AK4436 Datasheet, PDF (42/63 Pages) Asahi Kasei Microsystems – 108dB 768kHz 32bit 6-Channel Audio DAC

[AK4436]
(1) Power OFF Function (PW3-1 bits)
All DAC3-1 can be powered down immediately by setting PW3-1 bits to “000”. In this time, the analog
output goes to floating state (Hi-z). DACs will be reset and the digital block is powered down by setting
RSTN bit to “0”. In the reset state, the analog output becomes VCOM voltage if DAC is powered-up and
MCLK, LRCK and BICK are supplied (Table 19). Internal register values are not initialized by power-off or
reset by bit settings. Figure 32 shows a timing example of power-on and power-down.
PMDA3-1bit
Internal
State
D/A In
(Digital)
D/A Out
(Analog)
Clock In
MCLK, BICK, LRCK
DZF
Normal Operation
Power-off
“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 group delay (GD).
(2) Analog outputs are floating (Hi-Z) in power down mode.
(3) Click noise occurs at the edges (“ ”) of the internal timing of PW3-1 bits. This noise is output
even if “0” data is input.
(4) Each clock input (MCLK, BICK, LRCK) can be stopped in power down mode (PW3-1 bits =
“000”).
(5) Mute the analog output externally if the click noise (3) adversely affect system performance.
(6) The DZF pin outputs “L”, in power down mode (PW3-1 bits = “000”).
Figure 32. Power-off/on Sequence Example
016001934-E-00
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2016/03