AK4368 Datasheet, PDF (27/58 Pages) Asahi Kasei Microsystems – PLL & HP-AMP DAC

ASAHI KASEI
[AK4368]
„ σΟδλϧग़ྗϘϦϡʔϜ
AK4368͸MUTEΛؚΉ0.5dBεςοϓɺ256ϨϕϧͷνϟωϧಠཱσΟδλϧग़ྗϘϦϡʔϜ(DATT)Λ಺ଂ͠
·͢ɻ͜ͷϘϦϡʔϜ͸DACͷલஈʹ͋ΓɺೖྗσʔλΛ0dB͔Β−127dBݮͰ·ਰɺ·ͨ͸ϛϡʔτ͠·͢
(Table 17)ɻDATTC bitΛ “1”ʹ͢ΔͱɺATTL7-0 bitͰLch, RchͷϘϦϡʔϜΛಉ࣌ʹίϯτϩʔϧͰ͖·͢ɻ
DATTC bit͕ “0”ͷ৔߹ɺLch, RchͷϘϦϡʔϜ͸ಠཱʹίϯτϩʔϧͰ͖·͢ɻ


ATTL7-0
ATTR7-0
Attenuation
FFH
FEH
FDH
FCH
:
:
02H
01H
00H
0dB
−0.5dB
−1.0dB
−1.5dB
:
:
−126.5dB
−127.0dB
MUTE (−∞)
Default
Table 17. Digital Volume ATT஋
ATT7-0ઃఆ஋ؒͷભҠ࣌ؒ͸ATS bitͰ1061/fsͱ7424/fsͷͲͪΒ͔Λબ୒Ͱ͖·͢(Table 18)ɻATS bit = “0”
ͷͱ͖ATTઃఆؒͷભҠ͸1062ϨϕϧͰιϑτભҠ͠·͢ɻFFH(0dB)͔Β00H(MUTE)·Ͱʹ͸1061/fs (24ms
@fs=44.1kHz)͔͔Γ·͢ɻPDN pinΛ “L” ʹ͢ΔͱɺATT7-0͸00HظॳʹԽ͞Ε·͢ɻATT7-0͸PMDAC bit
Λ “0” ʹ͢ΔͱҰ୴00HʹͳΓɺPMDAC bitΛ “1” ʹ໭͢ͱઃఆ஋ʹ໭͍͖ͬͯ·͢ɻσΟδλϧϘϦϡʔϜ
ػೳ͸ιϑτϛϡʔτػೳͱ͸ಠཱʹಈ࡞͠·͢ɻ
ATS
ATT speed
0dB to MUTE
1 step
0
1061/fs
4/fs
Default
1
7424/fs
29/fs
Table 18. σΟδλϧϘϦϡʔϜͷATT7-0ઃఆ஋ؒͷભҠ࣌ؒ
MS0409-J-01
- 27 -
2005/08