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AK4688EN Datasheet, PDF (21/36 Pages) Asahi Kasei Microsystems – Asynchronous Stereo CODEC with Capless Line I/O | |||
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[AK4688]
â ÎÏϩάà³à¥à¾ (LIN/RIN, LOUT/ROUT pins)
ã¢ããã°å
¥åºåã¯å
èµã®ãã£ã¼ã¸ãã³ãåè·¯ã§çæããè² é»æºã§åä½ãã¾ããåºåã¯AVSS2 (0V)ãä¸å¿ã«ã·
ã³ã°ã«ã¨ã³ãã«ãªã£ã¦ãããDCã«ããç¨ã®ã³ã³ãã³ãµã¯ä¸è¦ã§ããè² è·æµæã¯5kΩ (min)ã§ããDACã«0dBFS
å
¥åæã®åºåé»å§ã¯2Vrms (typ)ã§ãã
â ιÏÏÏÏ¡ÊÏػೳ
DACã«ã¤ãã¦ãã½ãããã¥ã¼ãã¯ãã£ã¸ã¿ã«çã«å®è¡ããã¾ããSMUTE bitã â1âã«ããã¨Normal Speed Mode
ã®å ´å1024LRCKãµã¤ã¯ã«ã§å
¥åãã¼ã¿ã-â (â0â)ã¾ã§ã¢ããã¼ã·ã§ã³ããã¾ããSMUTE bitãâ0âã«ããã¨ã
-âç¶æ
ã解é¤ããã-âãã1024LRCKãµã¤ã¯ã«ã§0dBã¾ã§å¾©å¸°ãã¾ããã½ãããã¥ã¼ãéå§å¾ã1024LRCKãµ
ã¤ã¯ã«ä»¥å
ã«è§£é¤ãããã¨ã¢ããã¼ã·ã§ã³ãä¸æãããåããµã¤ã¯ã«ã§0dBã¾ã§å¾©å¸°ãã¾ããã½ãããã¥ã¼ã
æ©è½ã¯ä¿¡å·ãæ¢ããã«ä¿¡å·æºãåãæ¿ããå ´åãªã©ã«æå¹ã§ãã
SMUTE bit
0dB
Attenuation
1024/fs
(1)
1024/fs
(3)
-â
GD
GD
(2)
LOUT/ROUT
注:
(1) Normal Speed Mode ã®å ´åã1024LRCKãµã¤ã¯ã«(1024/fs)ã§å
¥åãã¼ã¿ã-â(â0â)ã¾ã§ã¢ããã¼ã·ã§ã³ã
ãã¾ãã
Double Speed Modeã®å ´åã2048LRCKãµã¤ã¯ã«(2048/fs)ãQuad Speed Modeã®å ´åã4096LRCKãµã¤ã¯ã«
(4096/fs)ãã§å
¥åãã¼ã¿ã-â (â0â)ã¾ã§ã¢ããã¼ã·ã§ã³ããã¾ãã
(2) ãã£ã¸ã¿ã«å
¥åã«å¯¾ãã¦ã¢ããã°åºåã¯ç¾¤é
延(GD)ãæã¡ã¾ãã
(3) ã½ãããã¥ã¼ãéå§å¾ã1024LRCKãµã¤ã¯ã«ä»¥å
ï¼Normal Speed Mode ã®å ´åï¼ã«è§£é¤ãããã¨ã¢ãã
ã¼ã·ã§ã³ãä¸æãããåããµã¤ã¯ã«ã§0dBã¾ã§å¾©å¸°ãã¾ãã
Figure 10. ã½ãããã¥ã¼ãæ©è½
â γεÏÏϦηοÏ
PDN1 pin = PDN2 pin = âLâã®ç¶æ
ã§é»æºãæå
¥ãã¦ãã ãããå
¨ã¦ã®é»æº (DVDD, AVDD1, AVDD2)ãç«ã¡ä¸
ãã£ãå¾ãPDN1 pin 㨠PDN2 pin ã âLâ â âHâã«ãã¦ä¸ããããªã»ãã解é¤å¾ (PDN1 pin = âLâ â âHâ ã㤠PDN2
pin= âLâ â âHâ)ãå
¨ã¦ã®ãããã¯ã¯ãã¯ã¼ãã¦ã³ç¶æ
ã§ç«ã¡ä¸ããã¾ããPDN1 pin ã¨PDN2 pinã§ãªã»ããã
ããªãéããã³ã³ããã¼ã«ã¬ã¸ã¹ã¿ã®å
容ã¯ä¿æããã¦ãã¾ããPDN1 pin ãâLâã«ãªãã¨ãADCå
é¨åè·¯ã
ãªã»ãããããADCç¨ã³ã³ããã¼ã«ã¬ã¸ã¹ã¿(Addr: 01h â 02h)ããã³PWAD bitããªã»ããããã¾ããPDN2 pin
ãâLâã«ãªãã¨ãDACå
é¨åè·¯ããªã»ãããããDACç¨ã³ã³ããã¼ã«ã¬ã¸ã¹ã¿(Addr: 03h) ããã³PWDA bitã
ãªã»ããããã¾ããPDN1 pinã¨PDN2 pin ã両æ¹âLâã«ãªãã¨ããã¹ã¦ã®å
é¨åè·¯ããã³ã³ã³ããã¼ã«ã¬ã¸ã¹
ã¿ããªã»ããããããã£ã¼ã¸ãã³ãããã¯ã¼ãã¦ã³ãã¾ããH/Wã³ã³ããã¼ã«æã®ã¬ã¸ã¹ã¿ã¯ç¡è¦ããPDN1
pinãPDN2 pinã§ãã¯ã¼ãã¦ã³ã³ã³ããã¼ã«ãå¯è½ã¨ãªãã¾ãã
MS1420-J-00
- 21 -
2012/05
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