AK4642VN Datasheet, PDF (49/82 Pages) Asahi Kasei Microsystems – 16-Bit ΔΣ Stereo CODEC with MIC/HP/SPK-AMP

ASAHI KASEI
[AK4642]
„ εϐʔΧΞϯϓ
εϐʔΧΞϯϓ༻ిݯHVDDͷిѹൣғ͸2.6V ∼ 5.25VͷൣғͰ೚ҙʹઃఆ͢Δ͜ͱ͕ՄೳͰ͢ɻୠ͠ɺμ
ΠφϛοΫεϐʔΧ(50Ωະຬ)࢖༻࣌͸2.6V ∼ 3.6VʹͳΓ·͢ɻ
εϐʔΧछྨ
μΠφϛοΫεϐʔΧ
ѹిεϐʔΧ
HVDD
ෛՙ఍߅ (min)
2.6 ∼ 3.6V
8Ω
2.6 ∼ 5.25V
50Ω (Note 23)
ෛՙ༰ྔ (max)
30pF
3µF (Note 23)
Note 23. Figure 33ʹ͓͍ͯɺLoad Impedance͸γϦʔζ఍߅ͱ1kHzʹ͓͚ΔѹిεϐʔΧͷΠϯϐʔμϯε
ͷ߹੒ΠϯϐʔμϯεͰ͢ɻLoad Capacitance͸ѹిεϐʔΧͷ༰ྔ੒෼Ͱ͢ɻѹిεϐʔΧΛ࢖༻
͢Δ৔߹ɺSPP, SPN pinʹͦΕͧΕ10ΩҎ্ͷγϦʔζ఍߅Λ઀ଓͯ͠Լ͍͞ɻ
Table 40. εϐʔΧͷछྨͱిిݯѹ
DAC͔Βग़ྗ͞Εͨ৴߸ΛϞϊϥϧ৴߸[(L+R)/2]ʹม͠׵ɺεϐʔΧΞϯϓʹೖྗ͠·͢ɻ͜ͷεϐʔΧΞ
ϯϓ͸ɺBTL઀ଓʹΑΔϞϊϥϧग़ྗͰɺSPKG1-0 bitsʹͯήΠϯΛௐ੔͢Δ͜ͱ͕Ͱ͖·͢ɻεϐʔΧΞ
ϯϓ͔Βͷग़ྗϨϕϧ͸AVDD͓ΑͼSPKG1-0 bitsʹΑΓܾ·Γ·͢ɻ
SPKG1-0 bits
00
01
10
11
ήΠϯ
ALC bit = “0”
ALC bit = “1”
+4.43dB
+6.43dB
+6.43dB
+10.65dB
+8.43dB
+12.65dB
+12.65dB
+14.65dB
Table 41. SPK-Amp ήΠϯ
Default
AVDD HVDD SPKG1-0 bits
SPK-Ampग़ྗ (DACೖྗ=0dBFS)
ALC bit = “0”
ALC bit = “1”
(LMTH1-0 bits = “00”)
00
3.30Vpp
3.11Vpp
3.3V
01
4.15Vpp (Note 40)
3.92Vpp
10
6.75Vpp (Note 40)
6.37Vpp (Note 40)
3.3V
11
8.50Vpp (Note 40)
8.02Vpp (Note 40)
00
3.30Vpp
3.11Vpp
5.0V
01
10
4.15Vpp
6.75Vpp
3.92Vpp
6.37Vpp
11
8.50Vpp
8.02Vpp
Note 40. ৴߸͕ΫϦοϓ͠ͳ͍ͱԾఆͨ͠৔߹ͷग़ྗϨϕϧͰ͢ɻ࣮ࡍʹ͸ɺDAC ͔Β0dBFSͷ৴߸͕ग़ྗ
͞Εͨ৔߹ɺ࣮ࡍʹ͸৴߸͕ΫϦοϓ͠·͢ɻΫϦοϓͤ͞ͳ͍ͨΊʹ͸DVOL౳ʹΑΓDAC͔Β
ͷग़ྗϨϕϧΛԼ͛ͯɺSPK-Amp͔Βͷग़ྗΛ4.0VppҎԼʹ཈͑Δඞཁ͕͋Γ·͢ɻ
Table 42. SPK-Amp ग़ྗϨϕϧ
MS0358-J-02
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2005/04