AK4631 Datasheet, PDF (36/69 Pages) Asahi Kasei Microsystems – 16-Bit Mono CODEC with ALC & MIC/SPK-AMP

ASAHI KASEI
[AK4631]
„ ϞϊϥϧϥΠϯग़ྗ (AOUT pin)
DACͷग़ྗ৴߸Λग़ྗ͠·͢ɻDACA bit Λ“0”ʹ͢ΔͱɺAOUTग़ྗΛOFFʹ͢Δ͜ͱ΋ՄೳͰ͢ɻෛՙ఍
߅͸min. 10kΩͰ͢ɻPMAO bit = AOPSN bit = “0” ʹ͢Δͱɺύϫʔμ΢ϯঢ়ଶʹͳΓ AVSS ʹ 100kΩ(typ) Ͱ
ϓϧμ΢ϯ͞Ε·͢ɻAOPSN bit = “1”
ͱ͢ΔͱɺύϫʔηʔϒϞʔυঢ়ଶʹͳΓ·͢ɻ·ͨɺAOPSN bit =
“1” ͱͯ͠ɺPMAO bit Ͱύϫʔμ΢ϯͷON/OFF Λߦ͏ͱɺON/OFF ࣌ʹൃੜ͢ΔϙοϓԻΛ௿͢ݮΔ͜ͱ
͕Ͱ͖·͢ɻ͜ͷͱ͖ɺFigure 32 ʹࣔ͢Α͏ʹCΧοϓϧޙɺϥΠϯΞ΢τͷϥΠϯΛ 20kΩͷ఍߅Ͱϓϧμ
΢ϯ͍ͯͩ͘͠͞ɻ্ཱ͕ͪΓ͓ΑͼཱԼΓͷ࣌ؒ͸C=1µF ͷͱ͖ɺ࠷େ 300 ms
Ͱ͢ɻϞϊϥϧϥΠϯΞ΢τ͸ɺ
PMAO bit = “1” ͔ͭ AOPSN bit = “0” ͰύϫʔΞοϓঢ়ଶͱͳΓ·͢ɻ
1µF
AOUT
220Ω
20kΩ
Figure 32. AOUT ֎෇͚ճ࿏(ϙοϓԻ௿ݮରࡦ࣌)
AOUTίϯτϩʔϧγʔέϯε(AK4631 ͷϙοϓԻ௿ݮରࡦ࣌)
(2)
P M A O b it
(1 )
(3)
A O P S N b it
(5)
(4)
(6)
A O U T p in
N orm al O utput
≥ 300 m s
≥ 300 m s
Figure 33. ϙοϓԻ௿ݮରࡦ࣌ͷAOUT ίϯτϩʔϧγʔέϯε
(1) ύϫʔηʔϒϞʔυΛ ON ͠·͢ɻAOPSN bit = “1”
(2) ύϫʔμ΢ϯΛղআ͠·͢ɻPMAO bit = “1”
AOUT pin ্ཱ͕͕ͪΓ·͢ɻ্ཱ͕ͪΓ࣌ؒ͸ C = 1µF ͷͱ͖ 200 ms(max 300ms) Ͱ͢ɻ
(3) AOUT pin Ͱޙ্ཱ͕͕ͨͬͪύϫʔηʔϒϞʔυΛղআ͠·͢ɻAOPSN bit = “0”
AOUT ग़ྗ͕ՄೳʹͳΓ·͢ɻ
(4) ύϫʔηʔϒϞʔυΛ ON ͠·͢ɻAOPSN bit = “1”
(5) ύϫʔμ΢ϯʹઃఆ͠·͢ɻPMAO bit = “1”
AOUT pin ཱ͕ͪԼ͕Γ·͢ɻཱͪԼ͕Γ࣌ؒ͸ C = 1µF ͷͱ͖ 200 ms(max 300ms) Ͱ͢ɻ
(6) AOUT pin ཱ͕ͪԼ͕ͬͨͰޙύϫʔηʔϒϞʔυΛղআ͠·͢ɻAOPSN bit = “0”
MS0317-J-01
- 36 -
2004/11