ak4317 ETC-unknow, ak4317 Datasheet - Page 14

• Manufacturer Part Number: ak4317
• Description: 18bit Scf Dac With Att & Mixer
• Manufacturer: ETC-unknow

ASAHI KASEI
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.
Notes:
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 occurs from analog output in the following cases.
However in case of
from SMUTE="H"), no click noise occur.
0172-E-01
Power-Down
System Reset
Click Noise from analog output
1
2
3
4
5
1
2
3
Analog output corresponding to digital input have the group delay(GD).
Analog outputs are floating(Hi-Z) at the power-down mode.
Click noise about -50dB occurs at the edges("
This noise is output even if "0" data is input.
When the external clocks(MCLK,BICK,LRCK) are stopped, the AK4317 should be in the power-
down mode.
Please mute the analog output externally if the click noise(
The timing example is shown in this figure.
When switching de-empahsis mode by DEM bit or DEM pin.
When switching serial data mode by DIF0,DIF1 pins,
When going and exiting power down mode by PD pin,
1
&
2
, If the input data is "0" or the soft mute is enabled (after 1024 LRCK cycles
Figure 8 . Power-down/up sequence example
- 14 -
") of PD signal.
3
) influences system application.
[AK4317]
1997/5