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| AK8135S Datasheet, PDF (10/16 Pages) Asahi Kasei Microsystems – Multi Clock Generator with VCFS | |||
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[AK8135S]
ï¼ï¼æ©è½èª¬æ
AK8135S ã® VCFSï¼Voltage Controlled Frequency Synthesizerï¼ã¯å³4-1 ã§ç¤ºãããããã« AD å¤
æå¨ã¨é«åè§£è½ PLL ã§æ§æããã¾ãã VIN1 端ååã³ VIN2 端åã¸ã®å
¥åé»å§ã«ãã VCFS1 åºå
å¨æ³¢æ°ï¼REF1ãREF2ï¼åã³ VCFS2 åºåå¨æ³¢æ°ï¼REF3ï¼ãç´0.25ppm ã¹ãããã§ç¬ç«ã«å¶å¾¡ãããã¨
ãã§ãã¾ãã
VIN1ãVIN2 å
¥åé»å§ã AD å¤æãããµã³ããªã³ã°å¨æ³¢æ°ã¯ fs=4.88kHz ã§ããVIN1 端åãVIN2 端
åã¸å
¥åãããå¨æ³¢æ°å¶å¾¡ä¿¡å·ã¯ãå¤é¨ LPF ã«ããPWMä¿¡å·ãå¹³æ»åããã DC ä¿¡å·ã§ãããã¨ãå
æã¨ãã¦ãã¾ãã
AK8135S
å¤é¨ LPF
PWM
VIN1/2
ADCï¼FLT
30.000MHï½
High-resolution
PLL
VCFS1/2
REF1-3 å¨æ³¢æ°
å³ï¼ï¼ï¼
VCFS2:+135ppm
VCFS1:+120ppm
REF1-3
0ppm (27.0MHz) 0
VCFS1:-120ppm
VCFS2:-135ppm
7
VDD
46
1
39
VDD VDD
2
46
VIN1/2å
¥åé»å§ [V]
VDD
å³ï¼ï¼ï¼
draft-J-00
- 10 -
2011/04
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