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AK5388AEQ Datasheet, PDF (22/31 Pages) Asahi Kasei Microsystems – 120dB 24-bit 192kHz 4-Channel ADC | |||
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[AK5388A]
â TDM Mode æã®ã«ã¹ã±ã¼ãæ¥ç¶
TDM256 modeæã«ãAK5388Aã¯ãã¤ã¸ã¼ã»ãã§ã¤ã³å½¢æ
ã§æ大2å°ã¾ã§ã®ã«ã¹ã±ã¼ãæ¥ç¶ã«å¯¾å¿ãã¾ãããã®æãã
ãã¤ã¹#1ã®SDTO1 pin ã¯ããã¤ã¹#2ã®TDMIN pin ã«æ¥ç¶ãããããã¤ã¹#2ã®SDTO1 pinããããã¤ã¹#1ã®4ãã£
ãã«TDMãã¼ã¿ã¨ããã¤ã¹#2ã®4ãã£ãã«TDMãã¼ã¿ãæ¥ç¶ãã¦ã8ãã£ãã«TDMãã¼ã¿ã¨ãã¦åºåã§ãã¾
ããFigure 17ã«æ¥ç¶ä¾ã示ãã¾ãã
2ã¤ã®ããã¤ã¹ãã«ã¹ã±ã¼ãæ¥ç¶ãã¦ã¹ã¬ã¼ãã¢ã¼ãã§ä½¿ç¨ããå ´åãå
¥åãããMCLKã¨BICKã®ã¿ã¤ãã³ã°ã«ãã£ã¦
ã¯ããã¤ã¹#1ï½#4ã§å
é¨ã®åä½ã¿ã¤ãã³ã°ãMCLKã®1ã¯ããã¯åãããå¯è½æ§ãããã¾ãã
ããã¤ã¹éã§ä½ç¸ããããªããããã«ã¯ãTable 6ã«ç¤ºãããã«MCLKã®âã«å¯¾ãã¦BICKã®âã±10ns以ä¸ã¨ããã
ã¨ãæ¨å¥¨ãã¾ãã
ãã®ãã¿ã¤ãã³ã°ãå®ç¾ããããã«ã¯ãMCLK=2ÃBICKï¼é常é512fsã¢ã¼ãã2åéï¼ã®æã¯ãFigure 19ã«ç¤ºãããã«
MCLKã®âã§2åå¨ããBICKããMCLK=BICKï¼é常é256ã¢ã¼ãã4åéï¼ã®æã¯ãFigure 20ã«ç¤ºãããã«MCLKã¨
BICKãåç¸ã§å
¥åãããã¨ã§Table 6ã®ã¿ã¤ãã³ã°ãæºè¶³ãããã¨ãã§ãã¾ãã
AK5388A #1
MCLK
LRCK
BICK
TDMIN
SDTO1
SDTO2
GND
256fs or 512fs
48kHz
256fs
AK5388A #2
MCLK
LRCK
BICK
TDMIN
SDTO1
SDTO2
8ch TDM
Figure 17. TDMã«ã¹ã±ã¼ãæ¥ç¶å³
LRCK
256 BICK
BICK(256fs)
#1 SDTO1(o) 23 22 0 23 22 0 23 22 0 23 22 0
23 22
L1
R1
L2
R2
32 BICK 32 BICK 32 BICK 32 BICK
#1 SDTO2(o)
23 22 0 23 22 0 23 22 0 23 22 0
L1
32 BICK
R1
32 BICK
L2
32 BICK
R2
32 BICK
#2 TDMIN(i)
23 22 0 23 22 0 23 22 0 23 22 0
L1
32 BICK
R1
32 BICK
L2
32 BICK
R2
32 BICK
#2 SDTO1(o)
23 22 0 23 22 0 23 22 0 23 22 0 23 22 0 23 22 0 23 22 0 23 22 0 23 22
L1
32 BICK
R1
32 BICK
L2
32 BICK
R2
32 BICK
L1-#1
32 BICK
R1-#1
32 BICK
L2-#1
32 BICK
R2-#1
32 BICK
Figure 18. ã«ã¹ã±ã¼ãTDMã¿ã¤ãã³ã°
MS1494-J-02
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2013/05
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