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AK4495SEQ Datasheet, PDF (24/58 Pages) Asahi Kasei Microsystems – Quality-oriented Premium 32-Bit 2ch DAC | |||
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[AK4495S]
MCLK= 256fs/384fsã®ã¨ããAuto Setting Modeã¯32kHz~96kHzã®ãµã³ããªã³ã°ã¬ã¼ãã¾ã§å¯¾å¿ãã¾ã
(Table 7)ãä½ãã32kHz~48kHzã®ãµã³ããªã³ã°ã¬ã¼ãã§ã¯ãMCLK= 256fs/384fsã§ã®DR, S/Nã¯ãMCLK=
512fs/768fsã®æã«æ¯ã¹ã¦3dBç¨åº¦å£åãã¾ãã
ACKS pin
MCLK
DR,S/N
L
256fs/384fs/512fs/768fs
120dB
H
256fs/384fs
117dB
H
512fs/768fs
120dB
Table 7. MCLKå¨æ³¢æ°ã¨DR, S/Nã®é¢ä¿(fs = 44.1kHz)
3. Digital filter
AK4495Sã§ã¯SD pin, SLOW pinã§4種é¡ã®ãã£ã¸ã¿ã«ãã£ã«ã¿ãè¨å®ã§ãã¾ãããããã好ã¿ã®é³è³ªã§é³
楽åçãå¯è½ã§ãã
SD pin
L
L
H
H
SLOW pin
Mode
L
Sharp roll-off filter
H
Slow roll-off filter
L
Short delay Sharp roll-off filter
H
Short delay Slow roll-off filter
Table 8. Digital Filter Setting
(default)
AK4495Sã¯ããå¨æ³¢æ°ç¹æ§ãç·©ãããåä½ãå¯è½ã§ããSSLOW pin = âHâã®ã¨ããã®åä½ã«ãªãã¾ãã
(2) ã·ãªã¢ã«ã¢ã¼ã (PSN pin = âLâ)
1. Manual Setting Mode (ACKS bit = â0â)
MCLKå¨æ³¢æ°ã¯èªåè¨å®ããã¾ãããDFS2-0 bitã§ãµã³ããªã³ã°ã¹ãã¼ããè¨å®ãã¾ã(Table 9)ãåã¹ã
ã¼ãã§ã®MCLKå¨æ³¢æ°ã¯Table 10ã§ç¤ºãããå¨æ³¢æ°ãå¤é¨ããä¾çµ¦ãã¦ä¸ããããã¯ã¼ãã¦ã³è§£é¤æ
(PDN pin = âLâ ï® âHâ)ã¯Manual Setting Modeã«è¨å®ããã¾ããDFS2-0 bitãåãæ¿ããå ´åã¯RSTN bitã§
ãªã»ãããã¦ä¸ããã
DFS2
0
0
0
0
1
1
1
1
DFS1 DFS0
Sampling Rate (fs)
0
0
Normal Speed Mode 30kHz ï¾ 54kHz
0
1
Double Speed Mode 54kHz ï¾ 108kHz
1
0
Quad Speed Mode
120kHz ï¾
216kHz
1
1
Revered
-
0
0
Oct Speed Mode
384kHz
0
1
Hexa Speed Mode
768kHz
1
0
Revered
-
1
1
Revered
-
Table 9. Sampling Speed (Manual Setting Mode @Serial Mode)
(default)
MS1560-J-01
- 24 -
2013/11
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