AK4386ET Datasheet, PDF (9/18 Pages) Asahi Kasei Microsystems – 100dB 96kHz 24-Bit 2ch ΔΣ DAC

[AK4386]
ಈ࡞આ໌
■ γεςϜΫϩοΫ
AK4386ʹඞཁͳΫϩοΫ͸ɺMCLK, BICK, LRCKͰ͢ɻMCLKͱLRCK͸ಉ͢ظΔඞཁ͸͋Γ·͕͢ɺҐ૬
Λ߹ΘͤΔඞཁ͸͋Γ·ͤΜɻMCLK͸ΠϯλʔϙϨʔγϣϯϑΟϧλͱΔΣมௐ͞༻࢖ʹثΕ·͢ɻMCLK
प೾਺͸ೖྗ͞ΕΔMCLKͱLRCKͷؔ܎͔Β಺෦Ͱࣗಈݕग़͞Ε·͢ɻ·ͨɺDFS1-0 pinͰHalf speedϞʔυɺ
Normal speedϞʔυͼٴDouble speedϞʔυΛબ୒͠·͢(Table 1)ɻAutoϞʔυ(DFS1 pin = DFS0 pin = “H”)ͷ
৔߹ʹ͸ɺαϯϓϦϯάεϐʔυϞʔυ͸MCLKप೾਺ʹΑΓࣗಈઃఆ͞Ε·͢(Table 2)ɻ
ಈ࡞࣌(PDN pin = “H”)ʹMCLK͕ࢭ·ͬͨ৔߹ʹ͸ɺAK4386͸ύϫʔηʔϒϞʔυʹͳΓࣗಈతʹ಺෦ύϫ
ʔμ΢ϯ͕ߦΘΕɺΞφϩάग़ྗ͸VCOMిѹΛग़ྗ͠·͢ɻMCLKΛ࠶ೖྗޙɺύϫʔμ΢ϯ͕ղআ͞Ε
·͢ɻిݯ౤ೖޙ౳ͷϦηοτղআ࣌(PDN pin = “L” → “H”)͸ɺMCLK, LRCK͕ೖྗ͞ΕΔ·Ͱύϫʔμ΢
ϯঢ়ଶͰ͢ɻ
ಈ࡞தʹDIF1-0 pinΛ੾Γସ͑ͨ৔߹͸ɺPDN pinͰϦηοτͯ͠Լ͍͞ɻ
Mode
Normal Speed
Double Speed
Half Speed
Auto
DFS1
L
L
H
H
DFS0
fs
L
8 ∼ 48kHz
H
48 ∼ 96kHz
L
8 ∼ 24kHz
H
8 ∼ 96kHz
Table 1. System Clock Example
MCLK Frequency
256/384/512/768fs
128/192/256/384fs
512/768/1024/1536fs
Table 2
MCLK Frequency
512/768fs
128/192/256/384fs
1024/1536fs
Sampling Speed Mode
Normal Speed
Double Speed
Half Speed
Table 2. Auto Mode
fs
8 ∼ 48kHz
48 ∼ 96kHz
8 ∼ 24kHz
■ ΦʔσΟΦΠϯλϑΣʔεϑΥʔϚοτ
4छྨͷσʔλϑΥʔϚοτ͕DIF1-0 pinͷઃఆ(Table 3)ʹΑΓͰબ୒Ͱ͖·͢ɻશϞʔυͱ΋MSBϑΝʔε
τɺ2’sίϯϓϦϝϯτͷσʔλϑΥʔϚοτͰBICKͷ্ཱ͕ͪΓͰϥον͞Ε·͢ɻMode 3Λ16ϏοτͰ
࢖༻͢Δ৔߹ʹ͸ɺBICK ≥ 48fsʹͯ͠σʔλͷͳ͍LSBʹ͸“0”Λೖྗ͢Δ͔ɺ΋͘͠͸BICK = 32fsʹͯ͠Լ
͍͞ɻ
Mode
0
1
2
3
DIF1
L
L
H
H
DIF0
SDTI Format
L
16bit, LSB justified
H
24bit, LSB justified
L
24bit, MSB justified
H
16/24bit, I²S Compatible
Table 3. Audio Interface Format
BICK
≥ 32fs
≥ 48fs
≥ 48fs
≥ 48fs or 32fs
Figure
Figure 1
Figure 2
Figure 3
Figure 4
MS0280-J-01
-9-
2008/10