AK4343VN Datasheet, PDF (37/99 Pages) Asahi Kasei Microsystems – Stereo DAC with HP/RCV/SPK-AMP

[AK4343]
■ ήΠϯΞϯϓ
AK4343͸ήΠϯΞϯϓΛ಺ଂ͍ͯ͠·͢ɻMGAIN1-0 bitʹΑΓήΠϯΛઃఆ͢Δ͜ͱ͕Ͱ͖·͢(Table 22)ɻ
ೖྗΠϯϐʔμϯε͸MGAIN1-0 bits = “00”ͷͱ͖typ. 60kΩɺMGAIN1-0 bits = “01”, “10”, “11”ͷͱ͖typ. 30kΩ
Ͱ͢ɻ
MGAIN1 bit
0
0
1
1
MGAIN0 bit Input Gain
0
0dB
1
+20dB
0
+26dB
1
+32dB
Table 22. ೖྗήΠϯ
(default)
■ Digital EQ/HPF/LPFճ࿏
AK4343Ͱ͸ೖྗσʔλʹରͯ͠ɺ෩੾ΓԻϑΟϧλɺεςϨΦڧײௐɺήΠϯิਖ਼ͼٴALCͷॲཧΛߦ͏
͜ͱ͕Ͱ͖·͢(Figure 32ࢀর)ɻFIL1, FIL3, EQ͸ͦΕͧΕ1࣍ͷIIRϑΟϧλͰɺϑΟϧλ܎਺Λ೚ҙʹઃఆ
Ͱ͖·͢ɻALCʹ͍ͭͯ͸ɺ “ALCಈ࡞”ͷ߲Λࢀরͯ͠Լ͍͞ɻ
εςϨΦڧײௐͷATT͸FIL3ͷ܎਺Ͱಉ࣌ʹઃఆ͠·͢ɻ
ήΠϯิਖ਼ͷήΠϯ͸GN1-0 bits(Table 23ࢀর)ͱEQͷ܎਺ͷ૊Έ߹ΘͤͰઃఆ͠·͢ɻ
FIL1, FIL3͸ͦΕͧΕF1AS, F3AS bits͕ “0”ͷͱ͖HPFʹͳΓɺF1AS, F3AS bits͕ “1”ͷͱ͖LPFʹͳΓ·͢ɻ
FIL3ΛOFF(MUTE)͠ɺEQ, FIL1Λ0dBͰεϧʔͤ͞Δ৔߹͸ɺͦΕͧΕFIL3, EQ, FIL1 bitsΛ “0”ʹઃఆͯ͠
Լ͍͞ɻ֤ϑΟϧλ܎਺Λॻ͖͑׵Δ৔߹͸ɺҰ౓εϧʔ(FIL3͸MUTE)ͷϞʔυʹ͔ͯ͠ΒߦͬͯԼ͍͞ɻ
෩੾ΓԻϑΟϧλ
FIL1
܎਺೚ҙ
F1A13-0
F1B13-0
F1AS
εςϨΦڧײௐ
FIL3
܎਺೚ҙ
F3A13-0
F3B13-0
F3AS
0dB ∼ -10dB
MUTE
(FIL3 _{܎਺Ͱઃఆ})
ήΠϯิਖ਼
EQ
Gain
ALC
܎਺೚ҙ
EQA15-0
EQB13-0
EQC15-0
+12dB ∼ 0dB
GN1-0
+24/+12/0dB
Figure 32. Digital EQ/HPF/LPF
GN1
GN0
Gain
0
0
0dB
(default)
0
1
+12dB
1
x
+24dB
Table 23. Gain෦ͷήΠϯઃఆ (x: Don’t care)
MS0478-J-02
- 37 -
2010/11