AK4440 AKM [Asahi Kasei Microsystems], AK4440 Datasheet - Page 20

• Manufacturer Part Number: AK4440
• Description: 192kHz 24-Bit 8ch DAC with 2Vrms Output
• Manufacturer: AKM [Asahi Kasei Microsystems]

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