AK4386ET Datasheet, PDF (14/18 Pages) Asahi Kasei Microsystems – 100dB 96kHz 24-Bit 2ch ΔΣ DAC

[AK4386]
γεςϜઃܭ
Figure 7͸γεςϜ઀ଓྫͰ͢ɻ۩ମతͳճ࿏ͱଌఆྫʹ͍ͭͯ͸ධՁϘʔυ(AKD4386)Λࢀরͯ͠Լ͍͞ɻ
Master Clock
64fs
24bit Audio Data
fs
Reset & Power down
Mode
Setting
Digital Ground
1 MCLK
2 BICK
3 SDTI
4 LRCK
5 PDN
6 DFS0
7 DFS1
8 DEM
AK4386
TEST 16
DIF1 15
VDD 14
VSS 13
VCOM 12
LOUT 11
ROUT 10
DIF0 9
0.1u ⁺ 10u
4.7u
+
(C)
Lch Out
Rch Out
Analog Supply
2.2 to 3.6V
Analog Ground
஫:
- AK4386ͷVSSͱपลίϯτϩʔϥ౳ͷάϥϯυ͸෼͚ͯ഑ઢͯ͠Լ͍͞ɻ
- LOUT/ROUT͕༰ྔੑෛՙΛۦಈ͢Δ৔߹͸௚ྻʹ఍߅ΛೖΕͯԼ͍͞ɻ
- VCOMʹ͸1μFҎ্10μFҎԼͷίϯσϯαΛ͚ͭͯԼ͍͞ɻ
- શͯͷσΟδλϧೖྗϐϯ͸Φʔϓϯʹ͠ͳ͍ͰԼ͍͞ɻ
Figure 7. Typical Connection Diagram
1. άϥϯυͱిݯͷσΧοϓϦϯά
ͱݯిάϥϯυͷऔΓํʹ͸े෼஫ҙͯ͠Լ͍͞ɻ௨ৗɺVDDʹ͸γεςϜͷΞφϩάిݯΛ௿Πϯϐʔμ
ϯεͰͯ͠څڙԼ͍͞ɻγεςϜͷάϥϯυ͸ΞφϩάͱσΟδλϧͰ෼͚ͯ഑ઢ͠PCϘʔυ্ͷిۙʹݯ
͍ͱ͜ΖͰ઀ଓͯ͠Լ͍͞ɻখ༰ྔͷσΧοϓϦϯάίϯσϯα͸ͳΔ΂͘ిݯϐϯͷۙ͘ʹ઀ଓͯ͠Լ͞
͍ɻ
2. ج४ిѹ
VDDͱVSSͷిҐ͕ࠩΞφϩάग़ྗϨϯδΛઃఆ͠·͢ɻVCOM͸Ξφϩά৴߸ͷίϞϯిѹͱͯ͠࢖ΘΕ
·͢ɻ͜ͷϐϯʹ͸4.7μFఔ౓ͷిղίϯσϯαΛVSSͱͷؒʹ઀ଓͯ͠Լ͍͞ɻVCOM pin͔ΒిྲྀΛऔͬ
ͯ͸͍͚·ͤΜɻσΟδλϧ৴߸ɺಛʹΫϩοΫ͸มௐ΁ثͷΧοϓϦϯάΛආ͚ΔͨΊɺVCOM pin͔ΒͰ
͖Δ͚ͩ཭ͯ͠Լ͍͞ɻ
3. Ξφϩάग़ྗ
AK4386ͷΞφϩάग़ྗ͸γϯάϧΤϯυग़ྗʹͳ͓ͬͯΓɺग़ྗϨϯδ͸VCOMిѹ(0.55 × VDD)Λத৺ʹ
2.0Vpp(typ@VDD=3.0V)Ͱ͢ɻ಺ଂͷΔΣมௐൃ͕ثੜ͢ΔγΣʔϐϯάϊΠζ͸಺ଂͷεΠοντΩϟύγ
λϑΟϧλ(SCF)ͱ࿈ଓϑΟϧλ(CTF)ݮͰਰ͞Ε·͢ɻೖྗίʔυͷϑΥʔϚοτ͸2’sίϯϓϦϝϯτ(2ͷ
ิ਺)Ͱ7FFFFFH(@24bit)ʹରͯ͠͸ਖ਼ͷϑϧεέʔϧɺ800000H(@24bit)ʹରͯ͠͸ෛͷϑϧεέʔϧɺ
000000H(@24bit)Ͱͷཧ૝஋͸VCOMిѹ(0.55 × VDD)͕ग़ྗ͞Ε·͢ɻ
Ξφϩάग़ྗ͸ɺVCOM+਺mVఔ౓ͷDCΦϑηοτΛ࣋ͭͨΊɺ௨ৗͷ࢖༻Ͱ͸ίϯσϯαͰDC੒෼ΛΧ
οτ͠·͢ɻ


MS0280-J-01
- 14 -
2008/10