AK4371 Datasheet, PDF (40/62 Pages) Asahi Kasei Microsystems – DAC with built-in PLL & HP-AMP

[AK4371]
3) DAC → MOUT
Power Supply
PDN pin
PMVCM bit
Clock Input
PMDAC bit
DAC Internal
State
SDTI pin
DALM,
DARM bits
PMMO bit
ATTL/R7-0 bits
(1) >150ns
(2)
>0s
(5)
Don’t care
(4) >0s
PD(Power-down)
(3) >0s
00H(MUTE)
Normal Operation
FFH(0dB)
Don’t care
Don’t care
PD
00H(MUTE)
Normal Operation
FFH(0dB)
MMUTE,
ATTM3-0 bits
10H(MUTE)
0FH(0dB)
(7) GD (8) 1061/fs (7) (8)
(7) (8)
MOUT pin
(6)
(Hi-Z)
(6)
(6)
(Hi-Z)
Figure 31. Power-up/down sequence of DAC and MOUT (Don’t care: except Hi-Z)
(1) When AVDD and DVDD are supplied separately, AVDD should be powered-up after DVDD rises up to 1.6V or
more. When AVDD and HVDD are supplied separately, AVDD should be powered-up at the same time or earlier
than HVDD. PDN pin should be set to “H” at least 150ns after power is supplied.
(2) PMVCM bit should be changed to “1” after the PDN pin goes “H”.
(3) DALM and DARM bits should be changed to “1” after the PMVCM bit is changed to “1”.
(4) PMDAC and PMMO bits should be changed to “1” after DALM and DARM bits is changed to “1”.
(5) External clocks (MCKI, BICK, LRCK) are needed to operate the DAC. When the PMDAC bit = “0”, these clocks
can be stopped. The MOUT buffer can operate without these clocks.
(6) When the PMMO bit is changed, pop noise is output from MOUT pins.
(7) Analog output corresponding to the digital input has a group delay (GD) of 22/fs(=499μs@fs=44.1kHz).
(8) The ATS bit sets the transition time of the digital attenuator. Default value is 1061/fs(=24ms@fs=44.1kHz).
MS0596-E-00
- 40 -
2007/04