AK4368 Datasheet, PDF (38/58 Pages) Asahi Kasei Microsystems – PLL & HP-AMP DAC

ASAHI KASEI
[AK4368]
2) DAC → Lineout
Power Supply
PDN pin
(1) >150ns
(2)
PMVCM, PMPLL,
PMDAC, MCKO bits
>0
Don’t care (3)
MCKI pin
MCKO pin
Unstable
(4) ~20ms
Don’t care Unstable (5)
BICK, LRCK pins
DAC Internal
State
SDTI pin
PD
Don’t care
Unstable
Unstable
Normal Operation
DACL,
DACR bits
(6) >0
(7) >0
3D1-0
(when
bits
3D is
used)
“00”(3D
OFF)
“01”(3D ON)
PMLO bit
(8) >0 (at 3D OFF)
(8) >0 (at 3D ON)
ATTL/R7-0 bits
00H(MUTE)
FFH(0dB)
Don’t care
Don’t care
Unstable
(4) ~20ms
Unstable
Unstable
PD
Unstable
Normal Operation
(6) >0
(7) >0
“00”
“01”
(8) >0 (at 3D OFF)
(8) >0 (at 3D ON)
00H(MUTE)
FFH(0dB)
LMUTE,
ATTS3-0 bits
10H(MUTE)
0FH(0dB)
(10) GD (11) 1061/fs (10) (11)
(10) (11)
(Hi-Z)
(9)
LOUT/ROUT pins
(9)
(9)
(Hi-Z)
Figure 30. DAC͓ΑͼLineoutͷύϫʔΞοϓʗμ΢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·͢ɻLOUT/ROUTग़ྗ෦͸ΫϩοΫ͕͞څڙΕ͍ͯͳͯ͘΋ಈ࡞͠·͢ɻ
(6) PLL͕ϩοΫ͔ͯ͠ΒDACL, DACR bitsʹ “1”Λॻ͖ࠐΜͰԼ͍͞ɻ
(7) 3DػೳΛ࢖༻͢Δͱ͖͸ɺDACL, DACR bitsʹ“1”Λॻ͖ࠐΜͰ͔Β3D1-0 bitsʹ“01”Λॻ͖ࠐΜͰͩ͘͞
͍ɻ
(8) PMLO bitʹ “1”Λॻ͖ࠐΜͰԼ͍͞ɻ
(9) PMLO bitΛ੾Γସ͑ΔͱLOUT, ROUT pinsʹϙοϓϊΠζ͕ग़ྗ͞Ε·͢ɻ
(10) σΟδλϧೖྗʹର͢ΔΞφϩάग़ྗ͸22/fs(=499µs@fs=44.1kHz)ͷ܈஗Ԇ(GD)Λ࣋ͪ·͢ɻ
(11) σΟδλϧϘϦϡʔϜͷભҠ࣌ؒ͸ATS bitͰઃఆͰ͖·͢ɻॳظ஋͸1061/fs(=24ms@fs=44.1kHz)Ͱ͢ɻ
MS0409-J-01
- 38 -
2005/08