AK4642VN Datasheet, PDF (41/82 Pages) Asahi Kasei Microsystems – 16-Bit ΔΣ Stereo CODEC with MIC/HP/SPK-AMP

ASAHI KASEI
[AK4642]
„ σΟΤϯϑΝγεϑΟϧλίϯτϩʔϧ
IIRϑΟϧλʹΑΔ3प೾਺(32kHz, 44.1kHz, 48kHz)ରԠͷσΟΤϯϑΝγεϑΟϧλ(tc=50/15µsಛੑ)Λ಺ଂ
͍ͯ͠·͢ɻೖྗσʔλʹରͯ͠ɺDEM1-0 bitͰબ୒͞Εͨप೾਺ͷσΟΤϯϑΝγεϑΟϧλ͕༗ޮʹͳ
Γ·͢(Table 29)ɻ
DEM1 DEM0
Mode
0
0
44.1kHz
0
1
OFF
Default
1
0
48kHz
1
1
32kHz
Table 29. σΟΤϯϑΝγείϯτϩʔϧ
„ όεϒʔετճ࿏
BST1-0 bitΛίϯτϩʔϧ͢Δ͜ͱͰɺDAC͔Βόεϒʔετ͞Εͨ৴߸Λग़ྗ͢Δ͜ͱ͕Ͱ͖·͢(Table
30)ɻ·ͨɺBST1-0 bit = “01”(MIN)ݻʹఆ͢Δ͜ͱͰɺϔουϑΥϯग़ྗͷDCΧοτ༻ίϯσϯαΛ47µF·
Ͱখ͘͢͞Δ͜ͱ͕Ͱ͖·͢ɻόεϒʔετ͞Εͨ৴߸͕ϑϧεέʔϧΛ௒͑ͨ৔߹ɺDAC͔Βͷग़ྗ͕Ϋ
Ϧοϓ͠·͢ɻFigure 26͸−20dBͷ৴߸ϨϕϧΛೖྗͨ͠৔߹ͷόεϒʔετޙͷಛੑͰ͢ɻ
Boost Filter (fs=44.1kHz)
20
MAX
15
MID
10
MIN
5
0
-5
10
100
1000
Frequency [Hz]
Figure 26. όεϒʔετप೾਺ (fs=44.1kHz)
BST1
BST0
Mode
0
0
OFF
Default
0
1
MIN
1
0
MID
1
1
MAX
Table 30. όεϒʔετίϯτϩʔϧ
10000
MS0358-J-02
- 41 -
2005/04