AK4368 Datasheet, PDF (24/58 Pages) Asahi Kasei Microsystems – PLL & HP-AMP DAC

ASAHI KASEI
[AK4368]
„ ALCಈ࡞
ALC bit = “1”ʹઃఆ͢ΔͱɺALCಈ࡞͕։࢝͠·͢ɻALC bit = “0”ͷͱ͖ɺALC෦ͷήΠϯ͸0dBݻఆͰ͢ɻ
[1] ALCϦϛολಈ࡞
ALCϦϛολಈ࡞Ͱ͸ɺDACͷL/RνϟϯωϧͷೖྗϨϕϧ͕ͲΕ͔ҰͭͰ΋ALCϦϛολݕग़Ϩϕϧ
(−6.0dBFS)Λӽ͑ͨ৔߹ɺALCϦϛολATTεςοϓ(LMAT1-0 bits, Table 13) ෼͚ͩࣗಈతʹϘϦϡʔϜ஋Λ
ݮਰͤ͞·͢ɻALCϦϛολಈ࡞ʹΑΓϘϦϡʔϜ஋͕มߋ͞ΕΔͷ͸ɺL/RͦΕͧΕθϩΫϩε͢Δ͔θϩ
ΫϩελΠϜΞ΢τͨ͠ͱ͖Ͱ͢ɻθϩΫϩελΠϜΞ΢τ࣌ؒ͸ROTM1-0 bits (Table 12)Ͱઃఆ͞Ε·͢ɻ
ROTM1
0
0
1
1
ROTM0
0
1
0
1
ALCϦΧόϦ଴ؒ࣌ػ, θϩΫϩελΠϜΞ΢τ࣌ؒ
fs=16kHz fs=22.05kHz fs=24kHz fs=32kHz fs=44.1kHz
1024/fs
64ms
46ms
43ms
32ms
23ms
2048/fs 128ms
93ms
85ms
64ms
46ms
4096/fs
Reserved
256ms
-
186ms
-
171ms
-
128ms
-
93ms
-
Table 12. ALCϦΧόϦ଴ؒ࣌ػ, θϩΫϩελΠϜΞ΢τ࣌ؒ
fs=48kHz
21ms
43ms
85ms
-
Default
LMAT1
0
0
1
1
LMAT0
0
1
0
1
ALC ϦϛολATTεςοϓ
ALC Output ≥ ALC Output ≥ ALC Output ≥ ALC Output ≥
−6.0dBFS
0dBFS
+6dBFS
+12dBFS
1
1
1
1
Default
2
2
2
2
2
2
4
4
2
4
4
8
Table 13. ALCϦϛολATTεςοϓ
MS0409-J-01
- 24 -
2005/08