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AK4645EN Datasheet, PDF (56/96 Pages) Asahi Kasei Microsystems – Stereo CODEC with MIC/HP-AMP | |||
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ASAHI KASEI
[AK4645]
 εÏϨΦϥΠϯà¥à¾ (LOUT/ROUT pins)
DACL bitÎ â1âÍ´Í¢ÎͱɺDACÍ·Lch, Rch৴߸ÎͦÎͧÎLOUT, ROUT pinsÍÎγϯάϧΤϯÏ
Í°à¥à¾Í Î
͢ɻDACL bit Î â0âÍ´Í¢Îͱɺà¥à¾ÎOFFÍ´Í¢ÎÍͱÎÕೳͰ͢ɻÍÍ·à£ÉºLOUT, ROUT pins͸VCOMిѹ
Îà¥à¾Í Î͢ɻÎͨɺà·Õà°ß
͸min. 10kâ¦Í°Í¢É»PMLO=LOPS bits = â0â Í´Í¢ÎͱɺÏÏ«Êμ΢ϯà§à¬¶Í´Í³
ÎAVSSÍ´100kâ¦(typ)Í°Ïϧμ΢ϯÍÎÎ͢ɻLOPS bit = â1âͱ͢ÎͱɺÏÏ«ÊηÊÏÏÊÏ
ʹͳÎÎ͢ɻÎ
ͨɺLOPS bit = â1âÍ±Í Í¯ÉºPMLO bitÍ°ÏÏ«Êμ΢ϯͷON/OFF ÎߦÍͱɺON/OFF à£Í´àµà©Í¢ÎÏοÏÔ»Î
௿͢ݮÎÍͱÍÍ°ÍÎ͢ɻÍͷͱÍɺFigure 46Í´à£Í¢ÎÍÍ´CΧοÏϧÞɺεÏϨΦϥΠϯà¥à¾Í·Ï¥Î ϯÎ
20kâ¦Í·à°ß
Í°ÏÏ§Î¼Î¢Ï¯Í Í¯ÍÍ©ÍÍɻཱͪà§ÍÎÍÎͼཱԼÍÎÍ·à£Ø͸C=1µF, AVDD=3.3VͷͱÍÉºà ·
à300msͰ͢ɻεÏϨΦϥΠϯà¥à¾Í¸ÉºPMLO bit = â1âÍÍLOPS bit = â0âÍ°ÏÏ«ÊÎοÏà§à¬¶Í±Í³ÎÎ͢ɻ
εÏϨΦϥΠϯà¥à¾Í·Î®Î ϯ͸LOVL bitÍ°àªà°Í Î͢ɻ
LOM bit = â1âͷͱÍɺDACÍ·à¥à¾à§´ß¸Í¸[(L+R)/2]Í·ÏÏÏ¥Ï§à§´ß¸Í±Í Í¯LOUT, ROUT pinsÍ´à¥à¾ÍÎÎ͢ɻ
LOM3 bit = â1âͷͱÍɺMICL3, MICR3 bitsͰબàÍÎͨ৴߸(LIN3/RIN3à³à¾Îͨ͸MIC-Ampà¥à¾)͸[(L+R)/2]
Í·ÏÏÏ¥Ï§à§´ß¸Í±Í Í¯LOUT, ROUT pinsÍ´à¥à¾ÍÎÎ͢ɻ
DAC
âDACLâ
âLOVLâ
LOUT pin
ROUT pin
LOPS
0
1
Figure 45. εÏϨΦϥΠϯà¥à¾
PMLO
Mode
LOUT/ROUT pin
0
ÏÏ«Êμ΢ϯ
Pull-down to AVSS
1
௨à§à²à¡
௨à§à²à¡
0
ÏÏ«ÊηÊÏ
Fall down to AVSS
1
ÏÏ«ÊηÊÏ
Rise up to VCOM
Table 50. εÏϨΦϥΠϯà¥à¾Í·ÏÊÏ
àªà° (x: Donât care)
Default
LOVL
Gain
à¥à¾à°¿Ñ¹(typ)
0
0dB
0.6 x AVDD
Default
1
+2dB
0.757 x AVDD
Table 51. εÏϨΦϥΠϯà¥à¾ÏϦϡÊÏàªà°
LOUT 1µF
ROUT
220â¦
20kâ¦
Figure 46. εÏϨΦϥΠϯà¥à¾Öà·ÍÕ³à¿(ÏοÏԻ௿ݮճà¿à¢à¼»à£)
MS0543-J-00
- 56 -
2006/09
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