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AK4343VN Datasheet, PDF (83/99 Pages) Asahi Kasei Microsystems – Stereo DAC with HP/RCV/SPK-AMP | |||
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[AK4343]
1. άϥϯÏ
ͱిݯͷÏΧοÏϦϯά
ͱݯిάϥϯÏ
Í·à¤Îà¹Í´Í¸à¥à·¼à®«ÒÍ Í¯Ô¼ÍÍɻ௨à§ÉºAVDD, DVDD, HVDDʹ͸γεÏÏÍ·ÎÏϩάి
ݯÎÍ¢ÎÍ Ú
ÚÉ»AVDD, DVDD, HVDDÍà¸à°¿ÍÚ
ÚͰݯÎÎà§ß¹Í´Í¸Éºà°¿Íà§Íªà½±Ý¯Î³ÊÎϯεÎßÍÎ
à¶à½Í¸ÍÎÎͤÎÉ»AVSS, DVSS, HVSS͸ÎÏϩάάϥϯÏ
Í´àªà¬Í ͯԼÍÍɻγεÏÏͷάϥϯÏ
͸ÎÏ
ϩάͱÏÎδλϧͰ෼Íͯà´àª¢Í PCÏÊÏ
à§Í·à°¿ÍͱÍÛʹݯÎÍ°àªà¬Í ͯԼÍÍÉ»à¦à¼°à¾Í·ÏΧοÏϦϯ
άίϯÏϯα͸ͳÎÎÍిݯÏϯͷÛÍÍ´àªà¬Í ͯԼÍÍÉ»
2. ج४ిѹ
VCOM͸ÎÏϩά৴߸ͷίÏÏ¯à°¿Ñ¹Í±Í Í¯à¢ÎÎÎ͢ɻÍÍ·Ïϯʹ͸ߴप೾ÏΠζÎà¦Í¢ÚÎͨÎÍ´2.2μF
à°à±Í·à°¿Õ²Î¯Ï¯Ïϯαͱà¸à¾»Í´0.1μFͷηϥÏοΫίϯÏϯαÎAVSSͱͷØÍ´àªà¬Í ͯԼÍÍÉ»à²Í´ÉºÎ·Ï¥
ÏοΫίϯÏϯα͸ÏϯʹͰÍÎÍ©ÍÛÍ®Íͯàªà¬Í ͯԼÍÍÉ»VCOM pinÍÎిྲྀÎà¤Í¬Í¯Í¸ÍÍÎͤÎÉ»
ÏÎδλϧ৴߸ɺà²Í´Î«Ï©Î¿Î«Í¸à¸¡à¯ÎثͷΧοÏϦϯάÎà¶ÍÎͨÎɺVCOM pinÍÎÍ°ÍÎÍ©Íà½Í ͯ
Ô¼ÍÍÉ»
3. ÎÏϩάà³à¾
ÏΠΫà³à¾ÉºÏ¥Î ϯà³à¾Í±MINà³à¾Í¸Î³Ï¯Î¬Ï§Î¤Ï¯Ï
à³à¾Í´Í³Í¬Í¯ÍÎ͢ɻÏΠΫà³à¾Í±Ï¥Î ϯà³à¾Í·à³à¾
Ϩϯδ͸಺෦ͷίÏϯిѹ(0.45 x AVDD)Îத৺ʹ0.06 x AVDD Vpp(typ)@MGAIN1-0 bits = â01â, 0.03 x AVDD
Vpp(typ)@MGAIN1-0 bits = â10â, 0.015 x AVDD Vpp(typ)@MGAIN1-0 bits = â11âÎͨ͸ɺ0.6 x AVDD
Vpp(typ)@MGAIN1-0 bits = â00âʹͳÎÎ͢ɻMINà³à¾Í·à³à¾Ï¨Ï¯Î´Í¸à²ºà·¦Í·Î¯Ïϯిѹ(0.45 x AVDD)Îத৺
Í´0.6 x AVDD Vpp(typ)ʹͳÎÎ͢ɻ௨à§Éºà³à¾à§´ß¸Í¸Î¯Ï¯ÏϯαͰDCΧοÏÍ Î͢ɻÍÍ·à£Î§Î¿ÏΦÏप
೾਺͸fc=1/(2ÏRC)Ͱ͢ɻAK4343͸AVSSÍÎAVDDÎͰͷిѹÎà³à¾Í¢ÎÍͱÍÍ°ÍÎ͢ɻ
4. ÎÏϩάà¥à¾
DACʹର͢Îà³à¾ÏÊλͷÏÎ¥ÊÏοÏ͸2âsίϯÏϦÏϯÏͰɺ7FFFH(@16bit)Í´à¬°Í Í¯Í¸à©Í·ÏϧεÎÊ
ϧɺ8000H(@16bit)Í´à¬°Í Í¯Í¸à·Í·ÏϧεÎÊϧɺ0000H(@16bit)Ͱͷཧ࿦à®Í¸VCOMిѹͰ͢ɻVCOMిѹ
͸ɺεÏϨΦϥΠϯà¥à¾Í±Ï¨Î³ÊÏà¥à¾Í°Í¸0.45 x AVDD (typ)Îத৺ʹà¥à¾ÍÎɺÏοÏ
ÏΥϯà¥à¾Í±ÎµÏ
ÊΧà¥à¾Í°Í¸HVDD/2Îத৺ʹà¥à¾ÍÎÎ͢ɻ
MS0478-J-02
- 83 -
2010/11
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