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AK4688EN Datasheet, PDF (23/36 Pages) Asahi Kasei Microsystems – Asynchronous Stereo CODEC with Capless Line I/O | |||
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[AK4688]
注ï¼
(1) é»æºç«ã¡ä¸ãå¾ãPDN1 pin, PDN2 pin ã âLâÃâHâã«ãã¦ã ããã
ãã®å ´åãAK4688ããªã»ããããããã150ns以ä¸ã®âLâåºéãå¿
è¦ã§ãã
PDN1 pin = PDN2 pin = âLâã®ç¶æ
ã§é»æºãæå
¥ãã¦ãã ããããã¹ã¦ã®é»æº(DVDD, AVDD1/2)ãç«ã¡
ä¸ãã£ãå¾ãPDN1 pin, PDN2 pin ãâHâã«ãã¦ãã ããã
(2) ãã£ã¼ã¸ãã³ãåè·¯ã®ãã¯ã¼ã¢ãã:
PDN1 pinãâLâ Ã âHâ ã«ãã MCLK1, BICK1, LRCK1 ãå
¥åããããPDN2 pinãâLâ à âHâã«ãã
MCLK2, BICK2, LRCK2ãå
¥åããã¨CVEE pin ã¯ãç´1.3msec@48kHz(typ)ã®æéã§CVEEé»å§ã«ãªã
ã¾ãã
注:Charge-Pumpåè·¯ãç«ã¡ä¸ãã£ã¦ããéPWAD, PWDA bit ã â1âã«è¨å®ãããå ´åãã¾ãã¯
PDN1pinãPDN2 pin ã âHâã«è¨å®ãããå ´åãADC, DACã¯Charge-Pumpåè·¯ãç«ã¡ä¸ãã£ãå¾ã
åæåããã¾ãã
(3) ADCã¯ãã¯ã¼ãã¦ã³è§£é¤å¾ãADC ã¢ããã°é¨ãåæåããã¾ããtimeA=528/fs
(4) DACã¯ãã¯ã¼ãã¦ã³è§£é¤å¾ãDAC ã¢ããã°é¨ãåæåããã¾ãã
VREF pinã«1μFãè£
çããã¨ãã«timeBã¯ä»¥ä¸ã®ããã«ãªãã¾ãã
timeBï¼6/fsÃ8Ã2 : Normal speed mode
timeBï¼12/fsÃ8Ã2 : Double speed mode
timeBï¼24/fsÃ8Ã2 : Quadruple speed mode
timeBãå®äºããã¨ãD/Aå
¥åå¯è½ã«ãªãã¾ãã
(5) ã¢ããã°å
¥åã«å¯¾ãããã£ã¸ã¿ã«åºåããã£ã¸ã¿ã«å
¥åã«å¯¾ããã¢ããã°åºåã¯ç¾¤é
延(GD)ããã¡ã¾
ãã
(6) ãã¯ã¼ãã¦ã³æADCåºå㯠â0â ãã¼ã¿ã§ãã
(7)ãã£ã¼ã¸ãã³ãåè·¯ã®ãã¯ã¼ãã¦ã³:
(PDN1 pin = âHâ Ã âLâ or MCLK1, BICK1, LRCK1ç¡å
¥å) ã㤠(PDN2 pin = âHâ à âLâ or MCLK2, BICK2,
LRCK2ç¡å
¥å)
CVEE pinã¯ãå¤ä»ãã³ã³ãã³ãµã¨å
é¨ã®æµæå¤ã«å¾ã£ã¦0Vã«ãªãã¾ããå
é¨ã®æµæå¤ã¯ã50kâ¦ã§ãã
å¾ã£ã¦CVEE pin ã®å¤ä»ãã³ã³ãã³ãµã1µFã®æãæå®æ°ã¯50msec (typ)ã«ãªãã¾ãã
(8)ãã£ã¼ã¸ãã³ããç«ã¡ä¸ãã£ãå¾2048/fsã®éå¾
ã¡ã¾ãã
(9)ADC/DACãã¯ã¼ãã¦ã³è§£é¤å¾VREFãç«ã¡ä¸ããã¾ã§ç´5msec (typ) ãããã¾ãã
MS1420-J-00
- 23 -
2012/05
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