AK4368 Datasheet, PDF (28/58 Pages) Asahi Kasei Microsystems – PLL & HP-AMP DAC

ASAHI KASEI
[AK4368]
„ ιϑτϛϡʔτ

ιϑτϛϡʔτ͸σΟδλϧతʹ࣮ߦ͞Ε·͢ɻSMUTE bitΛ “1”ʹ͢Δͱͦͷ࣌఺ͷATTઃఆ஋͔ΒATTઃ
ఆ஋×ATTભҠ࣌ؒ (Table 18)Ͱೖྗσʔλ͕−∞ (“0”)·ͰΞςωʔγϣϯ͞Ε·͢ɻSMUTE bitΛ “0”ʹ͢Δ
ͱ−∞͔ΒATTઃఆ஋×ATTભҠ࣌ؒͰATTઃఆ஋·Ͱ෮͢·͠ؼɻιϑτϛϡʔτ։࢝ޙɺ−∞·ͰΞςωʔ
γϣϯ͞ΕΔલʹղআ͞ΕΔͱΞςωʔγϣϯ͕தஅ͞Εɺಉ͡αΠΫϧͰATTઃఆ஋·Ͱ෮͢·͠ؼɻι
ϑτϛϡʔτػೳ͸৴߸ΛࢭΊͣʹ৴߸ݯΛ੾Γସ͑Δ৔߹ͳͲʹ༗ޮͰ͢ɻ
SMUTE bit
ATT Level
Attenuation
ATS bit
(1)
ATS bit
(1)
(3)
-∞
GD
GD
(2)
Analog Output
Figure 20. ιϑτϛϡʔτػೳ
Notes:
(1) ATTઃఆ஋×ATTભҠ࣌ؒ (Table 18)ɻྫ͑͹ɺATS bit = “1”࣌ɺATTઃఆ஋͕ “128”(−63.5dB)ͷ৔߹͸
3712/fsαΠΫϧͰ͢ɻ
(2) σΟδλϧೖྗʹର͢ΔΞφϩάग़ྗ͸܈஗Ԇ (GD)Λ࣋ͪ·͢ɻ
(3) ιϑτϛϡʔτ։࢝ޙɺ−∞·ͰΞςωʔγϣϯ͞ΕΔલʹղআ͞ΕΔͱΞςωʔγϣϯ͕தஅ͞Εɺ
ಉ͡αΠΫϧͰATTઃఆ஋·Ͱ෮͢·͠ؼɻ
MS0409-J-01
- 28 -
2005/08