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AK4631 Datasheet, PDF (56/69 Pages) Asahi Kasei Microsystems – 16-Bit Mono CODEC with ALC & MIC/SPK-AMP
ASAHI KASEI
[AK4631]
1. άϥϯυͱిݯͷσΧοϓϦϯά
ͱݯిάϥϯυͷऔΓํʹ͸े෼஫ҙͯ͠Լ͍͞ɻ௨ৗɺAVDD, DVDD, SVDDʹ͸γεςϜͷΞφϩάి
ݯΛ͢·͠څڙɻAVDD, DVDD, SVDD͕ผి͞څڙͰݯΕΔ৔߹ʹ͸ɺి্ཱ͛ͪݯγʔέϯεΛߟ͑Δ
ඞཁ͸͋Γ·ͤΜɻAVSS, DVSS, SVSS͸Ξφϩάάϥϯυʹ઀ଓͯ͠Լ͍͞ɻγεςϜͷάϥϯυ͸Ξφ
ϩάͱσΟδλϧͰ෼͚ͯ഑ઢ͠PCϘʔυ্ͷి͜ͱ͍ۙʹݯΖͰ઀ଓͯ͠Լ͍͞ɻখ༰ྔͷσΧοϓϦϯ
άίϯσϯα͸ͳΔ΂͘ిݯϐϯͷۙ͘ʹ઀ଓͯ͠Լ͍͞ɻ
2. ج४ిѹ
VCOM͸Ξφϩά৴߸ͷίϞϯిѹͱͯ͠࢖ΘΕ·͢ɻ͜ͷϐϯʹ͸ߴप೾ϊΠζΛআ͢ڈΔͨΊʹ2.2µF
ఔ౓ͷిղίϯσϯαͱฒྻʹ0.1µFͷηϥϛοΫίϯσϯαΛAVSSͱͷؒʹ઀ଓͯ͠Լ͍͞ɻಛʹɺηϥ
ϛοΫίϯσϯα͸ϐϯʹͰ͖Δ͚͚ͩۙͮͯ઀ଓͯ͠Լ͍͞ɻVCOM pin͔ΒిྲྀΛऔͬͯ͸͍͚·ͤΜɻ
σΟδλϧ৴߸ɺಛʹΫϩοΫ͸มௐ΁ثͷΧοϓϦϯάΛආ͚ΔͨΊɺVCOM pin͔ΒͰ͖Δ͚ͩ཭ͯ͠
Լ͍͞ɻ
3. Ξφϩάೖྗ
ϚΠΫೖྗͱBEEPೖྗ͸γϯάϧΤϯυೖྗʹͳ͓ͬͯΓɺೖྗϨϯδ͸಺෦ͷίϞϯిѹ(typ: 0.45 x
AVDD)Λத৺ʹ0.06 x AVDD Vpp(typ)ɺ·ͨ͸ɺ0.6 x AVDD Vpp(typ)ʹͳΓ·͢ɻ௨ৗɺೖྗ৴߸͸ίϯσ
ϯαͰDCΧοτ͠·͢ɻ͜ͷ࣌ΧοτΦϑप೾਺͸fc=1/(2πRC)Ͱ͢ɻAK4631͸AVSS͔ΒAVDD·Ͱͷి
ѹΛೖྗ͢Δ͜ͱ͕Ͱ͖·͢ɻ
4. Ξφϩάग़ྗ
DACʹର͢ΔೖྗσʔλͷϑΥʔϚοτ͸2’sίϯϓϦϝϯτͰɺ7FFFH(@16bit)ʹରͯ͠͸ਖ਼ͷϑϧεέʔ
ϧɺ8000H(@16bit)ʹରͯ͠͸ෛͷϑϧεέʔϧɺ0000H(@16bit)Ͱͷཧ࿦஋͸VCOMిѹͰ͢ɻVCOMిѹ
͸ɺϞϊϥϧϥΠϯग़ྗͼٴϞϊϥϧग़ྗͰ͸0.45 x AVDD (typ)Λத৺ʹग़ྗ͞ΕɺεϐʔΧग़ྗͰ͸
SVDD/2Λத৺ʹग़ྗ͞Ε·͢ɻ
MS0317-J-01
- 56 -
2004/11