AK4368 Datasheet, PDF (31/58 Pages) Asahi Kasei Microsystems – PLL & HP-AMP DAC

ASAHI KASEI
[AK4368]
ϔουϑΥϯΞϯϓͷ֎෦఍߅ͱίϯσϯαͰΧοτΦϑप೾਺(fc)͕ܾ·Γ·͢ɻTable 23ʹ֎෦఍߅ͱί
ϯσϯαͼٴΧοτΦϑप೾਺(fc)ͷؔ܎ͱͦͷ࣌ͷग़ྗύϫʔΛࣔ͠·͢ɻୠ͠ɺϔουϑΥϯͷR_L͸16Ω
ͱ͠·͢ɻग़ྗύϫʔ͸AVDD=2.4, 3.0, 3.3V࣌ͷ஋Ͱ͢ɻϔουϑΥϯΞϯϓͷग़ྗ͸0.47 x AVDD (Vpp)
@−3dBFSͰ͢ɻ
HP-AMP
AK4368
R
C _Headphone
16Ω
R [Ω]
0
6.8
16
C [µF]
220
100
100
47
100
47
Figure 22. ϔουϑΥϯΞϯϓͷ֎෇͚ճ࿏ྫ
fc [Hz]
fc [Hz]
BOOST=OFF BOOST=MIN
Output Power [mW]
HPG=0, 0dB
2.4V
3.0V
3.3V
45
17
20
31
38
100
43
70
28
10
15
18
149
78
50
19
5
8
9
106
47
Table 23. ֎෦ճ࿏, ग़ྗύϫʔͱf ಛͷؔ܎
HPG=1,
4.8dB
3.3V
50
25
13
֤ύεͷON/OFF͸ͦΕͧΕDACHL, LINHL, MINHL, DACHR, RINHR, MINHR bitsͰઃఆ͠·͢ɻHPG bit =
“0” (R₁=100k)ͷͱ͖ՃࢉήΠϯ͸͍ͣΕͷύε΋+0.76dB(typ)Ͱ͢ɻHPG bit = “1” (R₁= 50k)ͷͱ͖DACग़ྗ
৴߸ͷՃࢉήΠϯΛ+6.76dB(typ)ʹ੾Γସ͑·͢ɻ
100k(typ)
LIN/RIN pin
MIN pin
LINHL/RINHR bit
100k(typ)
MINHL/MINHR bit
DACL/DACR
R1
DACHL/DACHR bit
100k(typ)
−
R2
+
1.09R2
−
+
HP-Amp
HPL/HPR pin
Figure 23. ϔουϑΥϯग़ྗͷՃࢉճ࿏(HPG bit = “0”ͷͱ͖)
MS0409-J-01
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2005/08