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AK4616VQ Datasheet, PDF (29/46 Pages) Asahi Kasei Microsystems – 24bit 3ch/5ch Audio CODEC with Mic Amplifier | |||
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[AK4616]
â ãã¯ã¼ãã¦ã³æ©è½
AK4616ã®ADCã¨DACã¯ãã¯ã¼ãã¦ã³ãã³(PDN pin)ã âLâ ã«ãããã¨ã§ãã¯ã¼ãã¦ã³ã§ãããã®ã¨ãåæã«
åãã£ã¸ã¿ã«ãã£ã«ã¿ããªã»ããããã¾ããPDN = âLâã§å
é¨ã¬ã¸ã¹ã¿å¤ã¯åæåããã¾ãããã¯ã¼ãã¦ã³ã¢
ã¼ãæãSDTO1-2 pins㯠âLâ ã«ãªããã¢ããã°åºåã¯Hi-Zãåºåãã¾ãããã®ãªã»ããã¯é»æºæå
¥æã«å¿
ã
ä¸åº¦è¡ã£ã¦ä¸ãããADCã®å ´åãå
é¨ãã¯ã¼ãã¦ã³ã¢ã¼ãã解é¤ãããã¨3ï½4/fså¾ãåæåãµã¤ã¯ã«(1056/fs)
ãéå§ããã¾ãããã®ãããåºåãã¼ã¿SDTO1-2ã¯1059~1060 x LRCKãµã¤ã¯ã«å¾ç¢ºå®ãã¾ããDACã®å ´åã
å
é¨ãã¯ã¼ãã¦ã³ã¢ã¼ãã解é¤ãããã¨3ï½4/fså¾ãåæåãµã¤ã¯ã«(516/fs)ãéå§ããã¾ããåæåä¸ãã¢ã
ãã°åºåã¯Hi-Zãåºåãã¾ããFigure 26ã«ãã¯ã¼ãã¦ã³åã³ãã¯ã¼ã¢ããæã®ã·ã¼ã±ã³ã¹ä¾ã示ãã¾ãã
DACIN bit = â1âã®æãDACã¯1059~1060 x LRCKãµã¤ã¯ã«å¾æå¹ã«ãªãã¾ãã
A3V31, A3V32
D3V3, D1V8
PDN
(10)
Internal PDN
(11)
ADC Internal
State
DAC Internal
State
(9)
3~4/fs
(1)
1059/fs
Init Cycle
516/fs (2)
Init Cycle
ADC In
(Analog)
ADC Out
â0âdata (4)
(6)
(Digital)
DAC In
(Digital)
â0âdata
DAC Out
(5)
(Analog)
Clock In
Donât care
MCLK,LRCK,SCLK
External
Mute
(7)
Mute ON (8)
Normal Operation
Power-down
Normal Operation
Power-down
GD (3)
GD
GD(3)
â0âdata
â0âdata
GD
(7)
Donât care
Mute ON
注ï¼
(1) ADCã¯å
é¨ãã¯ã¼ãã¦ã³è§£é¤å¾ãã¢ããã°é¨ãåæåããã¾ãã
ã¹ã¿ã¼ãã¢ããæã®ADCã¸ã®å
¥åé»å§ã¯åä½ç¶æ
ã®ã³ã¢ã³é»å§ãå
¥åãã¦ãã ããã
ã¢ããã°å
¥åã«ããã¦HPFã®ç«ã¡ä¸ããæéãå¾
ã¤å¿
è¦ãããã¾ãã
å¤ä»ãã®ã³ã³ãã³ãµã1uFÍ·à£Éºà³à¾ã¤ã³ãã¼ãã³ã¹ ã¯60kâ¦(typ)ÉºÏ = 0.06 sec. ʹͳÎÎ͢ɻ
(2) DACã¯å
é¨ãã¯ã¼ãã¦ã³è§£é¤å¾ãã¢ããã°é¨ãåæåããã¾ãã
(3) ã¢ããã°å
¥åã«å¯¾ãããã£ã¸ã¿ã«åºåããã£ã¸ã¿ã«å
¥åã«å¯¾ããã¢ããã°åºåã¯ç¾¤é
延ããã¡ã¾ãã
(4) ãã¯ã¼ãã¦ã³æADCåºå㯠â0â ãã¼ã¿ã§ãã
(5) ãã¯ã¼ãã¦ã³æDACåºåã¯Hi-Zã§ãã
(6) ã¢ããã°é¨ã®åæåçµäºæADCåºåã«ç°é³ãåºåããã¾ããç°é³ãåé¡ã«ãªãå ´åã¯ãã£ã¸ã¿ã«åºåã
ãã¥ã¼ããã¦ä¸ããã
(7) å
é¨ãã¯ã¼ãã¦ã³ã®ç«ã¡ä¸ããã¨ãã¸ãåã³å
é¨ãã¯ã¼ãã¦ã³ã®ç«ã¡ä¸ããã¨ãã¸ã®519â¼520/fså¾ã§ç°
é³ãåºåããã¾ãã
(8) ç°é³(7)ãåé¡ã«ãªãå ´åã¯ã¢ããã°åºåãå¤é¨ã§ãã¥ã¼ããã¦ä¸ããã
(9) å
é¨ãã¯ã¼ãã¦ã³ãç«ã¡ä¸ãã£ã¦ããåæåãµã¤ã¯ã«ãéå§ããã¾ã§3â¼4/fsãããã¾ãã
(10) PDN pin = âLâã®ç¶æ
ã§é»æºãæå
¥ãããã¹ã¦ã®é»æºãç«ã¡ä¸ãã£ãå¾ãPDN pinãâHâã«ãã¦ãã ããã
(11) ããã¼ã³ãã³ãã®å
¥åå¾ã«å
é¨ãã¯ã¼ãã¦ã³ã¯è§£é¤ããã¾ãã
Figure 26. ãã³ãã¯ã¼ãã¦ã³ï¼ãã³ãã¯ã¼ã¢ããã·ã¼ã±ã³ã¹ä¾
MS1437-J-01
- 29 -
2012/11
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