AK4343VN Datasheet, PDF (61/99 Pages) Asahi Kasei Microsystems – Stereo DAC with HP/RCV/SPK-AMP

[AK4343]
ʻεϐʔΧ࠶ੜ࣌ͷALCઃఆྫʼ
Register Name
LMTH1-0
ZELMN
ZTM1-0
WTM2-0
REF7-0
AVL7-0,
AVR7-0
LMAT1-0
RGAIN1-0
ALC
Comment
Limiter detection Level
Limiter zero crossing detection
Zero crossing timeout period
Recovery waiting period
*WTM2-0 bits should be the same or
longer data as ZTM1-0 bits
Maximum gain at recovery operation
fs=44.1kHz
Data
Operation
00
−2.5dBFS
0
Enable
10
11.6ms
011
23.2ms
C1H
+18dB
Gain of AVOL
91H
0dB
Limiter ATT step
00
Recovery GAIN step
00
ALC enable
1
Table 55. εϐʔΧ࠶ੜ࣌ͷALCઃఆྫ
1 step
1 step
Enable
ʻѹిεϐʔΧ࢖༻࣌ͷ஫ҙ఺ʼ
ѹిεϐʔΧ࢖༻࣌ ͸ɺFigure 58ʹࣔ͢Α͏ʹγϦʔζ఍߅(10ΩҎ্)ΛSPP pin, SPN pinͱεϐʔΧͷؒʹ
ૠೖ͍ͯͩ͘͠͞ɻ·ͨɺ֎෦͔Βѹྗ͕Ճ͑ΒΕͨͱ͖ѹిεϐʔΧ͕ྗిىΛൃੜ͢ΔͷͰɺͦͷରࡦ
ʹFigure 58ʹࣔ͢Α͏ʹεϐʔΧͱGNDؒʹπΣφʔμΠΦʔυΛૠೖ͍ͯͩ͘͠͞ɻπΣφʔμΠΦʔυ
͸ҎԼͷ৚݅Λຬͨ͢΋ͷΛ࢖༻͍ͯͩ͘͠͞ɻ
0.92 x HVDD ≤ πΣφʔμΠΦʔυ(Figure 58ͷZD)ͷπΣφʔిѹ ≤ HVDD+0.3V
Ex) HVDD = 5.0Vͷ࣌: 4.6V ≤ ZD ≤ 5.3V
ྫ͑͹ɺπΣφʔిѹ5.1V(Min஋ 4.97V, Max஋ 5.24V)ͷπΣφʔμΠΦʔυ͕࢖༻ՄೳͰ͢ɻ
SPK-Amp
ZD
≥10Ω
SPP
SPN
≥10Ω
ZD
Figure 58. SPKग़ྗճ࿏(ѹిεϐʔΧͱ઀ଓ͢Δ৔߹)
MS0478-J-02
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2010/11