AK4645AEZ Datasheet, PDF (55/85 Pages) Asahi Kasei Microsystems – Stereo CODEC with MIC/HP-AMP

[AK4645A]
■ ϔουϑΥϯΞϯϓ(HPL/HPR pins)
ϔουϑΥϯΞϯϓͷిݯ͸HVDD͔Β͞څڙΕ·͢ɻίϞϯిѹ͸HVDD/2@VBAT bit = “0”Ͱ͢ɻෛՙ఍
߅͸16Ω (min)Ͱ͢ɻग़ྗిѹ͸HPG bitͰ੾Γସ͑Δ͜ͱ͕Ͱ͖·͢(Table 47)ɻ
HPM bit = “1”ͷͱ͖ɺDACͷग़ྗ৴߸͸[(L+R)/2]ͷϞϊϥϧ৴߸ͱͯ͠HPL, HPR pinsʹग़ྗ͞Ε·͢ɻ
HPM3 bit = “1”ͷͱ͖ɺMICL3, MICR3 bitsͰબ୒͞Εͨ৴߸(LIN3/RIN3ೖྗ·ͨ͸MIC-Ampग़ྗ)͸[(L+R)/2]
ͷϞϊϥϧ৴߸ͱͯ͠HPL, HPR pinsʹग़ྗ͞Ε·͢ɻ
HPG bit
0
Output Voltage [Vpp]
0.6 x AVDD
Table 47. ϔουϑΥϯͷग़ྗిѹ
1
0.91 x AVDD
HPMTN bitΛ “0”ʹ͢ΔͱɺϔουϑΥϯΞϯϓͷίϞϯిѹΛHVSSʹཱͪԼ͛·͢ɻHPMTN bitΛ “1”ʹ
͢ΔͱίϞϯిѹΛHVDD/2@VBAT bit = “0”ʹ্ཱͪ͛·͢ɻϙοϓϊΠζ๷ࢭͷͨΊʹɺMUTET pinͱά
ϥϯυؒʹίϯσϯαΛ઀ଓ͠·͢ɻ্ཱͪ͛ʗཱͪԼ͛࣌ఆ਺͸HVDD͓ΑͼMUTET pinͷίϯσϯαʹ
ൺྫ͠·͢ɻ
ྫ : MUTET pinͷίϯσϯαC=1μF, HVDD=3.3Vͷ৔߹
ɾ
ϔουϑΥϯΞϯϓ্ཱͪ͛ʗཱͪԼ͛࣌ఆ਺: 100ms(typ), 250ms(max)
ɾ
׬શʹཱͪԼ͕Δ·Ͱͷ࣌ؒ: 500ms(max)
PMHPL, PMHPR bitsΛ “0”ʹ͢Δ͜ͱͰɺϔουϑΥϯΞϯϓΛ׬શʹύϫʔμ΢ϯ͢Δ͜ͱ͕Ͱ͖·͢ɻ
͜ͷ࣌ɺHPL, HPR pins͸ “L” (HVSS)ʹͳΓ·͢ɻ
PMHPL bit,
PMHPR bit
HPMTN bit
HPL pin,
HPR pin
(1) (2)
(3)
(4)
Figure 50. ϔουϑΥϯΞϯϓͷύϫʔΞοϓʗμ΢ϯγʔέϯε
(1) ϔουϑΥϯΞϯϓͷύϫʔΞοϓ(PMHPL, PMHPR bits = “1”)ɻग़ྗ͸HVSSͷ··Ͱ͢ɻ
(2) ϔουϑΥϯΞϯϓͷίϞϯిѹ্ཱͪ͛(HPMTN bit = “1”)ɻ
(3) ϔουϑΥϯΞϯϓͷίϞϯిѹཱͪԼ͛(HPMTN bit = “0”)ɻ
(4) ϔουϑΥϯΞϯϓͷύϫʔμ΢ϯ(PMHPL, PMHPR bits = “0”)ɻग़ྗ͸HVSSʹͳΓ·͢ɻϙοϓԻ๷ࢭ
ͷͨΊɺϔουϑΥϯΞϯϓͷίϞϯిѹ͕׬શʹԼ͕͔ͬͯΒύϫʔμ΢ϯ͍ͯͩ͘͠͞ɻ
ʻϔουϑΥϯΞϯϓͷ֎෦ճ࿏ʼ
BOOST=OFF࣌ɺϔουϑΥϯΞϯϓͷ֎෦఍߅ͱίϯσϯαͰΧοτΦϑप೾਺(fc)͕ܾ·Γ·͢ɻόεϒ
ʔετΛซ༻͢Δ͜ͱͰΧοτΦϑप೾਺Λ௿Ҭ΁γϑτ͢Δ͜ͱ͕Ͱ͖·͢ɻTable 48ʹ֎෦఍߅ͱίϯ
σϯαͼٴΧοτΦϑप೾਺(fc)ͷؔ܎ͱͦͷ࣌ͷग़ྗύϫʔΛࣔ͠·͢ɻୠ͠ɺϔουϑΥϯͷR_L͸16Ω
ͱ͠·͢ɻग़ྗύϫʔ͸HVDD=3.0, 3.3, 5V࣌ͷ஋Ͱ͢ɻϔουϑΥϯΞϯϓͷग़ྗ͸0.6 x AVDD (Vpp)@HPG
bit = “0”, 0.91 x AVDD (Vpp)@HPG bit = “1”Ͱ͢ɻ
֎෇͚ͷR͕12ΩҎԼͷ৔߹͸ɺϔουϑΥϯΞϯϓ͕ൃৼ͢ΔՄೳੑ͕͋Γ·͢ͷͰɺൃৼ๷ࢭճ࿏
(0.22μF±20%ͷίϯσϯαͱ10Ω±20%ͷ఍߅)Λ͚ͭͯԼ͍͞ɻ
MS0986-J-00
- 55 -
2008/07