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AK4343VN Datasheet, PDF (52/99 Pages) Asahi Kasei Microsystems – Stereo DAC with HP/RCV/SPK-AMP | |||
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[AK4343]
â 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. 10kΩͰ͢ɻPMLO=LOPS bits = â0â Í´Í¢ÎͱɺÏÏ«Êμ΢ϯà§à¬¶Í´Í³
ÎAVSSÍ´100kΩ(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 42Í´à£Í¢ÎÍÍ´CΧοÏϧÞɺεÏϨΦϥΠϯà¥à¾Í·Ï¥Î ϯÎ
20kΩͷà°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
DAC
âDACLâ
âLOVLâ
LOUT pin
ROUT pin
LOPS
0
1
Figure 41. 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 45. 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 46. εÏϨΦϥΠϯà¥à¾ÏϦϡÊÏàªà°
LOUT 1μF
ROUT
220Ω
20kΩ
Figure 42. εÏϨΦϥΠϯà¥à¾Öà·ÍÕ³à¿(ÏοÏԻ௿ݮճà¿à¢à¼»à£)
MS0478-J-02
- 52 -
2010/11
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