kHz
FSO/FSI = 32kHz/48kHz
FSO/FSI = 96kHz/32kHz
-
Worst Case (FSO/FSI = 32kHz/44.1kHz)
Dynamic Range (Input = 1kHz, −60dBFS, A-weighted, Note 5)
FSO/FSI = 44.1kHz/48kHz
112
-
117
-
6
dB
-
Ratio between Input and Output Sample Rate
(Note 6) FSO/FSI
0.33
Note 4. Input data for SRC corresponds to 24bit data. When LSB 4bit data is input, the AK4122 calculates as “0” data
because SRC is 20bit calculation. Therefore, SRC outputs “0” data.
Note 5. Measured by ROHDE & SCHWARZ UPD04, Rejection Filter = wide, 8192point FFT.
Note 6. The “0.33” is the ratio of FSO/FSI when FSI is 96kHz and FSO is 32kHz. The “6” is the ratio of FSO/FSI
when FSI is 8kHz and FSO is 48kHz.
S/PDIF RECEIVER CHARACTERISTICS
(Ta=25°C; AVDD, DVDD=3.0 ∼ 3.6V)
Parameter
Symbol
Zin
min
-
typ
max
Units
kΩ
mVpp
kHz
Input Resistance
Input Voltage
10
-
VTH
fs
200
32
Input Sample Frequency
-
96
MS0267-E-02
2004/07
- 8 -
AKM [ ASAHI KASEI MICROSYSTEMS ]
