AK4340_06 Datasheet, PDF (15/23 Pages) Asahi Kasei Microsystems – 192kHz 24-Bit Stereo ΔΣ DAC with 2Vrms Output

ASAHI KASEI
[AK4340]
„ Power-down
The AK4340 is placed in the power-down mode by bringing PDN pin “L” and the analog outputs are GND. Figure 6
shows an example of the system timing at the power-down and power-up.
PDN
Internal
State
D/A In
(Digital)
D/A Out
(Analog)
Clock In
MCLK, LRCK, BICK
DZFL/DZFR
Normal Operation
Power-down
“0” data
GD (1)
(3) (2)
(4)
Don’t care
(6)
Normal Operation
GD (1)
(3)
External
MUTE
(5)
Mute ON
Notes:
(1) The analog output corresponding to digital input has the group delay (GD).
(2) Analog outputs are floating (Hi -Z) at the power-down mode.
(3) Click noise occurs at the edge of PDN signal. This noise is output even if “0” data is input.
(4) The external clocks (MCLK, BICK and LRCK) can be stopped in the power-down mode (PDN = “L”).
(5) Please mute the analog output externally if the click noise (3) influences system application.
The timing example is shown in this figure.
Figure 12. Power-down/up Sequence Example
MS0501-E-00
- 15 -
2006/04