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AK4414EQ Datasheet, PDF (31/51 Pages) Asahi Kasei Microsystems – High Performance 120dB 32-Bit 4ch DAC | |||
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[AK4414]
â ãã£ã¨ã³ãã¡ã·ã¹ãã£ã«ã¿
IIRãã£ã«ã¿ã«ãã3å¨æ³¢æ°(32kHz, 44.1kHz, 48kHz)対å¿ã®ãã£ã¨ã³ãã¡ã·ã¹ãã£ã«ã¿(50/15μsç¹æ§)ãå
èµãã¦
ãããDEM1-0 pins ã¾ãã¯DEM1-0 bits ã§ã³ã³ããã¼ã«ããã¾ãã256fs/384fs ã¨128fs/192fs ã®æã«ã¯ãã£ã¨ã³
ãã¡ã·ã¹ãã£ã«ã¿ã¯OFFã§ããDSD mode ã§ã¯DEM1-0 bits ã¯ç¡å¹ã§ãããã£ã¨ã³ãã¡ã·ã¹ãã£ã«ã¿ã®è¨å®å¤
ã¯PCM modeã¨DSD mode ãåãæ¿ãã¦ãä¿æããã¾ãã
[1] Parallel Mode
Parallel Modeã§ã¯DAC1ã¨DAC2ã®ãã£ã¨ã³ãã¡ã·ã¹ãã£ã«ã¿ã®ã¢ã¼ããDEM1 pin ã¨DEM2 pinã§å¶å¾¡ãã¾ãã
ãã£ã¨ã³ãã¡ã·ã¹ãã£ã«ã¿ã®è¨å®ã¯DAC1ã¨DAC2ã§å
±éã§å¥ã
ã«ã¯è¨å®ã§ãã¾ããã
DEM1 DEM0
Mode
L
L
44.1kHz
L
H
OFF (default)
H
L
48kHz
H
H
32kHz
Table 18. De-emphasis Control (Parallel Mode)
[2] Serial Mode
DEM1-0 bits 㨠DEM3-2 bits ã§DAC1ã¨DAC2ã®ãã£ã¨ã³ãã¡ã·ã¹ãã£ã«ã¿ã®ã¢ã¼ããããããå¶å¾¡ãã¾ãã
DSD mode ã§ã¯DEM3-0 bits ã¯ç¡å¹ã§ãããã£ã¨ã³ãã¡ã·ã¹ãã£ã«ã¿ã®è¨å®å¤ã¯PCM modeã¨DSD mode ãåã
æ¿ãã¦ãä¿æããã¾ãã
DEM1 DEM0
Mode
0
0
44.1kHz
0
1
OFF (default)
1
0
48kHz
1
1
32kHz
Table 19. DAC1 ãã£ã¨ã³ãã¡ã·ã¹ãã£ã«ã¿å¶å¾¡ (Serial Mode)
DEM3 DEM2
Mode
0
0
44.1kHz
0
1
OFF (default)
1
0
48kHz
1
1
32kHz
Table 20. DAC2 ãã£ã¨ã³ãã¡ã·ã¹ãã£ã«ã¿å¶å¾¡ (Serial Mode)
â åºåããªã¥ã¼ã
AK4414ã¯MUTEãå«ã0.5dBã¹ãããã255ã¬ãã«ã®ãã£ãã«ç¬ç«ãã£ã¸ã¿ã«åºåããªã¥ã¼ã (ATT)ãå
èµã
ã¦ãã¾ãããã®ããªã¥ã¼ã ã¯DACã®å段ã«ãããå
¥åãã¼ã¿ã0dBããâ127dBã¾ã§ã¢ããã¼ã·ã§ã³ãã¾ãã¯
ãã¥ã¼ããã¾ããè¨å®å¤éã®é·ç§»ã¯ã½ããé·ç§»ã§ããå¾ã£ã¦ãé·ç§»ä¸ã«ã¹ã¤ããã³ã°ãã¤ãºã¯çºçãã¾ãã
FFH (0dB)ãã00H (Mute)ã¾ã§ã®é·ç§»æéã¯7424/fsã«ãªãã¾ããPDN pinã âLâ ã«ããã¨ãã¢ããã¼ã·ã§ã³ã¬
ãã«ã¯FFH (0dB)ã«åæåããã¾ããRSTN bitã â0â ã«ããã¨ã¢ããã¼ã·ã§ã³ã¬ãã«ã¯ä¸æ¦FFHã«ãªããRSTN
bitã â1â ã«æ»ãã¨è¨å®å¤ã«æ»ã£ã¦ããã¾ãã
Sampling Speed
Transition Time
0dB to MUTE
fs=44.1kHz
168.3ms
fs=96kHz
77.3ms
fs=192kHz
38.6ms
Table 21. ATTé·ç§»æé
MS1476-J-00
- 31 -
2013/01
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