參數(shù)資料
型號(hào)： AKD4384
廠商： Asahi Kasei Microsystems Co.,Ltd
元件分類： 圓形連接器
英文描述： Circular Connector; No. of Contacts:3; Series:MS27484; Body Material:Aluminum; Connecting Termination:Crimp; Connector Shell Size:12; Circular Contact Gender:Socket; Circular Shell Style:Straight Plug; Insert Arrangement:12-3 RoHS Compliant: No
中文描述： 一零六分貝192kHz的24位2通道數(shù)模轉(zhuǎn)換器
文件頁(yè)數(shù)： 13/22頁(yè)
文件大?。?/td> 241K
代理商： AKD4384
ASAHI KASEI
[AK4384]
MS0176-E-00
2002/09
- 13 -
n
Zero Detection
The AK4384 has channel-independent zeros detect function. When the input data at each channel is continuously zeros for
8192 LRCK cycles, DZF pin of each channel goes to “H”. DZF pin of each channel immediately goes to “L” if input data
of each channel is not zero after going DZF “H”. If RSTN bit is “0”, DZF pins of both channels go to “H”. DZF pin of both
channels go to “L” at 2~3/fs after RSTN bit returns to “1”. If DZFM bit is set to “1”, DZF pins of both channels go to “H”
only when the input data at both channels are continuously zeros for 8192 LRCK cycles. Zero detect function can be
disabled by DZFE bit. In this case, DZF pins of both channels are always “L”. DZFB bit can invert the polarity of DZF pin.
n
Soft Mute Operation
Soft mute operation is performed at digital domain. When the SMUTE bit goes to “1”, the output signal is attenuated by -
∞
during ATT_DATA
×
ATT transition time (Table 10) from the current ATT level. When the SMUTE bit is returned to “0”,
the mute is cancelled and the output attenuation gradually changes to the ATT level during ATT_DATA
×
ATT transition
time. If the soft mute is cancelled before attenuating to -
∞
after starting the operation, the attenuation is discontinued and
returned to ATT level by the same cycle. The soft mute is effective for changing the signal source without stopping the
signal transmission.
SMUTE bit
Attenuation
DZF pin
ATT Level
-
∞
AOUT
8192/fs
GD
(2)
GD
(1)
(3)
(4)
(1)
Notes:
(1) ATT_DATA
×
ATT transition time (Table 10). For example, in Normal Speed Mode, this time is 1020LRCK cycles
(1020/fs) at ATT_DATA=255.
(2) The analog output corresponding to the digital input has a group delay, GD.
(3) If the soft mute is cancelled before attenuating to -
∞
after starting the operation, the attenuation is discontinued and
returned to ATT level by the same cycle.
(4) When the input data at each channel is continuously zeros for 8192 LRCK cycles, DZF pin of each channel goes to
“H”. DZF pin immediately goes to “L” if input data are not zero after going DZF “H”.
Figure 5. Soft Mute and Zero Detection
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