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AK4688EN Datasheet, PDF (6/36 Pages) Asahi Kasei Microsystems – Asynchronous Stereo CODEC with Capless Line I/O | |||
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[AK4688]
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(Ta=25°C; AVDD1=AVDD2 = DVDD= 3.3V; AVSS1=AVSS2=DVSS =0V; fs=48kHz; BICK=64fs;
Signal Frequency=1kHz; 24bit Data; Measurement Frequency = 20Hzâ¼ 20kHz at fs=48kHz, 20Hz~40kHz at fs=96kHz;
20Hz~40kHz at fs=192kHz, all blocks are synchronized, unless otherwise specified)
Parameter
min
typ
max
Unit
Pre-Amp Characteristics:
Feedback Resistance Rf
Input Resistance Ri
12
39
92
kΩ
18
47
92
kΩ
Output Level LO / RO pins (ADC=0dBFs) (Note 3)
1.82
1.91
2.00
Vrms
Load Resistance RL
(Note 4)
18
kΩ
Load Capacitance CL
(Note 4)
20
pF
Analog Input (LIN, RINpin) to ADC Analog Input Characteristics
Resolution
S/(N+D)
(-1dBFS)
DR
(-60dBFS)
S/N
(input off)
fs=48kHz
fs=48kHz, A-weighted
fs=48kHz, A-weighted
24
Bits
-
83
dB
-
99
dB
-
99
dB
Interchannel Isolation
Interchannel Gain Mismatch
Gain Drift
(Note 5)
-
100
dB
0
-
dB
50
-
ppm/°C
Power Supply Rejection
(Note 6)
50
dB
DAC to Analog Output (LOUT, ROUT pin) Characteristics
Resolution
24
Bits
S/(N+D) (0dBFS)
fs=48kHz
-
95
dB
fs=96kHz
-
93
dB
fs=192kHz
-
93
dB
DR
(-60dBFS)
fs=48kHz, A-weighted
-
105
dB
fs=96kHz, A-weighted
-
105
dB
fs=192kHz, A-weighted
-
105
dB
S/N
(â0â data)
fs=48kHz, A-weighted
-
105
dB
fs=96kHz, A-weighted
-
105
dB
fs=192kHz, A-weighted
-
105
dB
Interchannel Isolation
-
100
dB
Interchannel Gain Mismatch
0
-
dB
DC Offset (at output pin)
Gain Drift
Output Voltage
LOUT/ROUT= 2 x AVDD2/3.3
â5
0
+5
mV
50
-
ppm/°C
1.85
2
2.15
Vrms
Load Resistance
Load Capacitance
Power Supply Rejection
(C1)
(Note 6)
5
kΩ
30
pF
62
dB
Note 3. å¤ä»ãã®å
¥åæµæã47kΩãFeedbackæµæã39kΩãå
¥åä¿¡å·ã2.3Vrmsã«ããå ´åã«ADCããã«ã¹ã±ã¼
ã«ã«ãªãå
¥åã¬ã³ã¸ã§ãã
Note 4. LO/RO pinããã®åºåä¿¡å·ãå¤é¨ã§ä½¿ç¨ããæã®è² è·ã®è¦å®ã§ããFigure 3ã®RL ããã³CL ã§ãã
Note 5. LIN ã¨RINéã®å
¨ã¦ã®ãã£ãã«éã¢ã¤ã½ã¬ã¼ã·ã§ã³ã§ãã
Note 6. AVDD1, AVDD2, DVDDã«1kHz, 50mVppã®æ£å¼¦æ³¢ãéç³ããå ´åã
MS1420-J-00
-6-
2012/05
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