AK4440 Datasheet, PDF (20/31 Pages) Asahi Kasei Microsystems – 192kHz 24-Bit 8ch DAC with 2Vrms Output

[AK4440]
■ Reset Function
When the MCLK, LRCK or BICK stops, the AK4440 is placed in reset mode and its analog outputs are set to VSS (0V,
typ). When the MCLK, LRCK and BICK are restarted, the AK4440 returns to normal operation mode.
Clock In
MCLK, BICK, LRCK
Internal
State
Normal Operation
(1) (2)
MCLK or BICK or LRCK
Stop
Reset
Normal Operation
D/A In
(Digital)
D/A Out
(Analog)
(3)
(5)
VSS
(5)
GD (4)
Notes:
(1) Clocks (MCLK, BICK, LRCK) can be stopped in the reset mode (MCLK or LRCK or BICK is stopped).
(2) The AK4440 detects the stop of LRCK or BICK if LRCK or BICK stops for more than 2048/fs. When LRCK is
stopped, the AK4440 exits reset mode after LRCK is inputted. When BICK is stopped, the AK4440 exits reset
mode after BICK is input.
(3) Digital data can be stopped. The click noise after MCLK, LRCK and BICK are input again can be reduced by
inputting the “0” data during this period.
(4) The analog output corresponding to a specific digital input has group delay (GD).
(5) No audible click noise occurs under normal conditions.
Figure 20. Reset Timing Example
MS1088-E-01
- 20 -
2011/03