AK4631 Datasheet, PDF (37/69 Pages) Asahi Kasei Microsystems – 16-Bit Mono CODEC with ALC & MIC/SPK-AMP

ASAHI KASEI
[AK4631]
„ εϐʔΧΞϯϓ
εϐʔΧΞϯϓ༻ి ݯSVDD ͷిѹൣғ͸ 2.6V ʙ 5.25V ͷൣғͰ೚ҙʹઃఆ͢Δ͜ͱ͕ՄೳͰ͢ɻୠ͠ɺμΠφϛ
οΫεϐʔΧ(50Ωະຬ)࢖༻࣌͸ 2.6V ʙ 3.6V ʹͳΓ·͢ɻ
DAC͔Βग़ྗ͞Εͨ৴߸͸ALC2ճ࿏Λ௨աͯ͠εϐʔΧΞϯϓʹೖྗ͞Ε·͢ɻ͜ͷεϐʔΧΞϯϓ͸ɺ
BTL઀ଓʹΑΔϞϊϥϧग़ྗͰɺSPKG1-0 bitsʹͯήΠϯΛௐ੔͢Δ͜ͱ͕Ͱ͖·͢ɻALC2 OFF࣌ͷεϐʔ
ΧΞϯϓ͔Βͷग़ྗϨϕϧ͸ AVDD ͓Αͼ SPKG1-0 bits ʹΑΓܾ·Γ·͢ɻALC2 ON ࣌ͷग़ྗϨϕϧ͸ AVDD,
SVDD, SPKG1-0 bits ʹΑΓܾ·Γ·͢ɻALC2 ͷग़ྗϨϕϧ͸SVDD ʹൺྫ͠·͢ɻ
SPKG1-0 bits
ήΠϯ
00
0dB
01
+2.04dB
10
+6.22dB
11
+8.26dB
(Note) ήΠϯ͸ SPKG1-0bits= “00” ͔࣌Βͷ૬ର஋
Table 19. ALC2 OFF ࣌ͷSPK-Amp ήΠϯ
SPKG1-0 bits
AVDD
SVDD
ALC2 OFF ࣌SPK-Ampग़ྗ
DAC ೖྗ –0.5dBFS
ALC2 ON ࣌
SPK-Ampग़ྗ
00
3.3V
3.3V
3.09Vpp, 150mW@8Ω
3.09Vpp, 150mW@8Ω
01
3.3V
3.3V
3.92Vpp, 240mW@8Ω
3.92Vpp, 240mW@8Ω
10
3.3V
3.3V
6.34Vpp (Note)
࢖༻ෆՄ
11
3.3V
3.3V
8.02Vpp (Note)
࢖༻ෆՄ
00
3.3V
5.0V
3.09Vpp
࢖༻ෆՄ
01
3.3V
5.0V
3.92Vpp
࢖༻ෆՄ
10
3.3V
5.0V
6.34Vpp
6.34Vpp
11
3.3V
5.0V
8.02Vpp
8.02Vpp
(Note) ৴߸͕ΫϦοϓ͠ͳ͍ͱԾఆͨ͠৔߹ͷग़ྗϨϕϧͰ͢ɻ࣮ࡍʹ͸ɺDAC ͔Β –0.5dBFS ͷ৴߸͕ग़ྗ͞Εͨ
৔߹ɺ࣮ࡍʹ͸৴߸͕ΫϦοϓ͠·͢ɻΫϦοΫͤ͞ͳ͍ͨΊʹ͸DVOL౳ʹΑΓ DAC ͔Βͷग़ྗϨϕϧΛԼ͛ͯɺ
SPK-Amp ͔Βͷग़ྗΛ 3.92Vpp ҎԼʹ཈͑Δඞཁ͕͋Γ·͢ɻ
Table 20 SPK-Amp ग़ྗϨϕϧ
ʻѹిεϐʔΧ࢖༻࣌ͷ஫ҙ఺ʼ
ෛՙ༰ྔ͕30pF Λ௒͑ΔѹిεϐʔΧͱ઀ଓ͢Δ࣌ ͸ɺFigure 34ʹࣔ͢Α͏ʹγϦʔζ఍߅(10ΩҎ্)ΛSPP pin,
SPN pin ͱ εϐʔΧͷؒʹૠೖ͍ͯͩ͘͠͞ɻ·ͨɺ֎෦͔Βѹྗ͕Ճ͑ΒΕͨͱ͖ѹిεϐʔΧ͕ྗిىΛൃੜ͢Δ
ͷͰɺͦͷରࡦʹFigure 34ʹࣔ͢Α͏ʹεϐʔΧͱGNDؒʹπΣφʔμΠΦʔυΛૠೖ͍ͯͩ͘͠͞ɻπΣφʔμΠΦ
ʔυ͸ҎԼͷ৚݅Λຬͨ͢΋ͷΛ࢖༻͍ͯͩ͘͠͞ɻ
SVDD ͷ 92% ≤ πΣφʔμΠΦʔυ(Figure 34ͷZD)ͷπΣφʔిѹ ≤ SVDD+0.3V
Ex) SVDD = 5.0V ͷ࣌ : 4.6V ≤ ZD ≤ 5.3V
ྫ͑͹ɺπΣφʔిѹ 5.1V(Min஋ 4.97V, Max஋ 5.24V) ͷπΣφʔμΠΦʔυ͕࢖༻ՄೳͰ͢ɻ
MS0317-J-01
- 37 -
2004/11