AK4368 Datasheet, PDF (37/58 Pages) Asahi Kasei Microsystems – PLL & HP-AMP DAC

ASAHI KASEI
[AK4368]
„ ύϫʔΞοϓʗμ΢ϯγʔέϯε(PLL Slave mode)
1) DAC → HP-Amp
Power Supply
PDN pin
(1)
>150ns
PMVCM, PMPLL,
PMDAC, MCKO bits
(2) >0
Don’t care (3)
MCKI pin
MCKO pin
Unstable (4) ~20ms
Don’t care
Don’t care
Unstable
(4) ~20ms
BICK,
LRCK pins
DAC Internal
State
SDTI pin
DACHL,
DACHR bits
Don’t care (5)
Unstable
PD
Don’t care
Normal Operation
Unstable
(6) >0
Unstable
Unstable
PD
Unstable
Normal Operation
(6) >0
3D1-0 bits
(when 3D is used)
“00”(3D OFF)
PMHPL,
PMHPR bits
MUTEN bit
(7) >0
“10”(3D ON )
“00”
(8) >2ms(at 3D OFF), >50ms(at 3D ON)
(7) >0
“10”
(8) >2ms, or >50ms
(13)
Don’t care
Don’t care
PD
Don’t care
“00”
ATTL7-0
ATTR7-0 bits
HPL/R pin
00H(MUTE)
FFH(0dB)
(11) GD (12) 1061/fs (11) (12)
(9)
00H(MUTE)
(10)
(9)
FFH(0dB) _00H(MUTE)
(11)(12) (11) (12)
(10)
Figure 29. DAC͓ΑͼHP-ampͷύϫʔΞοϓʗμ΢ϯγʔέϯε (Don’t care: Hi-ZΛআ͘)
(1) ޙ্ཱ͛ͪݯిɺ150nsҎ্͔ͯͬܦΒPDN pinΛ “H”ʹͯ͠Լ͍͞ɻ
(2) PDN pinΛ “H”ʹ͔ͯ͠ΒPMVCM, PMPLL, PMDAC, MCKO bitsʹ “1”Λॻ͖ࠐΜͰԼ͍͞ɻ
(3) MCKI pinʹγεςϜΫϩοΫΛೖྗ͢ΔͱPLL͕ಈ࡞Λ։࢝͠·͢ɻ
(4) PLLͷϩοΫ࣌ؒ͸Table 1ΛࢀরɻPLL͕ϩοΫ͢ΔͱMCKO pin͔ΒϚελΫϩοΫ͕ग़ྗ͞Ε·͢ɻ
(5) DACͷಈ࡞ʹ͸MCKOΛ֎෦Ͱ෼प֤ͨ͠ΫϩοΫ(BICK, LRCK)͕ඞཁͰ͢ɻPMDAC bit = “0”ͷ࣌͸֤
ΫϩοΫΛࢭΊΔ͜ͱ͕Ͱ͖·͢ɻϔουϑΥϯΞϯϓ͸ΫϩοΫ͕͞څڙΕ͍ͯͳͯ͘΋ಈ࡞͠·͢ɻ
(6) PLL͕ϩοΫ͔ͯ͠ΒDACHL, DACHR bitsʹ “1”Λॻ͖ࠐΜͰԼ͍͞ɻ
(7) 3DػೳΛ࢖༻͢Δͱ͖͸ɺDACHL, DACHR bitsʹ“1”Λॻ͖ࠐΜͰ͔Β3D1-0 bitsʹ“10”Λॻ͖ࠐΜͰ͘
͍ͩ͞ɻ
(8) 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
(9) ϔουϑΥϯΞϯϓͷ্ཱ͕ͪΓ࣌ؒ͸MUTET pinͷίϯσϯα(C)Ͱܾ·ΓɺVCOM/2·Ͱͷ্ཱ͕ͪ
Γ࣌ؒ(t_r)͸70k x C(typ)Ͱ͢ɻC=1µFͷ৔߹ɺt_r͸70ms(typ)Ͱ͢ɻ
(10) 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
(11) σΟδλϧೖྗʹର͢ΔΞφϩάग़ྗ͸22/fs(=499µs@fs=44.1kHz)ͷ܈஗Ԇ(GD)Λ࣋ͪ·͢ɻ
(12) σΟδλϧϘϦϡʔϜͷભҠ࣌ؒ͸ATS bitͰઃఆͰ͖·͢ɻॳظ஋͸1061/fs(=24ms@fs=44.1kHz)Ͱ͢ɻ
(13) ϔουϑΥϯΞϯϓ͕׬શʹཱͪԼ͕͔ͬͯΒిݯΛOFFͯ͠Լ͍͞ɻ
MS0409-J-01
- 37 -
2005/08