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參數(shù)資料
| 型號： | AK4319A |
| 廠商： | Asahi Kasei Microsystems Co.,Ltd |
| 英文描述： | 18Bit SCF DAC |
| 中文描述： | 18位超臨界數(shù)模轉(zhuǎn)換器 |
| 文件頁數(shù)： | 11/18頁 |
| 文件大?。?/td> | 177K |
| 代理商： | AK4319A |
ASAHI KASEI
[AK4319A]
M0011-E-01
1998/6
- 11 -
De-emphasis filter
The AK4319A includes the digital de-emphasis filter(tc=50/15us) by IIR filter. This filter corresponds to
three sampling frequencies(32kHz,44.1kHz,48kHz). De-emphasis is enabled by the following two ways.
DEM1
DEM0
Mode
0
0
1
0
1
0
44.1kHz
OFF
48kHz
1
1
32kHz
Table 3 . De-emphasis filter control
Zero detection
After the input data at both channels are continuously zeros for 8192 LRCK cycles or when the muting
period exceeds 8192+1022 LRCK cycles, DZF goes to "H". DZF goes "L" immediately after non zero
data is input or soft mute is released.
Soft mute operation
When SMUTE goes "H", the output signal is attenuated into -
∞
during 1022 LRCK cycles. SMUTE is
returned to "L", the mute condition is released and the output attenuation gradually changes to 0dB
during 1022 LRCK cycles. If the soft mute is released within 1022LRCK cycles, the attenuation is
recovered to 0dB with same gradient and cycles.
The soft mute function is effective when changing the signal source without stopping the signal
transmission.
Notes:
1
{
The output signal is attenuated into -
∞
during 1022 LRCK cycles(1022/fs).
2
{
Analog output corresponding to digital input have the group delay(GD).
3
{
If the soft mute is released within 1022 LRCK cycles, the attenuation is recovered to 0dB.
4
{
When the input data at both channels are continuously zeros for 8192 LRCK cycles, DZF goes to
"H". DZF goes "L" immediately after non-zero data is input.
Figure 6 . Soft mute and zero detection
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相關(guān)代理商/技術(shù)參數(shù) |
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| AK4319AVM | 制造商:AKM 制造商全稱:AKM 功能描述:18Bit SCF DAC |
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| AK4319VM-E2 | 制造商:ASAHI 功能描述:SERIAL INPUT LOADING, 18-BIT DAC, 24 Pin Plastic SMT |
| AK4320VM | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Converter IC |
| AK4321024D | 制造商:ACCUTEK 制造商全稱:ACCUTEK MICROCIRCUIT CORPORATION 功能描述:65,536 x 32 Bit CMOS/BiCMOS Static Random Access Memory |
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