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參數(shù)資料
| 型號(hào)： | AK4317 |
| 廠商： | Asahi Kasei Microsystems Co.,Ltd |
| 英文描述： | 18BIT SCF DAC WITH ATT & MIXER |
| 中文描述： | 18位超臨界DAC，具有先進(jìn)交通運(yùn)輸 |
| 文件頁數(shù)： | 14/19頁 |
| 文件大小： | 171K |
| 代理商： | AK4317 |
ASAHI KASEI
[AK4317]
0172-E-01
1997/5
- 14 -
Power-Down
The AK4317 are placed in the power-down mode by bringing PD pin "L" and the analog outputs are
floating(Hi-Z). Figure 8 shows an example of the system timing at the power-down and power-up.
Figure 8 . Power-down/up sequence example
Notes:
1
{
Analog output corresponding to digital input have the group delay(GD).
2
{
Analog outputs are floating(Hi-Z) at the power-down mode.
3
{
Click noise about -50dB occurs at the edges("
↑↓
") of PD signal.
This noise is output even if "0" data is input.
4
{
When the external clocks(MCLK,BICK,LRCK) are stopped, the AK4317 should be in the power-
down mode.
5
{
Please mute the analog output externally if the click noise(
3
{
) influences system application.
The timing example is shown in this figure.
System Reset
The AK4317 should be reset once by bringing PD "L" upon power-up. The AK4317 is powered up and
the internal timing starts clocking by LRCK "
↑
" after exiting reset and power down state by MCLK. The
AK4317 is in power-down mode until LRCK is input.
Click Noise from analog output
Click noise occurs from analog output in the following cases.
1
{
When switching de-empahsis mode by DEM bit or DEM pin.
2
{
When switching serial data mode by DIF0,DIF1 pins,
3
{
When going and exiting power down mode by PD pin,
However in case of
1
{
&
2
{
, If the input data is "0" or the soft mute is enabled (after 1024 LRCK cycles
from SMUTE="H"), no click noise occur.
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| AK4317-VF | 制造商:AKM 制造商全稱:AKM 功能描述:18BIT SCF DAC WITH ATT & MIXER |
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| AK4319A | 制造商:AKM 制造商全稱:AKM 功能描述:18Bit SCF DAC |
| AK4319AVM | 制造商:AKM 制造商全稱:AKM 功能描述:18Bit SCF DAC |
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