AK4647VQ Datasheet, PDF (39/72 Pages) Asahi Kasei Microsystems – Stereo CODEC with MIC/HP-AMP

ASAHI KASEI
[AK4647]
„ ग़ྗϘϦϡʔϜ
AK4647͸MUTEΛؚΉ0.5dBεςοϓɺ256ϨϕϧͷνϟωϧಠཱσΟδλϧग़ྗϘϦϡʔϜ(DATT)Λ಺ଂ
͠·͢ɻ͜ͷϘϦϡʔϜ͸DACͷલஈʹ͋ΓɺೖྗσʔλΛ+12dB͔Β−115dBݮͰ·ਰɺ·ͨ͸ϛϡʔτ͠
·͢ɻDVOLC bitΛ “1”ʹ͢ΔͱɺDVL7-0 bitsͰLch, RchͷϘϦϡʔϜΛಉ࣌ʹίϯτϩʔϧͰ͖·͢ɻDVOLC
bit͕ “0”ͷ৔߹ɺLch, RchͷϘϦϡʔϜ͸ಠཱʹίϯτϩʔϧͰ͖·͢ɻ·ͨɺATTઃఆؒͷભҠ͸1061Ϩϕ
ϧ·ͨ͸256/fsͰιϑτભҠ͠·͢ɻભҠεςοϓ͸DVTM bitͰઃఆ͠·͢ɻDVTM bit = “0”ͷͱ͖ɺ
00H(+12dB)͔ΒFFH(MUTE)·Ͱʹ͸1061/fs(24ms@fs=44.1kHz)͔͔Γ·͢ɻ
DVL/R7-0
Gain
Step
00H
+12.0dB
01H
+11.5dB
02H
+11.0dB
:
18H
:
0dB
0.5dB
:
:
FDH
−114.5dB
FEH
−115.0dB
FFH
MUTE (−∞)
Table 33. Digital Volume Code Table
Default
DVTM bit
0
1
DVL/R7-0 bits = 00H͔ΒFFH·ͰͷભҠ࣌ؒ
ઃఆ஋
fs=8kHz࣌ fs=44.1kHz࣌
1061/fs
256/fs
133ms
32ms
24ms
6ms
Table 34.ग़ྗϘϦϡʔϜͷભҠ࣌ؒઃఆ
Default
MS0566-J-00
- 39 -
2006/11