ak4420 AKM Semiconductor, Inc., ak4420 Datasheet - Page 14

• Manufacturer Part Number: ak4420
• Description: 192khz 24-bit Stereo ?? Dac With 2vrms Output
• Manufacturer: AKM Semiconductor, Inc.

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When the MCLK or LRCK stops, the AK4420 is placed in reset mode and its analog outputs are set to VSS (0V, typ).
When the MCLK and LRCK are restarted, the AK4420 returns to normal operation mode. The BICK can be stopped
when MCLK or LRCK is stopped, but it must not be stopped when MCLK and LRCK are supplied.
Notes:
MS0683-E-04
Reset Function
(1) Digital data can be stopped. The click noise after MCLK and LRCK are input again can be reduced by inputting
(2) The analog output corresponding to a specific digital input has group delay (GD).
(3) No audible click noise occurs under normal conditions.
(4) Clocks (MCLK, BICK, LRCK) can be stopped in the reset mode (MCLK or LRCK is stopped).
(5) The AK4420 detects the stop of LRCK if LRCK stops for more than 2048/fs. When LRCK is stopped, the
(6) The DZF pin is set to “L” in the reset mode.
D/A Out
<Case1:MCLK Stop>
Clock In
MCLK, BICK, LRCK
Internal
D/A In
<Case2:LRCK Stop>
Clock In
MCLK, BICK, LRCK
DZF
DZF
the “0” data during this period.
AK4420 exits reset mode after LRCK is inputted..
(Analog)
(Digital)
State
Normal Operation
Figure 9. Reset Timing Example
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(3)
(4)
(4)
(6)
(6)
(5)
MCLK Stop
LRCK Stop
Reset
(1)
VSS
(3)
Normal Operation
GD
(2)
[AK4420]
2008/06