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AK5388AEQ Datasheet, PDF (25/31 Pages) Asahi Kasei Microsystems – 120dB 24-bit 192kHz 4-Channel ADC | |||
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Digital Ground
Analog Ground
[AK5388A]
System
Controller
1 LIN1+
2 LIN1-
3 VSS1
4 AVDD1
5 TEST1
6 VSS2
7 CKS0
8 CKS1
9 CKS2
10 PDN
11 M/SN
RIN2+ 33
RIN2- 32
VSS6 31
AVDD2 30
TEST2 29
VSS5 28
VSS4 27
DVDD2 26
HPFE 25
MONO 24
DIF 23
Figure 22. Ground Layout
注: VSS1-6ã¯åãã¢ããã°ã°ã©ã³ãã«æ¥ç¶ãã¦ä¸ããã
1. ã°ã©ã³ãã¨é»æºã®ãã«ãããªã³ã°
é»æºã¨ã°ã©ã³ãã®åãæ¹ã«ã¯åå注æãã¦ä¸ãããé常ãAVDD1/2, DVDD1/2ã«ã¯ã·ã¹ãã ã®ã¢ããã°é»æº
ãä¾çµ¦ãã¾ããAVDD1/2, DVDD1/2ãå¥é»æºã§ä¾çµ¦ãããå ´åã«ã¯ãé»æºç«ã¡ä¸ãã·ã¼ã±ã³ã¹ãèããå¿
è¦
ã¯ããã¾ãããVSS1-6ã¯ã¢ããã°ã°ã©ã³ãã«æ¥ç¶ãã¦ä¸ãããã·ã¹ãã ã®ã°ã©ã³ãã¯ã¢ããã°ã¨ãã£ã¸ã¿ã«
ã§åãã¦é
ç·ãPCãã¼ãä¸ã®é»æºã«è¿ãã¨ããã§æ¥ç¶ãã¦ä¸ãããå°å®¹éã®ãã«ãããªã³ã°ã³ã³ãã³ãµã¯ãª
ãã¹ãé»æºãã³ã®è¿ãã«æ¥ç¶ãã¦ä¸ããã
2. åºæºé»å§
A/Då¤æã®åºæºé»å§ã¯VREFP1/2 pinã®é»å§ã¨VREFL1/2 pinã®é»å§ã®å·®ã§ããVREFL1/2 pinã¯ã¢ããã°ã°ã©ã³
ãã«æ¥ç¶ããVREFP1/2 pinã«ã¯é»æºã¨åæ§ãé«å¨æ³¢ãã¤ãºãé¤å»ããããã«0.1μFã®ã»ã©ããã¯ã³ã³ãã³ãµã¨
10μF以ä¸ã®é»è§£ã³ã³ãã³ãµãVREFP1/2 pinã¨VREFL1/2pin éã«æ¥ç¶ãã¦ä¸ãããç¹ã«ã»ã©ããã¯ã³ã³ãã³ãµ
ã¯ãã³ã«ã§ããã ãè¿ã¥ãã¦æ¥ç¶ãã¦ä¸ãããããã«ãã£ã¸ã¿ã«ä¿¡å·ãç¹ã«ã¯ããã¯ã¯å¤èª¿å¨ã¸ã®ã«ãããª
ã³ã°ãé¿ããããã«VREFP1/2 pinããã§ããã ãé¢ãã¦ä¸ããã
VCOM1/2ã¯ã¢ããã°ä¿¡å·ã®ã³ã¢ã³é»å§ã¨ãã¦ä½¿ããã¾ãããã®ãã³ã«ã¯é«å¨æ³¢ãã¤ãºãé¤å»ããããã«
2.2μFç¨åº¦ã®ã»ã©ããã¯ã³ã³ãã³ãµãAVSSã¨ã®éã«æ¥ç¶ãã¦ä¸ãããç¹ã«ãã»ã©ããã¯ã³ã³ãã³ãµã¯ãã³ã«
ã§ããã ãè¿ã¥ãã¦æ¥ç¶ãã¦ä¸ãããVCOM1/2 pinããé»æµãåã£ã¦ã¯ããã¾ããããã£ã¸ã¿ã«ä¿¡å·ãç¹ã«
ã¯ããã¯ã¯å¤èª¿å¨ã¸ã®ã«ãããªã³ã°ãé¿ãããããVCOM1/2 pinããã§ããã ãé¢ãã¦ä¸ããã
3. ã¢ããã°å
¥å
ã¢ããã°å
¥åä¿¡å·ã¯åãã£ãã«ã®å·®åå
¥åãã³ããå¤èª¿å¨ã«å
¥åããã¾ããå
¥åé»å§ã¯LIN+(RIN+)ã¨
LINâ(RINâ)ã®å·®ã®é»å§ã«ãªãã¾ããå
¥åã¬ã³ã¸ã¯Â±2.8Vpp(typ)ã§ããAK5388Aã¯VSS1-6ããAVDD1/2ã¾ã§ã®
é»å§ãå
¥åãããã¨ãã§ãã¾ããåºåã³ã¼ãã®ãã©ã¼ããã㯠2âsã³ã³ããªã¡ã³ãã§ããDCãªãã»ãã(ADC
èªä½ã®DCãªãã»ãããå«ã)ã¯å
èµã®HPFã§ãã£ã³ã»ã«ããã¾ãã
AK5388Aã¯128fsã§ã¢ããã°å
¥åããµã³ããªã³ã°ãã¾ãããã£ã¸ã¿ã«ãã£ã«ã¿ã¯ã128fsã®æ´æ°åä»è¿ã®å¸¯å
ãé¤ãé»æ¢å以ä¸ã®ãã¤ãºãå
¨ã¦é¤å»ãã¾ããã»ã¨ãã©ã®ãªã¼ãã£ãªä¿¡å·ã§ã¯128fsä»è¿ã«å¤§ããªãã¤ãºãæ
ã¤ãã¨ã¯ããã¾ããã®ã§ãç°¡åãªRCãã£ã«ã¿ã§128fsä»è¿ã®ãã¤ãºãååã«æ¸è¡°ããããã¨ãã§ãã¾ãã
AK5388Aã®ã¢ããã°é»æºé»å§ã¯+5Vã«ãªã£ã¦ãããã¢ããã°å
¥åãã³ã«ã¯ãAVDD1/2+0.3V以ä¸ã
(VSS1-6)â0.3V以ä¸ã®é»å§ã¨10mA以ä¸ã®é»æµãå
¥åãã¦ã¯ããã¾ãããé大é»æµã®æµå
¥ã¯å
é¨ã®ä¿è·åè·¯ã®
ç ´å£ãããã«ã¯ã©ããã¢ãããå¼ãèµ·ãããICã®ç ´å£ã«è³ãã¾ããå¾ã£ã¦ãå¨è¾ºã®ã¢ããã°åè·¯ã®é»æºé»å§
ãã±15Vçã®å ´åã¯ã¢ããã°å
¥åãã³ã絶対æ大å®æ ¼ä»¥ä¸ã®ä¿¡å·ããä¿è·ããå¿
è¦ãããã¾ãã
MS1494-J-02
- 25 -
2013/05
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