AK4368 Datasheet, PDF (34/58 Pages) Asahi Kasei Microsystems – PLL & HP-AMP DAC

ASAHI KASEI
[AK4368]
„ ύϫʔΞοϓʗμ΢ϯγʔέϯε(EXT mode)

1) DAC → HP-Amp
Power Supply
PDN pin
PMVCM bit
Clock Input
(1)
>150ns
(2) >0
Don’t care (3)
Don’t care
Don’t care
(11)
Don’t care
PMDAC bit
DAC Internal
State
PD
SDTI pin
Normal Operation
PD
Normal Operation
DACHL,
DACHR bits
(4) >0
3D1-0 bits
(when 3D is used)
“00”(3D OFF)
PMHPL,
PMHPR bits
MUTEN bit
(5) >0
“10”(3D ON )
“00”
(6) >2ms(at 3D OFF), >50ms(at 3D ON)
(4) >0
(5) >0
“10”
(6) >2ms, or >50ms
PD
“00”
ATTL7-0
ATTR7-0 bits
HPL/R pin
00H(MUTE)
(7)
FFH(0dB)
00H(MUTE)
(9) GD (10) 1061/fs (9) (10)
(8)
(7)
FFH(0dB)
00H(MUTE)
(9) (10) (9) (10)
(8)
Figure 26. DAC͓ΑͼHP-ampͷύϫʔΞοϓʗμ΢ϯγʔέϯε(Don’t care: Hi-ZΛআ͘)
(1) ޙ্ཱ͛ͪݯిɺ150nsҎ্͔ͯͬܦΒPDN pinΛ “H”ʹͯ͠Լ͍͞ɻ
(2) PDN pinΛ “H”ʹ͔ͯ͠ΒPMVCM, PMDAC bitʹ “1”Λॻ͖ࠐΜͰԼ͍͞ɻ
(3) DACͷಈ࡞ʹ͸֤ΫϩοΫ(MCKI, BICK, LRCK)͕ඞཁͰ͢ɻPMDAC bit = “0”ͷ࣌͸֤ΫϩοΫΛࢭΊΔ
͜ͱ͕Ͱ͖·͢ɻϔουϑΥϯΞϯϓ͸ΫϩοΫ͕͞څڙΕ͍ͯͳͯ͘΋ಈ࡞͠·͢ɻ
(4) PMVCM, PMDAC bitsʹ “1”Λॻ͖ࠐΜͰ͔ΒDACHL, DACHR bitsʹ “1”Λॻ͖ࠐΜͰԼ͍͞ɻ
(5) 3DػೳΛ࢖༻͢Δͱ͖͸ɺDACHL, DACHR bitsʹ“1”Λॻ͖ࠐΜͰ͔Β3D1-0 bitsʹ“10”Λॻ͖ࠐΜͰ͘
͍ͩ͞ɻ
(6) 3DػೳΛ࢖༻͠ͳ͍৔߹͸ɺDACHL, DACHR bitsʹ “1”Λॻ͖ࠐΜͰ2msҎ্(VCOM pinͷίϯσϯα
2.2µFͷ৔߹)͔ͯͬܦΒPMHPL, PMHPR, MUTEN bitsʹ “1”Λॻ͖ࠐΜͰԼ͍͞ɻ3DػೳΛ࢖༻͢Δ৔߹
͸ɺ3D1-0bitsʹ“10”Λॻ͖ࠐΜͰ50msҎ্͔ͯͬܦΒPMHPL, PMHPR, MUTEN bitsʹ “1”Λॻ͖ࠐΜͰԼ
͍͞ɻ
(7) ϔουϑΥϯΞϯϓͷ্ཱ͕ͪΓ࣌ؒ͸MUTET pinͷίϯσϯα(C)Ͱܾ·ΓɺVCOM/2·Ͱͷ্ཱ͕ͪ
Γ࣌ؒ(t_r)͸70k x C(typ)Ͱ͢ɻC=1µFͷ৔߹ɺt_r͸70ms(typ)Ͱ͢ɻ
(8) ϔουϑΥϯΞϯϓͷཱͪԼ͕Γ࣌ؒ͸MUTET pinͷίϯσϯα(C)Ͱܾ·ΓɺVCOM/2·ͰͷཱͪԼ͕
Γ࣌ؒ(t_f)͸60k x C(typ)Ͱ͢ɻC=1µFͷ৔߹ɺt_f͸60ms(typ)Ͱ͢ɻ
ϔουϑΥϯΞϯϓ͕׬શʹཱͪԼ͕͔ͬͯΒPMHPL, PMHPRʹ “0”Λॻ͖ࠐΈɺͦͷޙDACL, DACR
bitsʹ “0”ɺ 3D1-0bitsʹ“00”Λॻ͖ࠐΜͰԼ͍͞ɻ
(9) σΟδλϧೖྗʹର͢ΔΞφϩάग़ྗ͸22/fs(=499µs@fs=44.1kHz)ͷ܈஗Ԇ(GD)Λ࣋ͪ·͢ɻ
(10) σΟδλϧϘϦϡʔϜͷભҠ࣌ؒ͸ATS bitͰઃఆͰ͖·͢ɻॳظ஋͸1061/fs(=24ms@fs=44.1kHz)Ͱ͢ɻ
(11) ϔουϑΥϯΞϯϓ͕׬શʹཱͪԼ͕͔ͬͯΒిݯΛOFFͯ͠Լ͍͞ɻ
MS0409-J-01
- 34 -
2005/08