AK4612EQ Datasheet, PDF (30/68 Pages) Asahi Kasei Microsystems – 6/8-Channel Audio CODEC

[AK4612]
■ Differential / Single-End ೖྗ੾Γସ͑
AK4612͸DIE1-3 bitΛ “1”ʹ͢ΔͱDifferentialೖྗ(Figure 19)ɺ“0”ʹ͢ΔͱSingle-Endೖྗ(Figure 20)Λબ୒Ͱ
͖·͢ɻDifferentialೖྗબ୒࣌ʹยଆͷೖྗϐϯΛVCOMిѹɺ΋͏ยଆͷೖྗϐϯΛ৴߸ೖྗͱͯ͠࢖༻͠
ͳ͍Ͱ͍ͩ͘͞ɻSingle-endೖྗબ୒࣌͸ L/RIN1-3- pin ʹ͸L/RIN1-3 pin ʹೖྗ͞Εͨ৴߸ͷ൓స͕ग़ྗ͞Ε
ΔͨΊSingle-endೖྗબ୒࣌͸L/RIN1-3- pin ΛOpenʹ͍ͯͩ͘͠͞ɻ·ͨɺAK4612͸Differentialೖྗબ୒࣌ɺ
Single-Endೖྗબ୒࣌ʹڞΞϯνΤϦΞδϯάϑΟϧλΛ಺ଂ͍ͯ͠·͢ɻ
AK4612
L/RIN+
LPF
L/RIN-
LPF
SCF
Figure 19. Differential Input (DIE1-3 bit = “1”)
AK4612
L/RIN
LPF
SCF
L/RIN-
(Open)
Figure 20. Single-end Input (DIE1-3 bit = “0”)
■ Differential / Single-End ग़ྗ੾Γସ͑
AK4612͸DOE 1-4bitΛ “1”ʹ͢ΔͱDifferentialग़ྗ(Figure 21)ɺ“0”ʹ͢ΔͱSingle-Endग़ྗ(Figure 22)Λબ୒Ͱ
͖·͢ɻSingle-endग़ྗબ୒࣌͸ L/ROUT1-4- pin ʹ͸VCOMిѹ͕ग़ྗ͞ΕΔͨΊSingle-endग़ྗબ୒࣌͸
L/ROUT1-4- pin ΛOpenʹ͍ͯͩ͘͠͞ɻ·ͨɺSingle-endग़ྗબ୒࣌ʹ͸εΠονͱΩϟύγλϑΟϧλ(SCF)
ͱ࿈ଓϑΟϧλ(CTF)Λ಺ଂ͍ͯ͠ΔͨΊΔΣมௐൃ͕ثੜ͢ΔଳҬ֎ϊΠζ(γΣʔϐϯάϊΠζ)Λআ͢ڈ
Δ͜ͱ͕Ͱ͖·͢ɻDifferentialग़ྗબ୒࣌ʹ͸εΠονͱΩϟύγλϑΟϧλ(SCF)͸಺ଂ͞Ε͍ͯ·͕͢ɺ
࿈ଓϑΟϧλ(CTF)Λ಺ଂ͍ͯ͠·ͤΜͷͰଳҬ֎ϊΠζΛআ͍ͨ͠ڈ৔߹͸֎෦ͰLPFΛ૊ΜͰ͍ͩ͘͞ɻ
AK4612
SCF
L/ROUT+
L/ROUT-
Figure 21. Differential Output (DOE1-4 bit = “1”)
AK4612
SCF
Diff
to
Single
LPF
L/ROUT
L/ROUT-
(Open)
Figure 22. Single-end Output (DOE1-4 bit = “0”)
MS1039-J-01
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2009/06