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參數(shù)資料
| 型號： | AK4386VT |
| 廠商： | Asahi Kasei Microsystems Co.,Ltd |
| 英文描述： | 100DB 96KHZ 24 BIT 2CH |
| 中文描述： | 100dB的96kHz的24位二通 |
| 文件頁數(shù)： | 11/16頁 |
| 文件大?。?/td> | 129K |
| 代理商： | AK4386VT |
ASAHI KASEI
[AK4386]
MS0280-E-00
2003/12
- 11 -
n
De-emphasis Filter
The AK4386 includes the digital de-emphasis filter (tc=50/15
μ
s) by IIR filter. This filter corresponds to 44.1kHz
sampling. The de-emphasis filter is enabled by setting DEM pin “H”. In case of Half speed and Double speed mode, the
digital de-emphasis filter is always off.
Mode
DFS1 pin
DFS0 pin
L
L
Normal Speed
L
L
Double Speed
L
H
Half Speed
H
L
H
H
Auto
H
H
Table 4. De-emephasis Filter (*: Don’t care)
Note. The digital de-emphasis filter corresponds to 44.1kHz sampling.
In case of Half speed and Double speed mode, the digital de-emphasis filter is always off.
n
Power-down
The AK4386 is placed in the power-down mode by bringing PDN pin = “L”. and the digital filter is reset at the same time.
This reset should always be done after power up.
When PDN pin = “L”, DAC outputs go to Hi-Z. Also, the internal power down is automatically done when MCLK stops
during operating (PDN pin =“H”), and the analog outputs go to the VCOM voltage. MCLK pin should be fixed to “H” or
“L” when MCLK stops.
Mode
PDN pin
MCLK
0
L
Don’t care
1
Supplied
2
Not Supplied
Table 5. Power down mode
DEM pin
L
H
*
*
L
H
De-emphasis Filter
OFF
ON
OFF
OFF
OFF
ON (Note)
DAC Output
Hi-Z
Normal Output
VCOM Voltage
State
Full Power Down
Normal
Power Save
H
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