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AK5388AEQ Datasheet, PDF (21/31 Pages) Asahi Kasei Microsystems – 120dB 24-bit 192kHz 4-Channel ADC | |||
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[AK5388A]
â ãã£ã¸ã¿ã«HPF
ADCã¯DCãªãã»ãããã£ã³ã»ã«ã®ããã«ãã£ã¸ã¿ã«HPFãå
èµãã¾ããHPFE pinã®è¨å®ã«ãããHPFã®
ON/OFFãå¶å¾¡ãããã¨ãã§ãã¾ããä½ããåä½ä¸ã«HPFã®ON/OFFè¨å®ãå¤æ´ããã¨ãDCãªãã»ããå¤ã®å¤
åã«ããã¯ãªãã¯é³çºçã®åå ã¨ãªãã¾ããè¨å®å¤æ´ã¯ãã¯ã¼ãã¦ã³(PDN pin = âLâ)æã«è¡ããã¨ãæ¨å¥¨ã
ã¾ãã
â ãªã¼ãããã¼æ¤åºæ©è½
AK5388Aã¯ã¢ããã°å
¥åã®ãªã¼ãããã¼æ¤åºæ©è½ãæã¡ã¾ããLchã¾ãã¯Rchã®ã¢ããã°å
¥åããªã¼ãããã¼
ããã¨(â0.3dBFS以ä¸)ãOVF pinãâHâã«ãªãã¾ãããªã¼ãããã¼ããã¢ããã°å
¥åã«å¯¾ããOVFåºåã¯ADC
ã¨åã群é
延(GD=13/fs=0.27ms@fs=48kHz)ãæã¡ã¾ãããã¯ã¼ãã¦ã³è§£é¤å¾(PDN pin = âLâ â âHâ)ã
516/fs(=10.75ms@fs=48kHz)ã®éOVF pinã¯âLâã§ããã®å¾ãªã¼ãããã¼æ¤åºæ©è½ãæå¹ã«ãªãã¾ãã
â ãã¯ã¼ãã¦ã³/ãªã»ãã
PDN pin ã âLâã«ããã¨AK5388Aã¯ãã¯ã¼ãã¦ã³ç¶æ
ã«ãªãããã®æãåæã«å
é¨ã®ãã£ã¸ã¿ã«ãã£ã«ã¿ã
ãªã»ããããã¾ãããã®ãªã»ããã¯é»æºæå
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ãä¸åº¦è¡ã£ã¦ä¸ããããã¯ã¼ãã¦ã³ç¶æ
ã®æãVCOMã¯
AGNDã®é»å§ã«ãªãã¾ãããã¯ã¼ãã¦ã³ã解é¤ãããå¾ã«ã¢ããã°é¨ã®åæåãµã¤ã¯ã«ãå§ã¾ãã¾ãããã®
ãããSDTOåºåã¯ãã¹ã¿ã¢ã¼ãæã«517 LRCK ãµã¤ã¯ã«å¾(ã¹ã¬ã¼ãã¢ã¼ãæã516 LRCK ãµã¤ã¯ã«)ã«ç¢ºå®
ãã¾ããåæåä¸ã¯ä¸¡ãã£ã³ãã«ã®ADCåºå㯠â0âã¨ãªãã¾ããåæåãµã¤ã¯ã«ãçµäºããå¾ãADCåºåã¯
å
¥åã«å¯¾å¿ããå¤ã«è½ã¡çãã¾ã(ADCåºåãè½ã¡çãã¾ã§ã«ã¯ç´ã群é
延(GD)ç¨åº¦ãããã¾ã)ã
é»æºæå
¥æãä¸åº¦PDN pinãâLâã«ãã¦ãªã»ãããã¦ä¸ããããã®å¾ãPDN pinãâHâã«ããã¨ãªã»ããåã³ã
ã¯ã¼ãã¦ã³ã¯MCLKã§è§£é¤ãããLRCKã®ç«ã¡ä¸ããã¨ãã¸(åºåãã©ã¼ããããMode 1ã®æã¯ç«ã¡ä¸ããã¨
ãã¸)ã«åæãã¦å
é¨ã®ã¿ã¤ãã³ã°ãåä½ãã¾ãã
(1)
PDN
Internal
State
A/D In
(Analog)
A/D Out
(Digital)
Normal Operation
GD (2)
Power-down
Idle Noise
(3)
â0âdata
Initialize
Normal Operation
GD
â0âdata
Idle Noise
Clock In
MCLK,LRCK,SCLK
(4)
Notes:
(1) ã¹ã¬ã¼ãã¢ã¼ãæã¯517/fsããã¹ã¿ã¢ã¼ãæ㯠516/fs ã§ãã
(2) ãã£ã¸ã¿ã«å
¥åã«å¯¾ãã¦ã¢ããã°åºåã¯ç¾¤é
延(GD)ãæã¡ã¾ãã
(3) ãã¯ã¼ãã¦ã³ç¶æ
æãA/D åºå㯠â0â ã§ãã
(4) å¤é¨ã¯ããã¯(MCLK, SCLK, LRCK)ãåæ¢ããæãAK5388Aã¯ãã¯ã¼ãã¦ã³ç¶æ
ã«ãã¦ãã ããã
Figure 16. ãã¯ã¼ãã¦ã³/ã¢ãã ã·ã¼ã±ã³ã¹
MS1494-J-02
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2013/05
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